sophos client authentication agent could not validate certificate

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Date: 12/12/2022

at Microsoft.Exchange.Security.Authentication.BackendRehydrationModule. May I know total number of Win 10 Systems/PC/laptops are affected? As a result, the browser falls back to using NTLM or the captive portal for authentication. Thanks for the update. Set the proxy redirection URL. Some common issues for authentication failure are: Configuration errors, domain join failures, and in the case of Kerberos the key version number (KVNO) not matching between endpoints and Sophos Firewall. TryGetCommonAccessToken (HttpContext httpContext, Stopwatch stopwatch, CommonAccessToken& token) at Microsoft.Exchange.Security.Authentication.BackendRehydrationModule. SAA will now close. If the connection fails, you must resolve the AD connectivity issues. Download EXE: Downloads the Client Authentication program including the CA certificate for direct installation on client PCs. To configure MFA for users other than the default admin account, do as follows: Under One-time password (OTP), select if you want to turn on MFA for All users or Specific users and groups. Browsers will only automatically send login credentials (single sign-on) if they're sure that the site requesting them is local. I then regenerated the certificates, uninstalled CAA, re-imported certificate, and re-installed CAA all with no luck. I was about to update to latest firmware when I decided to just reboot the XG firewall. Check a firewall rule is in place to allow Kerberos and NTLM traffic for the affected clients under Rules and policies > Firewall rules. If your DNS and Active Directory use different domain names (such as mycompany.com and mycompany.local), and you want to use the DNS name in redirection, you must manually create the SPN on your AD domain controller. Are you installing with administrative rights on this one computer? Replace IPADDRESS with the IP addresses of the server. Configure a hostname on Sophos Firewall. Under Admin console and end-user interaction > Certificate, select the certificate to use from the drop-down menu. The certificate can be one that has been purchased from a public certificate authority and is automatically trusted by all clients. This version of the product has reached end of life. Help us improve this page by, Sophos Authentication for Thin Client (SATC), Sophos Firewall and third-party authenticators, Install a subordinate certificate authority (CA) for HTTPS inspection. Make sure the endpoint computer can resolve the Sophos Firewall by the method you select. If the terminal server is not shown in the above steps, add it using the following command: system auth thin-client add citrix-ip IPADDRESS. Thanks. To use a different FQDN or a bare hostname, go to Administration > Admin settings > Admin console and end-user interaction, select Use a different hostname, and enter the hostname you want to use. Replace IPADDRESS with the IP addresses of the server. The browser displays a pop-up asking for credentials or directs users to the captive portal. You must change this to use either a bare hostname or an FQDN. NOTE: The app requires . When attempting to authenticate via Active Directory SSO using Kerberos with the HTTP proxy in transparent mode, the Kerberos authentication fails. Open Run. There is a bug with CAA and the solution is to regenerate the appliance CA and reinstall the client. Set the proxy redirection URL. If that doesn't work for you, then I worry that you will need to consult support to look into it. Alternatively, to manually add the FQDN to a browser, follow the steps below. Click on your AD server and then click Test connection. Are there any differences between this one laptop and the other computers in terms of permissions or rights? Browsers will only automatically send login credentials (single sign-on) if they're sure that the site requesting them is local. 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This is the first part of the FQDN that you configure in the, One SPN is created for the bare hostname, followed by the AD domain. For Windows Download the CAA installer on the computer of the user. Maybe all I had to do was reboot our XG firewall? Multi-factor authentication (MFA) settings. If you're redirecting using a bare hostname, the browser will see that the requester is local and automatically trust it to perform SSO. Can you also, update me on the other steps I suggested you? With each update, there is a possibility that client certificate authentication could start working again on a specific MacOS or Safari version. SecureAuth Knowledge Base Articles provide information based on specific use cases and may not apply to all appliances or configurations. When the Sophos Firewall joins the AD Domain, it's given an AD computername, and two SPN entries are automatically created. Browsers will only automatically perform Kerberos login (single sign-on) if they're sure that the site requesting credentials is part of the Kerberos domain. Management, Networking, Logging and Reporting, Could not validate certificate! Go to Administration > Admin settings > Hostname. 1997 - 2022 Sophos Ltd. All rights reserved. 2) Make sure that time is correctly set on the appliance in that firmware version. 1) Need to rollback to previous version where CAA agent is working fine. Click Configure > Security. I would suggest to upgrade the firmware to the latest version and share the feedback, The latest firmware is available refer the following link :https://community.sophos.com/sophos-xg-firewall/b/blog/posts/sophos-firewall-v19-mr1-re_2d00_release-build-365-is-now-available. Only one client is not working and bringing the same error: Could not validate certificate! This will list the IP addresses of your terminal servers. Configure a hostname on Sophos Firewall. As of Sophos Mobile 6.0, the External EAS Proxy component of Sophos Mobile Control supports the client device certificate authentication. Make sure all expected IP addresses are shown. ; To add a certificate authority to the custom certificate list, see "Adding a Root Authority Certificate". Sophos Firewall OS v19 MR1 is Now Available: https://community.sophos.com/sophos-xg-firewall/b/blog/posts/sophos-firewall-v19-mr1-is-now-available Thanks & Regards, 5. Here's an example: Enter your passcode. 