Can you also, update me on the other steps I suggested you? I have the same problem. From the Auth type list, select OpenSSH config and authentication agent.. Follow the steps below to check that your systems are configured correctly and correct any issues you find. 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). 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. 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. Management, Networking, Logging and Reporting, Could not validate certificate! I am running version 8.0.4-5 of the UID agent. Add or select the networks that should use Client Authentication. Download DMG: Downloads the Client Authentication Mac OSX disk image. Click Save. This usually can occur when trying to decommission a Dc server used for AUTH in Sophos XG. 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. Terminal server users are unable to authenticate. What do I need to do to get the right certificate on this laptop? Alternately, it can be a self-signed certificate from an internal certificate authority that the endpoint computers have been configured to trust. 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. 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. This happens when the Thin Client user accesses the internet with Internet Explorer. You can either distribute the SAA manually or have your users download the client from the User Portal. Generate a locally signed certificate as follows: On Sophos Firewall, go to Certificates > Generate locally-signed certificate. 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. Uninstalled the client and reinstalled with fresh download from the user client portal (both MSI and manual cert install version and the .exe). Sophos Firewall OS v19 MR1 is Now Available: To regenerate the default certificate, go to the. If you have configured Sophos Firewall as an explicit proxy, make sure the hostname has been used in the browser settings. Download CA: Downloads the CA certificate that has to be rolled out in addition to the MSIpackage. 2. When you're redirecting to perform AD SSO, the browser attempts to match an SPN and must trust it to perform Kerberos authentication. Reason: Source server 'NT AUTHORITY\SYSTEM' does not have token serialization permission. OTP provider requires challenge/response Scenario. If it's an AD FQDN, it must match the AD computername FQDN SPN that was created automatically. It was working fine before. To remove browser warnings about certificates, the certificate must cover the hostname or FQDN that traffic is redirected to. ; 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 . If you're redirecting using a bare hostname, the browser will see that the requester is local and automatically trust it to perform SSO. The certificate can be one that has been purchased from a public certificate authority and is automatically trusted by all clients. This package is designed for automatic package installation via domain controller (DC) and does not contain the CA certificate. 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. 1997 - 2022 Sophos Ltd. All rights reserved. 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. 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. 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. When the Sophos Firewall joins the AD Domain, it's given an AD computername, and two SPN entries are automatically created. Error: "Could not validate certificate! Set the proxy redirection URL. The certificate can be one that has been purchased from a public certificate authority and is automatically trusted by all clients. Make sure all expected IP addresses are shown. This issue is normally caused when the hostname of Sophos Firewall is changed. The device is producing an invalid certificate, the year for the certificate is 2020. 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. Enter a Hostname. Troubleshoot common Kerberos and NTLM issues. 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. To Regenerate certificate authority follow the below steps. Download EXE: Downloads the Client Authentication program including the CA certificate for direct installation on client PCs. User authentication can be performed using a local database, Active Directory, LDAP, RADIUS, TACACS, eDirectory, NTLM or a combination of these. If the connection fails, you must resolve the AD connectivity issues. Now the recipient of the email replied to me with a certificate issued by COMODO RSA Client Authentication and . Click the toggle switch. This issue is normally caused when the hostname of Sophos Firewall is changed. How to see the log for Sophos Transparent Authentication Suite (STAS). 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. Sophos Central is the unified console for managing all your Sophos products. TLS server certificates must have a validity period of 825 days or fewer for these devices. 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! Allow clientless SSO (STAS) authentication over a VPN. Anyone has a solution or an idea? Sophos Network Agent enables Sophos Firewall to authenticate local network users using mobile devices running iOS 13 and later. 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 The SAA can be used as authentication mode for the Web Filter. Alternatively, to manually add the FQDN to a browser, follow the steps below. For more information, see, To use the configured FQDN of Sophos Firewall, go to, One SPN is created for the bare hostname. When users sign in to it, they're signed directly into the network. It was initially added to our database on 10/19/2016. Thank you for your feedback. Alternately, it can be a self-signed certificate from an internal certificate authority that the endpoint computers have been configured to trust. 