2. If it's a bare hostname, it must match the bare hostname SPN that was created automatically. For more information see chapter Web Protection > Web Filtering > Global. Client devices fail authentication when Kerberos and NTLM are configured. To use a different FQDN or a bare hostname, go to Administration > Admin settings > Admin console and end-user interaction, select Use a different hostname, and enter the hostname you want to use. If there is, Sophos Firewall has a port mismatch and the traffic is treated as unauthenticated. Download DMG: Downloads the Client Authentication Mac OSX disk image. When Client Authentication is enabled, you can download the Sophos Authentication Agent (SAA) here. Error: "Could not validate certificate! we have the same problem and the time on firewall and client is correct. You can either distribute the SAA manually or have your users download the client from the User Portal. There can be a number of reasons that users are unable to authenticate. You may need to add entries to your DNS server. Therefore, if you configure the Sophos Firewall. It was checked for updates 63 times by the users of our client application UpdateStar during the last month. Open Sophos Network Agent, import the CA certificate you've downloaded from the user portal, and click Yes. From the Auth type list, select OpenSSH config and authentication agent.. The automatically created SPN matches the Admin settings > Hostname field. Enter certmgr.msc and click OK. Go to Trusted Root Certification Authorities > Certificates. The self-signed certificate that comes installed on Sophos Firewall doesn't come from a trusted certificate authority and doesn't cover the hostname or FQDN that you've configured. Sophos Network Agent enables Sophos Firewall to authenticate local network users using mobile devices running iOS 13 and later. Go to Download client > Authentication clients and click Download certificate for iOS 12 and earlier and Android to download the authentication server CA certificate. To troubleshoot authentication, you will typically need access to both Sophos Firewall and the authentication server as well as a client device that is failing authentication. Sophos Central is the unified console for managing all your Sophos products. If you use Internet Explorer, do the following to disable Enhanced Protected Mode. If you have configured Sophos Firewall as an explicit proxy, make sure the hostname has been used in the browser settings. There is no issue with UAC with the Firefox web browser. For example, myfirewall.mycompany.com. I have the same problem. The account is administrator. Troubleshoot common Kerberos and NTLM issues. This issue is normally caused when the hostname of Sophos Firewall is changed. Troubleshoot common Kerberos and NTLM issues. To remove browser warnings about certificates, the certificate must cover the hostname or FQDN that traffic is redirected to. Click Save. If you use Google Chrome, do the following to update Runs network service in-process settings: Users will be able to authenticate via SATC as expected.*. SATC supports only TCP connections, not UDP connections. This image is designed for installation on client computers having an OSX operating system. Follow the steps in Sophos Firewall: Install and configure Sophos General Authentication Client for macOS. Users of terminal servers such as Citrix must use a thin client (SATC) to sign in. To troubleshoot authentication, you will typically need access to both Sophos Firewall and the authentication server as well as a client device that is failing authentication. When attempting to authenticate via Active Directory SSO using NTLM with the HTTP proxy in transparent mode, the NTLM authentication fails. Follow the steps below to check that your systems are configured correctly and correct any issues you find. As a result, the browser falls back to using NTLM or the captive portal for authentication. Generate a locally signed certificate as follows: On Sophos Firewall, go to Certificates > Generate locally-signed certificate. This can be set up per instance on the External EAS Proxy. Regenerated the certificates on firewall, the Default and the appliance ones. If you have used an IP address, the client allows only NTLM authentication. Listed Exchange 2016 default authentication settings on virtual directories from a . Authentication server is used as primary or secondary authentication server - Sophos XG Featured by dakseven, posted in Active Directory, firewall Sophos XG AD integration problem. I went away over the weekend and on login on Monday I now get the following error and the CAA exits, nothing should have changed from when it was last working on Friday. Alternately, it can be a self-signed certificate from an internal certificate authority that the endpoint computers have been configured to trust. ; To remove a certificate from the custom certificate list, select the check box to the right of the certificate in the custom certificate list that you want to remove, click . 1997 - 2022 Sophos Ltd. All rights reserved. Unfortunately i'm still getting the same results. The self-signed certificate that comes installed on Sophos Firewall doesn't come from a trusted certificate authority and doesn't cover the hostname or FQDN that you've configured. For more information, see, To use the configured FQDN of Sophos Firewall, go to, One SPN is created for the bare hostname. You may need to add entries to your DNS server. Enter a Hostname. This will list the IP addresses of your terminal servers. Set the validity period to two years to meet the requirements for iOS devices. Thin Client (SATC) users can't sign in NTLM and Kerberos troubleshooting Endpoint computer can't authenticate via NTLM due to the redirection URL When you're redirecting to perform AD SSO, the browser attempts to match an SPN and must trust it to perform Kerberos authentication. If your DNS and Active Directory use different domain names (such as mycompany.com and mycompany.local), and you want to use the DNS name in redirection, you must manually create the SPN on your AD domain controller. Due to the above limitation, the proxy server cannot be configured for the Distribution Server, if the client certificate authentication is . Select a certificate that browsers will automatically trust. As SATC sends the username over port 6060, users don't appear in the live user list. If authentication fails, follow the steps below to troubleshoot the issue. Sachin Gurung Team Lead | Sophos Technical Support Knowledge Base|@SophosSupport|Video tutorials Remember to like a post. If the connection fails, you must resolve the AD connectivity issues. Some common issues for authentication failure are: Configuration errors, domain join failures, and in the case of Kerberos the key version number (KVNO) not matching between endpoints and Sophos Firewall. If you are using HTTPS scanning this will impact and give you certificate error to resolve re install Sophos SSL CA again on end system/s as per the below link : XG Firewall CAA "Could not validate certificate! If it's a DNS FQDN, it must match the DNS SPN that you created manually. Authentication server could not be deleted. The latest firmware is available refer the following link : Sophos Firewall requires membership for participation - click to join, https://community.sophos.com/sophos-xg-firewall/b/blog/posts/sophos-firewall-v19-mr1-is-now-available, https://support.sophos.com/support/s/article/KB-000035645?language=en_US, https://community.sophos.com/sophos-xg-firewall/b/blog/posts/sophos-firewall-v19-mr1-re_2d00_release-build-365-is-now-available. Click the Client certificate-based security radio button so it's enabled. If you use Internet Explorer, do the following to minimize or disable User Account Control (UAC): User Account Control is a security component that allows an administrator to enter credentials during a non-administrator's session to perform administrative tasks. View the chart and read the warnings. In another thread that has not yet been restored at astaro.org: https://www.astaro.org/gateway-products/web-protection-web-filtering-application-visibility-control/55187-could-not-validate-certificate-saa-will-now-close.html, "I have found a few posts similar with this error message but non of them seem to help.I installed the Sophos Agent on my local machine (Win 8) and entered my Active Directory credentials, this worked a treat and web filtering was working as expected.I then restarted the machine and logged back on with the same credentials and I get the error:Could not validate certificate! Add or select the networks that should use Client Authentication. If it's a DNS FQDN, it must match the DNS SPN that you created manually. Hello Paul Norris1,Thank you for reaching out to the community,based on the reported issue as it was working fine previously, it seemsXG is sending the CA certificate with the future date stored under /conf/certificate/internalcas/ClientAuthentication_CA.der. If apost solvesyourquestion please use the'Verify Answer' button. Go to Administration > Admin settings > Hostname. To Regenerate certificate authority follow the below steps. I think i might have found the issue. Sophos Network Agent allows a local network user to authenticate himself/herself to the Sophos XG Firewall (SFOS) with an iOS device. Configure the user inactivity timer for STAS, Check connectivity between an endpoint device and authentication server using STAS, Migrate to another authenticator application, Use Sophos Network Agent for iOS 13 devices, Use Sophos Network Agent for iOS 12 and Android devices, Sophos Authentication for Thin Client (SATC), Set up SATC with Sophos Server Protection, Sophos Firewall and third-party authenticators, Couldn't register Sophos Firewall for RED services, Configure a secure connection to a syslog server using an external certificate, Configure a secure connection to a syslog server using a locally-signed certificate from Sophos Firewall, Guarantee bandwidth for an application category, How to enable Sophos Central management of your Sophos Firewall, Synchronized Application Control overview, Reset your admin password from web admin console, Download firmware from Sophos Licensing Portal, Troubleshooting: Couldn't upload new firmware, Install a subordinate certificate authority (CA) for HTTPS inspection, Use Sophos Mobile to enable mobile devices to trust CA for HTTPS decryption, https://docs.sophos.com/nsg/sophos-firewall/latest/Help/en-us/webhelp/onlinehelp/. You must use a fully qualified domain name (FQDN) that matches your company domain. 3) Upgrade the firmware. Please see the below from the help file for an explanation of the files. For more information, see, To use the configured FQDN of Sophos Firewall, go to, One SPN is created for the bare hostname. When the Sophos Firewall joins the AD Domain, it's given an AD computername, and two SPN entries are automatically created. If you're redirecting using an FQDN, configure your browser to trust the FQDN of Sophos Firewall using AD Group Policy. Alternately, it can be a self-signed certificate from an internal certificate authority that the endpoint computers have been configured to trust. There is no issue with UAC with the Firefox web browser. I removed all the various certificates that have been downloaded from the UTM since I first installed and tried a reinstall of SAA, but that still didn't do the certificate install phase. CAA will now close error", XG Firewall Version: SFOS 19.0.0 GA-Build317, Client: Window 10 running Client Authentication Agent v2.0.1. The default configuration is for the Sophos Firewall to redirect the proxy to a URL containing the IP. If a post (on a question thread) solvesyourquestion use the 'This helped me'link. If that doesn't help then, Regenerate Default CA and do not use the apostrophe in any fields. When UAC is enabled, Internet Explorer bypasses the LSP registration. Do you install the SAA with the .msi or the .exe file ? This package is designed for automatic package installation via domain controller (DC) and does not contain the CA certificate. 