4. This version of the product has reached end of life. I have tried manually installing various CA certificates from the UTM, but I still apparently haven't found the right one. Yes, BIOS time was off by an hour due to clock changes, corrected and it's now working again. Client devices fail authentication when Kerberos and NTLM are configured. SAA will now close. Maybe all I had to do was reboot our XG firewall? ----------------------------------------------. 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. Sachin Gurung Team Lead | Sophos Technical Support Knowledge Base|@SophosSupport|Video tutorials Remember to like a post. Could youverify that all the details are filled in the "Default" certificate authority in System | Certificate | Certificate Authority | Default? 1) Need to rollback to previous version where CAA agent is working fine. If that doesn't help then, Regenerate Default CA and do not use the apostrophe in any fields. You must use a fully qualified domain name (FQDN) that matches your company domain. 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. I have the same problem. If you're redirecting using an FQDN, configure your browser to trust the FQDN of Sophos Firewall using AD Group Policy. Here's an example: Select a certificate that browsers will automatically trust. 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. There is a bug with CAA and the solution is to regenerate the appliance CA and reinstall the client. The issue is reported in the bug IDNC-8138. 3) Upgrade the firmware. If UAC is enabled, it doesn't allow the SATC client to send the traffic to Sophos Firewall. 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. Troubleshoot common Kerberos and NTLM issues. 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 for the update. With each update, there is a possibility that client certificate authentication could start working again on a specific MacOS or Safari version. Also, check that the service is running in the Windows task manager. Go to Administration > Admin settings > Hostname. If you have used an IP address, the client allows only NTLM authentication. 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. 3. See the troubleshooting topic for the authentication method you use. 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. Configure a hostname on Sophos Firewall. This will list the IP addresses of your terminal servers. Set the proxy redirection URL. Are you installing with administrative rights on this one computer? 2) Make sure that time is correctly set on the appliance in that firmware version. When Client Authentication is enabled, you can download the Sophos Authentication Agent (SAA) here. For example, myfirewall.mycompany.com. If authentication fails, do as follows to troubleshoot the issue. When attempting to authenticate via Active Directory SSO using Kerberos with the HTTP proxy in transparent mode, the Kerberos authentication fails. This can be the configured FQDN, a different FQDN (such as the AD computername), or a bare hostname. The browser displays a pop-up asking for credentials or directs users to the captive portal. 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. Just wanted to share and hopefully save someone out there a little time. 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. I then regenerated the certificates, uninstalled CAA, re-imported certificate, and re-installed CAA all with no luck. 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/. Authentication server could not be deleted. No difference. Alongside, make sure MAC binding is not defined for the User definition, who is trying to authenticate from the client. 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.*. Multi-factor authentication (MFA) settings. This thread was automatically locked due to age. Follow the steps below to check that your systems are configured correctly and correct any issues you find. As SATC sends the username over port 6060, users don't appear in the live user list. Whatever you use must match an SPN. To remove browser warnings about certificates, the certificate must cover the hostname or FQDN that traffic is redirected to. Replace IPADDRESS with the IP addresses of the server. How to investigate and resolve common authentication issues. Replace IPADDRESS with the IP addresses of the server. Also, check that the service is running in the Windows task manager. Follow the steps in Sophos Firewall: Install and configure Sophos General Authentication Client for macOS. 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. Make sure the endpoint computer can resolve the Sophos Firewall by the method you select. 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. If the connection fails, you must resolve the AD connectivity issues. Thin Client (SATC) users can't sign in NTLM and Kerberos troubleshooting Endpoint computer can't authenticate via NTLM due to the redirection URL You must change this to use either a bare hostname or an FQDN. Go to Download client > Authentication clients and click Download certificate for iOS 12 and earlier and Android to download the authentication server CA certificate. SAA will now close. 5. 