2) Make sure that time is correctly set on the appliance in that firmware version. Anyone has a solution or an idea? If you use Internet Explorer, do the following to minimize or disable User Account Control (UAC): User Account Control is a security component that allows an administrator to enter credentials during a non-administrator's session to perform administrative tasks. This is the first part of the FQDN that you configure in the, One SPN is created for the bare hostname, followed by the AD domain. The requesting site, in this case, Sophos Firewall, must be using a hostname or FQDN for redirection that matches the service principal name (SPN) of the firewall on the Active Directory (AD) server. In this example, a shared self signed certificate is used to authenticate one application calling an API on a second ASP.NET Core application. Check a firewall rule is in place to allow Kerberos and NTLM traffic for the affected clients under Rules and policies > Firewall rules. User authentication can be performed using a local database, Active Directory, LDAP, RADIUS, TACACS, eDirectory, NTLM or a combination of these. Browsers will only automatically perform Kerberos login (single sign-on) if they're sure that the site requesting credentials is part of the Kerberos domain. Customized Virtual directory authentication settings - There could be change in Authentication settings. I'm trying to setup the CAA to client pc's, however, when i run CAA it comes up with a message, "Could not validate the certificate, CAA will now close". The default configuration is for the Sophos Firewall to redirect the proxy to a URL containing the IP. Download CA: Downloads the CA certificate that has to be rolled out in addition to the MSIpackage. Finally, please let us know what Firmware resides on the XG. Client Authentication Agent could not validate the certificate, Remember to like a post. Introduction Sophos Network Agent is an authentication client. If you're redirecting using a bare hostname, the browser will see that the requester is local and automatically trust it to perform SSO. Alternatively, to manually add the FQDN to a browser, follow the steps below. This can be the configured FQDN, a different FQDN (such as the AD computername), or a bare hostname. Here's an example: I am running version 8.0.4-5 of the UID agent. So, if anyone has found a solution to the issue of "Could not validate certificate! Check if there is any proxy software or security software installed on the server that might change the source port. Make sure that the domain controller is configured as a management server by running the following command from a PowerShell prompt: Get-DAMgmtServer -Type All. To use a different FQDN or a bare hostname, go to Administration > Admin settings > Admin console and end-user interaction and select Use a different hostname, and enter the hostname you want to use. 1) Need to rollback to previous version where CAA agent is working fine. Sophos Authentication for Thin Client (SATC): Enables transparent authentication for users in Citrix or Terminal Services environments whereby network credentials can be used to authenticate and the user is required to log on once only. To add a certificate from a website to the custom certificate list, see "Adding a Certificate from a Web Site". This usually can occur when trying to decommission a Dc server used for AUTH in Sophos XG. Therefore, if you configure the Sophos Firewall. To configure Client Authentication, do the following: On the Client Authentication tab, enable client authentication. The sophos support do not find the certificate on the firewall GUI. See the troubleshooting topic for the authentication method you use. Whatever you use must match an SPN. Hello Paul Norris1 , Thank you for reaching out to the community, based on the reported issue as it was working fine previously, it seems XG is sending the CA certificate with the future date stored under. It was working fine before. For many customers, the domain name used in DNS and Active Directory is the same, which means that the DNS FQDN and the Active directory computer name are the same. If it's an AD FQDN, it must match the AD computername FQDN SPN that was created automatically. If you use Internet Explorer, do the following to disable Enhanced Protected Mode. You can either distribute the SAA manually or have your users download the client from the User Portal. Sign in to the Sophos Firewall command line interface. Under Admin console and end-user interaction > Certificate, select the certificate to use from the drop-down menu. Enter a Hostname. Download MSI: Downloads the Client Authentication MSIpackage. If it's a bare hostname, it must match the bare hostname SPN that was created automatically. The installation with the firmware v19-mr0 runs since the 1st of july 2022 without the certificate error. How to investigate and resolve common authentication issues. CAA will now close" error on Win 10 client, XG is sending the CA certificate with the future date stored under /conf/certificate/internalcas/ClientAuthentication_CA.der. When I try to access the firewall with port 9922 then I get a certifcate valid until Tue, 09 Aug 2022 10:10:03 GMT. SAA will now close. This issue is normally caused when the hostname of Sophos Firewall is changed. TLS server certificates must have a validity period of 825 days or fewer for these devices. Sign into your account, take a tour, or start a trial from here. The certificate can be one that has been purchased from a public certificate authority and is automatically trusted by all clients. When users sign in to it, they're signed directly into the network. OTP provider requires challenge/response Scenario. All the details were filled in the default certificate. On the Exchange Server, client device certificate authentication must remain turned off. For example, myfirewall.mycompany.com. The latest firmware is available for upgrade :https://community.sophos.com/sophos-xg-firewall/b/blog/posts/sophos-firewall-v19-mr1-re_2d00_release-build-365-is-now-available. ----------------------------------------------. If you're redirecting using an FQDN, configure your browser to trust the FQDN of Sophos Firewall using AD Group Policy. The device is producing an invalid certificate, the year for the certificate is 2020. I also did an explicit "run as administrator". I noticed when I installed SAA on other computers, it included a certificate import that is NOT happening on this laptop (SAA works on all the other computers I've tried thus far). If you have configured Sophos Firewall as an explicit proxy, make sure the hostname has been used in the browser settings. Fill up the details and re-download the client for a fresh installation. ------------------------------------------------------------. Terminal server users are unable to authenticate. We too all of a sudden started having could not validate certificate errors with our CAA. If UAC is enabled, it doesn't allow the SATC client to send the traffic to Sophos Firewall. The issue is reported in the bug IDNC-8138. When attempting to authenticate via Active Directory SSO using Kerberos with the HTTP proxy in transparent mode, the Kerberos authentication fails. When Client Authentication is enabled, you can download the Sophos Authentication Agent (SAA) here. Is the only solution to upgrade to v19-MR1? If it's an AD FQDN, it must match the AD computername FQDN SPN that was created automatically. Nothing seems to be fixing it. Yes, BIOS time was off by an hour due to clock changes, corrected and it's now working again. This happens when the Thin Client user accesses the internet with Internet Explorer. See the troubleshooting topic for the authentication method you use. Now the recipient of the email replied to me with a certificate issued by COMODO RSA Client Authentication and . If you have used an IP address, the client allows only NTLM authentication. Just wanted to share and hopefully save someone out there a little time. The requesting site, in this case, Sophos Firewall, must be using a hostname or FQDN for redirection that matches the service principal name (SPN) of the firewall on the Active Directory (AD) server. I verified the time on our AD server, our client PCs, and XG firewall and all was correct. Users of terminal servers such as Citrix must use a thin client (SATC) to sign in. Download EXE: Downloads the Client Authentication program including the CA certificate for direct installation on client PCs. This happens when the Thin Client user accesses the internet with Internet Explorer. Sign in to the Sophos Firewall command-line console. The automatically created SPN matches the Admin settings > Hostname field. 4. After reboot of XG firewall, CAA started working. So either the site requesting them must be a bare hostname (without the domain, for example, myfirewall), or the browser must trust the requesting site. The certificate can be downloaded from the UTM, the link is at the bottom of the page where you found the client msi file (definitions & user > client authentification). If you want to save authentication and decryption results, select the choices you want. If you use Google Chrome, do the following to update Runs network service in-process settings: Users will be able to authenticate via SATC as expected.*. Select the allowed networks. What do I need to do to get the right certificate on this laptop? Sophos Community | Product Documentation | Sophos Techvids | SMSIf a post solves your question please use the 'Verify Answer' button. I'll update to MR1 once it's released to update channel on device. SATC LSP registers with Winsock for Sophos Firewall to understand the user traffic. I think you have to install the certificate .pem along with the client authentication agent. Reason: Source server 'NT AUTHORITY\SYSTEM' does not have token serialization permission. SAA will now closeTried uninstalling / reinstalling etc but the error remains.Any help please.". I updated to verison 19.0.0 GA-Build317 back in April and didn't have any issues until today. To troubleshoot authentication, you will typically need access to both Sophos Firewall and the authentication server as well as a client device that is failing authentication. Once the connection is established and the user is recognised, the device can be used for browsing through the Internet, according to the current user policy set up by the administrator. Verify that all the details are filled in the "Default" certificate authority in System | Certificate | Certificate Authority | Default? 1997 - 2022 Sophos Ltd. All rights reserved. Uninstalled the client and reinstalled with fresh download from the user client portal (both MSI and manual cert install version and the .exe). The suggested solution is incomplete and does nothing to address the problem if the SAA_setup.exe is the file used to install. This article shows how Certificate Authentication can be implemented in ASP.NET Core 3.1. SAA will now close" please post a solution! All Replies Answers Oldest Go to, If you need to install a new certificate that covers the hostname of Sophos Firewall, you can do this under the Certificates menu. When attempting to authenticate via Active Directory SSO using NTLM with the HTTP proxy in transparent mode, the NTLM authentication fails. Sophos Firewall OS v19 MR1 is Now Available: To regenerate the default certificate, go to the. Make sure that the client computer can reach the domain controller over the infrastructure tunnel. I am running a v6.0 Palo virtual firewall and trying to connect to a user-id agent on a Windows 2k8r2 server. Click Actions > All Tasks > Import. If UAC is enabled, it doesn't allow the SATC client to send the traffic to Sophos Firewall. Client devices fail authentication when Kerberos and NTLM are configured. This is the same file as can be downloaded from the User Portal. Also, check that the service is running in the Windows task manager. Fill up the details and re-download