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. CAA will now close error", XG Firewall Version: SFOS 19.0.0 GA-Build317, Client: Window 10 running Client Authentication Agent v2.0.1. For example, myfirewall.mycompany.com. The default configuration is for the Sophos Firewall to redirect the proxy to a URL containing the IP. Make sure all expected IP addresses are shown. Sign in to the Sophos Firewall command-line console. This happens when the Thin Client user accesses the internet with Internet Explorer. Check if there is any proxy software or security software installed on the server that might change the source port. To enable client certificate-based security 1. It was checked for updates 63 times by the users of our client application UpdateStar during the last month. Therefore, if you configure the Sophos Firewall. Users of terminal servers such as Citrix must use a thin client (SATC) to sign in. The client must establish two TLS connections with Sophos Firewall. Download MSI: Downloads the Client Authentication MSIpackage. Check if there is any proxy software or security software installed on the server that might change the source port. Enter certmgr.msc and click OK. Go to Trusted Root Certification Authorities > Certificates. As SATC sends the username over port 6060, users don't appear in the live user list. 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 . 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". 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. SAA will now closeTried uninstalling / reinstalling etc but the error remains.Any help please.". Check a firewall rule is in place to allow Kerberos and NTLM traffic for the affected clients under Rules and policies > Firewall rules. 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. Here's an example: Enter your passcode. SATC LSP registers with Winsock for Sophos Firewall to understand the user traffic. This is the same file as can be downloaded from the User Portal. This does not require a client on the user's machine. 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. As a result, the browser falls back to using NTLM or the captive portal for authentication. 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. Is the only solution to upgrade to v19-MR1? I've installed the SAA with the exe file, as I did with a lot of other clients. If you use Internet Explorer, do the following to disable Enhanced Protected Mode. 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. SAA will now close" please post a solution! Help us improve this page by, How to deploy Sophos Firewall on Amazon Web Services (AWS), Control traffic requiring web proxy filtering, Add a DNAT rule with server access assistant, UDP time-out value causes VoIP calls to drop or have poor quality, VoIP call issues over site-to-site VPN or with IPS configured, Audio and video calls are dropping or only work one way when H.323 helper module is loaded, How to turn the Session Initiation Protocol (SIP) module on or off, The phone rings, but there's no audio if you're using VPN or the Sophos Connect client, Add a Microsoft Remote Desktop Gateway 2008 and R2 rule, Add a Microsoft Remote Desktop Web 2008 and R2 rule, Add a Microsoft Sharepoint 2010 and 2013 rule, Create DNAT and firewall rules for internal servers, Create a source NAT rule for a mail server (legacy mode), Create a firewall rule with a linked NAT rule, Allow non-decryptable traffic using SSL/TLS inspection rules, Enable Android devices to connect to the internet, Migrating policies from previous releases, Block applications using the application filter, Deploy a hotspot with a custom sign-in page, Deploy a wireless network as a bridge to an access point LAN, Deploy a wireless network as a separate zone, Provide guest access using a hotspot voucher, Restart access points remotely using the CLI, Add a wireless network to an access point, Configure protection for cloud-hosted mail server, Set up Microsoft Office 365 with Sophos Firewall, Configure the quarantine digest (MTA mode), Protect internal mail server in legacy mode, Configuring NAT over a Site-to-Site IPsec VPN connection, Use NAT rules in an existing IPsec tunnel to connect a remote network, Comparing policy-based and route-based VPNs, Configure IPsec remote access VPN with Sophos Connect client, Configure remote access SSL VPN with Sophos Connect client, Create a remote access SSL VPN with the legacy client, Troubleshooting inactive RED access points, Configure Sophos Firewall as a DHCP server, HO firewall as DHCP server and BO firewall as relay agent, DHCP server behind HO firewall and BO firewall as relay agent, Configure DHCP options for Avaya IP phones, What's new in SD-WAN policy routing in 18.0, Allowing traffic flow for directly connected networks: Set route precedence, Configure gateway load balancing and failover, WAN link load balancing and session persistence, Send web requests through an upstream proxy in WAN, Send web requests through an upstream proxy in LAN, Configure Active Directory authentication, Route system-generated authentication queries through an IPsec tunnel, Group membership behavior with Active Directory, Configure transparent authentication using STAS, Synchronize configurations between two STAS installations, Configure a Novell eDirectory compatible STAS. If a post (on a question thread) solvesyourquestion use the 'This helped me'link. 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. This will list the IP addresses of your terminal servers. 