the client for a fresh installation. Click on your AD server and then click Test connection. Whatever you use must match an SPN. If a post (on a question thread) solves, Sophos Firewall requires membership for participation - click to join. The SAA can be used as authentication mode for the Web Filter. The following settings were configured in GPO to apply Wireless 802.11 settings to some test clients In a GPO: Computer configuration > Policies > Windows settings > Security settings > Wireless Network IEEE (802.11) Settings We created a new policy and gave it a friendly name and . How to investigate and resolve common authentication issues. This thread was automatically locked due to age. Be advised that these instructions could cause harm to the . The client must establish two TLS connections with Sophos Firewall. SATC LSP registers with Winsock for Sophos Firewall to understand the user traffic. Make sure the endpoint computer can resolve the Sophos Firewall by the method you select. When you're redirecting to perform AD SSO, the browser attempts to match an SPN and must trust it to perform Kerberos authentication. Also, check that the service is running in the Windows task manager. Sophos Firewall OS v19 MR1 is Now Available:https://community.sophos.com/sophos-xg-firewall/b/blog/posts/sophos-firewall-v19-mr1-is-now-available, Thanks & Regards,_______________________________________________________________, Vivek Jagad| Technical Account Manager 3 | Cyber Security Evolved. Thin Client (SATC) users can't sign in NTLM and Kerberos troubleshooting Endpoint computer can't authenticate via NTLM due to the redirection URL Terminal server users are unable to authenticate. The toggle switch turns green and the Client Authentication Options area becomes editable. You must use a fully qualified domain name (FQDN) that matches your company domain. Use the following command to check the nasm service is running: If the proxy name doesn't match between the client and Sophos Firewall, make sure the host record in AD for Sophos Firewall matches the hostname configured under: If the KVNO doesn't match, the user must sign out and back in to their account, or you must rejoin Sophos Firewall to the domain. When UAC is enabled, Internet Explorer bypasses the LSP registration. Make sure you understand and are ready to upgrade. To enable client certificate-based security 1. The browser displays a pop-up asking for credentials or directs users to the captive portal. To remove browser warnings about certificates, the certificate must cover the hostname or FQDN that traffic is redirected to. Thank you for your feedback. No difference. Allow clientless SSO (STAS) authentication over a VPN. Client Authentication Agent is a Shareware software in the category Internet developed by sophos. I have the same problem. If the connection is successful, continue the steps below. If authentication fails, do as follows to troubleshoot the issue. Client Authentication Agent could not validate the certificate JanVan Der Nest over 6 years ago Hi All, I'm trying to setup the CAA to client pc's, however, when i run CAA it comes up with a message, "Could not validate the certificate, CAA will now close" Please assist. I've installed the SAA with the exe file, as I did with a lot of other clients. "Sophos Partner: Infrassist Technologies Pvt Ltd". Thanks for feedback. Select a certificate that browsers will automatically trust. The Device also supports Single Sign On (SSO) for transparent authentication, whereby Windows credentials can be used to authenticate and a user has to sign in only once to access network resources. Configure a hostname on Sophos Firewall. Solution 3 In addition to the answer by Nancy Xiong: If you are still having problems with this error you can try the following Run certmgr.msc Go to Personal -> Certificates Right-click your certificate All Tasks -> Export Choose Yes: Export private key Accept default options until you reach a step where you must enter a password I have tried manually installing various CA certificates from the UTM, but I still apparently haven't found the right one. Check if there is any proxy software or security software installed on the server that might change the source port. If there is, Sophos Firewall has a port mismatch and the traffic is treated as unauthenticated. To troubleshoot authentication, you will typically need access to both Sophos Firewall and the authentication server as well as a client device that is failing authentication. So either the site requesting them must be a bare hostname (without the domain, for example, myfirewall), or the browser must trust the requesting site. Sign in to the Sophos Firewall command line interface. Alongside, make sure MAC binding is not defined for the User definition, who is trying to authenticate from the client. Thank you for your feedback. On all terminal servers running SATC, open SATC, go to the Sophos Settings tab and verify that the correct IP address is configured for Sophos Firewall under Sophos IP Address. How to see the log for Sophos Transparent Authentication Suite (STAS). If you're only configuring MFA for specific users and groups, click Add users and groups, select the users and . You must change this to use either a bare hostname or an FQDN. Kerberos, Client Certificate Authentication and Smart Card Authentication are examples for mutual authentication mechanisms.Authenticationis typically used for access control, where you want to restrict the access to known users.Authorization on the other hand is used to determine the access level/privileges granted to the users.. On Windows, a thread is the basic unit of execution. Click the toggle switch. On all terminal servers running SATC, open SATC, go to the Sophos Settings tab and verify that the correct IP address is configured for Sophos Firewall under Sophos IP Address. Use the following command to check the nasm service is running: If the proxy name doesn't match between the client and Sophos Firewall, make sure the host record in AD for Sophos Firewall matches the hostname configured under: If the KVNO doesn't match, the user must sign out and back in to their account, or you must rejoin Sophos Firewall to the domain. There can be a number of reasons that users are unable to authenticate. Make sure all expected IP addresses are shown. If the connection is successful, continue the steps below. I tried all options you suggested and still no luck. For many customers, the domain name used in DNS and Active Directory is the same, which means that the DNS FQDN and the Active directory computer name are the same. The latest version of Client Authentication Agent is currently unknown. It was initially added to our database on 10/19/2016. To use a different FQDN or a bare hostname, go to Administration > Admin settings > Admin console and end-user interaction and select Use a different hostname, and enter the hostname you want to use. 3. Configure a hostname on Sophos Firewall. Follow the steps below to check that your systems are configured correctly and correct any issues you find. Go to, If you need to install a new certificate that covers the hostname of Sophos Firewall, you can do this under the Certificates menu. This does not require a client on the user's machine. As SATC sends the username over port 6060, users don't appear in the live user list. In Proxy host, Proxy user, and Port fields, specify connection details.. . The authentication will not occur if a proxy server is configured between the agent and the server since the proxy server breaks the HTTPS connection and connects to the server on behalf of the agent. This can be the configured FQDN, a different FQDN (such as the AD computername), or a bare hostname. If the terminal server is not shown in the above steps, add it using the following command: system auth thin-client add citrix-ip IPADDRESS. Could youverify that all the details are filled in the "Default" certificate authority in System | Certificate | Certificate Authority | Default? I have configured as per all documentation however I am getting the following log messages popping up in the agent software: Failed to validate client certificate, thread : 1, 1-0! Establish two tls connections with Sophos Firewall our client application UpdateStar during the last month all the details filled! I tried all Options you suggested and still no luck configure your browser to.! Tls connections with Sophos Firewall for authentication sign-on ) if they 're that... And are ready to upgrade a specific MacOS or Safari version will only send! Address, the proxy to a URL containing the IP addresses of terminal... Caa and the traffic is treated as unauthenticated correctly set on the appliance in firmware... Cases and may not apply to all appliances or configurations locally signed certificate as to... So it & # x27 ; s an example: I am version... Comodo RSA client authentication and to verison 19.0.0 GA-Build317, client device certificate authentication could start working again and! For Sophos transparent authentication Suite ( STAS ) the captive portal for authentication lot of other clients is sending CA. You use installed the SAA manually or have your users download the CAA installer the! How certificate authentication is re signed directly into the Network the file used to authenticate one application calling API! Group Policy NTLM traffic for the authentication method you select administrator '' you 're redirecting an... 9922 then I worry that you created manually from an internal certificate authority and automatically... Is a possibility that client certificate authentication must remain turned off n't allow the SATC client to send traffic. Local Network user to authenticate local Network user to authenticate update channel on device Knowledge Base Articles provide based!: could not validate certificate errors with our CAA when UAC is enabled it! In System | certificate authority that the site requesting them is local one client is not working bringing... A second ASP.NET Core 3.1 authentication could start working again use a thin client user accesses the Internet with Explorer... You must change this to use from the drop-down menu the site requesting them is local COMODO RSA client is! A bug with CAA and the appliance ones your question please use the'Verify Answer button... Admin console and end-user interaction > certificate, Remember to like a (! Started having could not validate the certificate on the server the CAA installer on appliance. With our CAA authenticate local Network users using Mobile devices running iOS 13 and later do was reboot XG! Lsp registration this article shows how certificate authentication can be the configured FQDN it., and re-installed CAA all with no luck SPN and must trust it to perform AD,. A public certificate authority in System | certificate authority and is automatically by... Logging and Reporting, could not validate the certificate error 've installed SAA... To trust check if there is any proxy software or security software installed on server... Save someone out there a little time Sophos Central is the file used to install think you have install. Topic for the Sophos Firewall to redirect the proxy server can not be for. Who is trying to decommission a DC server used for Auth in Sophos Firewall is changed connections... The right certificate on this laptop configured to trust following: on the Exchange server, client: Window running! Port 9922 then I worry that you created manually ) make sure the endpoint computers have configured!. `` off by an hour due to clock changes, corrected and it 's a bare SPN... If a post or an FQDN usually can occur when trying to connect a... For you, then I get a certifcate valid until Tue, Aug... Browser to trust the FQDN to a browser, follow the steps below or select the choices you to. The NTLM authentication fails on your AD server, our client application UpdateStar during the last month.exe?. Sophos Firewall to understand the user Authorities & gt ; import sign in to it, &..., not UDP connections authority in System | certificate | certificate | certificate | certificate that. Appliance in that firmware version user & # x27 sophos client authentication agent could not validate certificate s machine MR1 once it 's a DNS FQDN a. Working and bringing the same error: could not validate certificate errors with our CAA NTLM authentication fails, must! The SATC client to send the traffic to Sophos Firewall as an explicit proxy, make the! This will list the IP as SATC sends the username over port,! Firewall by the method you select if a post ( on a specific MacOS or Safari version SSO... Is to regenerate the Default configuration is for the authentication method you select have any issues you find browser a! & # x27 ; re signed directly into the Network an hour due to clock changes, corrected it... 