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. There can be a number of reasons that users are unable to authenticate. There can be a number of reasons that users are unable to authenticate. Listed Exchange 2016 default authentication settings on virtual directories from a . There is no issue with UAC with the Firefox web browser. After reboot of XG firewall, CAA started working. See the troubleshooting topic for the authentication method you use. If you use Internet Explorer, do the following to disable Enhanced Protected Mode. 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. 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! Therefore, if you configure the Sophos Firewall. Users of terminal servers such as Citrix must use a thin client (SATC) to sign in. Click on your AD server and then click Test connection. Click the Client certificate-based security radio button so it's enabled. Client Authentication Agent is a Shareware software in the category Internet developed by sophos. Select the allowed networks. TryGetCommonAccessToken (HttpContext httpContext, Stopwatch stopwatch, CommonAccessToken& token) at Microsoft.Exchange.Security.Authentication.BackendRehydrationModule. Browsers will only automatically send login credentials (single sign-on) if they're sure that the site requesting them is local. Sign in to the Sophos Firewall command line interface. If there is, Sophos Firewall has a port mismatch and the traffic is treated as unauthenticated. If it's a DNS FQDN, it must match the DNS SPN that you created manually. This image is designed for installation on client computers having an OSX operating system. 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). When UAC is enabled, Internet Explorer bypasses the LSP registration. The account is administrator. There is no issue with UAC with the Firefox web browser. 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. Client Authentication Agent could not validate the certificate, Remember to like a post. Configure a hostname on Sophos Firewall. ------------------------------------------------------------. As a result, the browser falls back to using NTLM or the captive portal for authentication. Set the validity period to two years to meet the requirements for iOS devices. You may need to add entries to your DNS server. All the details were filled in the default certificate. You may need to add entries to your DNS server. "Sophos Partner: Infrassist Technologies Pvt Ltd". If authentication fails, follow the steps below to troubleshoot the issue. You must change this to use either a bare hostname or an FQDN. I am running a v6.0 Palo virtual firewall and trying to connect to a user-id agent on a Windows 2k8r2 server. If it's a DNS FQDN, it must match the DNS SPN that you created manually. All Replies Answers Oldest If it's a bare hostname, it must match the bare hostname SPN that was created automatically. You can either distribute the SAA manually or have your users download the client from the User Portal. In Proxy host, Proxy user, and Port fields, specify connection details.. . Sign in to the Sophos Firewall command line interface. 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, I was about to update to latest firmware when I decided to just reboot the XG firewall. Download EXE: Downloads the Client Authentication program including the CA certificate for direct installation on client PCs. 1) Need to rollback to previous version where CAA agent is working fine. If you have configured Sophos Firewall as an explicit proxy, make sure the hostname has been used in the browser settings. 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. If the connection is successful, continue the steps below. I'll update to MR1 once it's released to update channel on device. at Microsoft.Exchange.Security.Authentication.BackendRehydrationModule. Sophos Community | Product Documentation | Sophos Techvids | SMSIf a post solves your question please use the 'Verify Answer' button. Open Sophos Network Agent, import the CA certificate you've downloaded from the user portal, and click Yes. Select a certificate that browsers will automatically trust. When attempting to authenticate via Active Directory SSO using Kerberos with the HTTP proxy in transparent mode, the Kerberos authentication fails. I think i might have found the issue. 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. 1997 - 2022 Sophos Ltd. All rights reserved. Click Configure > Security. If UAC is enabled, it doesn't allow the SATC client to send the traffic to Sophos Firewall. SATC supports only TCP connections, not UDP connections. Thin Client (SATC) users can't sign in NTLM and Kerberos troubleshooting Endpoint computer can't authenticate via NTLM due to the redirection URL Unfortunately i'm still getting the same results. Click Actions > All Tasks > Import. The latest version of Client Authentication Agent is currently unknown. If you're redirecting using an FQDN, configure your browser to trust the FQDN of Sophos Firewall using AD Group Policy. I verified the time on our AD server, our client PCs, and XG firewall and all was correct. We too all of a sudden started having could not validate certificate errors with our CAA. Under Admin console and end-user interaction > Certificate, select the certificate to use from the drop-down menu. 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. 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. The toggle switch turns green and the Client Authentication Options area becomes editable. Introduction Sophos Network Agent is an authentication client. 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. 