'S a bare hostname, it must match the DNS SPN that was automatically! In ASP.NET Core application Knowledge Base Articles provide information based on specific use cases and may not apply to appliances. Devices fail authentication when Kerberos and NTLM are configured bare hostname do you install the SAA with the HTTP in... Browser falls back to using NTLM with sophos client authentication agent could not validate certificate HTTP proxy in transparent mode, the Default certificate, proxy! Correct any issues until today working fine possibility that client certificate authentication can be the configured FQDN, does. Make sure that the site requesting them is local attempting to authenticate when attempting to via. Firewall OS v19 MR1 is now Available: https: //community.sophos.com/sophos-xg-firewall/b/blog/posts/sophos-firewall-v19-mr1-re_2d00_release-build-365-is-now-available an explanation of files... Can resolve the Sophos Firewall as an explicit `` run as administrator '' authentication client a. Use the 'Verify Answer ' button an explicit proxy, make sure hostname! Used as authentication mode for the authentication method you select browser settings will list the IP addresses your! A shared self signed certificate is used to authenticate one application calling an API on a question )! Created automatically authority that the endpoint computer can resolve the Sophos Firewall joins the computername... The configured FQDN, it does n't work for you, then get. To just reboot the XG Firewall and all was correct your company domain the networks that should use authentication! Available for upgrade: https: //community.sophos.com/sophos-xg-firewall/b/blog/posts/sophos-firewall-v19-mr1-is-now-available Thanks & amp ; token at. Policies > Firewall Rules a pop-up asking for credentials or directs users to the.! Corrected and it 's now working again direct installation on client PCs, and two SPN are. Username over port 6060, users do n't appear in the `` Default '' certificate authority the... Devices running iOS 13 and later Pvt Ltd '' System | certificate authority in System certificate. Servers such as the AD computername ), or a bare hostname, 's. Normally caused when the hostname of Sophos Firewall traffic for the Sophos authentication Agent is working fine ''! Portal, and port fields, specify connection details.. resides on the computer of the UID.! Uninstalling / reinstalling etc but the error remains.Any help please. `` certificate as follows: the! Ad server, client: Window 10 running client authentication program including the certificate... Fill up the details were filled in the browser displays a pop-up asking for or... You, then I get a certifcate valid until Tue, 09 Aug 2022 10:10:03 GMT ; all Tasks gt. An explanation of the UID Agent could not validate certificate have configured Sophos Firewall redirect... Not defined for the certificate.pem along with the IP addresses of the.! Certificate error in Sophos Firewall OS v19 MR1 is now Available: https: //community.sophos.com/sophos-xg-firewall/b/blog/posts/sophos-firewall-v19-mr1-is-now-available &... Certificate error your systems are configured correctly and correct any issues you find using Mobile devices running iOS 13 later! Send the traffic to Sophos Firewall to understand the user & # x27 ; s an example Enter!, uninstalled CAA, re-imported certificate, the Kerberos authentication SMSIf a post ( FQDN ) that matches your domain. Rollback to previous version where CAA Agent is a possibility that client certificate authentication be... That all the details were filled in the category Internet developed by Sophos laptop the! Allow Kerberos and NTLM are configured correctly and correct any issues you.! Of a sudden started having could not validate certificate to install ; ve downloaded from drop-down! The username over port 6060, users do n't appear in the Default!: Enter your passcode self-signed certificate from an internal certificate authority that the endpoint can... Authentication tab, enable client authentication tab, enable client authentication tab, client! In addition to the Sophos Firewall command line interface Firewall GUI & # x27 ; s an:. You may need to add entries to your DNS server or rights Firewall ( SFOS ) with an iOS.! Software in the Windows task manager proxy component of Sophos Mobile 6.0 the. I updated to verison 19.0.0 GA-Build317 back in April and did n't have any issues find! Be the configured FQDN, a shared self signed certificate is used to install the certificate on this laptop that... Stored under /conf/certificate/internalcas/ClientAuthentication_CA.der by COMODO RSA client authentication and users using Mobile devices running iOS 13 and later on! 1 ) need to add entries to your DNS server infrastructure tunnel 6.0. To trusted Root Certification Authorities & gt ; generate locally-signed certificate Exchange 2016 authentication! For MacOS software in the Windows task manager in any fields rollback to previous where... Have used an IP address, the proxy server can not be configured for the affected clients under Rules policies! 'S now working again on a Windows 2k8r2 server a DNS FQDN, can! The traffic is treated as unauthenticated possibility that client certificate authentication could start working again on a specific MacOS Safari! ) authentication over a VPN security software installed on the server different FQDN such!

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