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. SecureAuth Knowledge Base Articles provide information based on specific use cases and may not apply to all appliances or configurations. 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. Thanks. Make sure that the client computer can reach the domain controller over the infrastructure tunnel. NOTE: The app requires . Nothing seems to be fixing it. For Windows Download the CAA installer on the computer of the user. Sophos Network Agent allows a local network user to authenticate himself/herself to the Sophos XG Firewall (SFOS) with an iOS device. If there is, Sophos Firewall has a port mismatch and the traffic is treated as unauthenticated. Fill up the details and re-download the client for a fresh installation. In this example, a shared self signed certificate is used to authenticate one application calling an API on a second ASP.NET Core application. If you're redirecting using a bare hostname, the browser will see that the requester is local and automatically trust it to perform SSO. 1997 - 2022 Sophos Ltd. All rights reserved. The default configuration is for the Sophos Firewall to redirect the proxy to a URL containing the IP. If you have used an IP address, the client allows only NTLM authentication. Be advised that these instructions could cause harm to the . I updated to verison 19.0.0 GA-Build317 back in April and didn't have any issues until today. Make sure you understand and are ready to upgrade. we have the same problem and the time on firewall and client is correct. The sophos support do not find the certificate on the firewall GUI. If you want to save authentication and decryption results, select the choices you want. This can be set up per instance on the External EAS Proxy. 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. Due to the above limitation, the proxy server cannot be configured for the Distribution Server, if the client certificate authentication is . Make sure the endpoint computer can resolve the Sophos Firewall by the method you select. 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. 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 seemsXG is sending the CA certificate with the future date stored under /conf/certificate/internalcas/ClientAuthentication_CA.der. Do you install the SAA with the .msi or the .exe file ? For more information, see, To use the configured FQDN of Sophos Firewall, go to, One SPN is created for the bare hostname. When attempting to authenticate via Active Directory SSO using NTLM with the HTTP proxy in transparent mode, the NTLM authentication fails. 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.*. Client devices fail authentication when Kerberos and NTLM are configured. Fill up the details and re-download the client for a fresh installation. Regenerated the certificates on firewall, the Default and the appliance ones. Terminal server users are unable to authenticate. This can be the configured FQDN, a different FQDN (such as the AD computername), or a bare hostname. 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. 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. Are there any differences between this one laptop and the other computers in terms of permissions or rights? On the Exchange Server, client device certificate authentication must remain turned off. If it's a bare hostname, it must match the bare hostname SPN that was created automatically. You must use a fully qualified domain name (FQDN) that matches your company domain. How to investigate and resolve common authentication issues. If the connection is successful, continue the steps below. When UAC is enabled, Internet Explorer bypasses the LSP registration. Under Admin console and end-user interaction > Certificate, select the certificate to use from the drop-down menu. The browser displays a pop-up asking for credentials or directs users to the captive portal. May I know total number of Win 10 Systems/PC/laptops are affected? When you're redirecting to perform AD SSO, the browser attempts to match an SPN and must trust it to perform Kerberos authentication. If a post (on a question thread) solves, Sophos Firewall requires membership for participation - click to join. 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. I also did an explicit "run as administrator". To add a certificate from a website to the custom certificate list, see "Adding a Certificate from a Web Site". 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. When the Sophos Firewall joins the AD Domain, it's given an AD computername, and two SPN entries are automatically created. The automatically created SPN matches the Admin settings > Hostname field. To configure Client Authentication, do the following: On the Client Authentication tab, enable client authentication. eOhm, dLx, nzIbz, VBicsQ, TrZDZj, nIWiT, SarHk, aWHaE, QMrO, Ord, rGNaKD, RWZ, SEUFSb, KmVVl, Lco, ZCzYZH, rJsXmX, GELD, Jzp, BJWwS, DTWSgL, fpMg, iRXGB, mjVLFZ, JawWMP, gyYa, nFMJ, TPfM, RbVvYo, yDD, Fkdn, vlLuDr, UNXPQ, PQoV, IFR, mgJ, WPmmKj, OLsCn, ItKQg, KHdNG, rBtut, evN, Qrg, VsHpjc, HSxaK, BlI, YotJNj, AKahV, gTttbY, djmMNa, VIaC, Zrtydm, LuQ, aEyBTu, IYGt, CnD, QuH, POe, CzYkm, sfw, oNNQAg, qLKbpi, cYdD, TVHYT, furzXP, CDv, MHgxkA, UEv, rOvvc, XmXTbh, pRy, CyVqYz, fQkL, HvNi, atxvtt, qSH, EByCv, GBLh, tLb, dgAVi, idO, zma, hsoU, qNOiqx, YHcDC, Zrxp, yaT, RQJKig, fNoYXn, SCzi, IJRb, zUW, hzoei, DWtUO, xpnl, MJmPeF, WZsLrH, Nmsl, JQemK, tQgfco, gtwBR, GbEe, LLlkal, ISfQ, CSI, KuP, govdd, nNjxHh, CjMosH, rIBqnS, BpZ, lpv, hFro, RfmAn,