- Check the SSL VPN port assignment. The above steps would help to identify the issues related to SSL-VPN tunnel disconnections. The idle-timeout is the period of time in seconds that the SSL-VPN will wait before timing out. I'm going to upgrade a few FTC's to 646 and see if that helps. Adjust it as per the requirement or disable it while testing. Choosing a mode of operation and applying the proper levels of security depends on your specific environment and requirements. We run the full FortiClient ver 6.2.7 and we use FortiToken. Go to Policy > IPv4 Policy or Policy > IPv6 policy . This site uses Akismet to reduce spam. This is kind of a new behaviour, previously we had a popup at 40% asking if we trusted the server. This article describes the behavior of FortiClient, when customers see many of ssl-exit-error and ssl-new-con events in VPN events log on FortiGate firewall. !time! Device Key in Log Message: LogRhythm Schema: Data Type: Schema Description: logid <vmid> Number: The ID (logid) is a 10-digit field. Below is an article on how to enable DTLS for SSL-VPN connections. Copyright 2022 Fortinet, Inc. All Rights Reserved. -> See if the end-user is connected using a Wired or Wireless connection on their network. Otherwise the connection will break. Recently I had an issue with a SSL VPN user who could not connect to the Fortigate. DH lib and connection not established. FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic. The problem can usually be solved by adjusting the host ornetworkfirewall rules on the client side. (-5)so i decided to add another post describing some of the most common errors that may come up when connecting to FortiGate with SSL VPN. Click the Reset button. Under the vpn ssl settings the algorithm is set to high.Could you please let me know if you got it fixed and what was the solution?THX! Might need to reduce the sslvpn algorithm from high to medium and test as well. !data! ssl-anomoly for Microsoft sites, 'untrusted'. We do have a lot of older FCs (6.2.7) and I'm slowing getting them upgraded. SSLVPN ssl-exit-error: DH lib -- "Host Check" problems Sorry, this post was deleted by the person who originally posted it. Log Type Event Log SSL VPN session Take a note of the "Web mode access will be listening at" URL as we will need this in the next section. The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.. Message ID 99841 From FortiClient machine ping test to FortiGate external interface (timestamp). !data! Introduction Before you begin What's new Log Types and Subtypes Type By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. -> Test with DTLS or TLS connections. Fortigate SSL VPN issues - Forticlient. I think these are failed connection attempts on port 443. br Bernhard ssl-exit-error on FortiGate for FortiClients with Reason as DH lib Since the start of 2022 I've been seeing frequent FortiClient sslvpn connection problems for users, me included. Use a test computer in the client's network with no other 3rd party applications if possible. Destination IP address for the web. Start a Wireshark packet capture on the client with the filter of FortiGate's public IP address on the wireless or ethernet interface. Copyright 2022 Fortinet, Inc. All Rights Reserved. Below are some of the things to keep in mind when working with SSL-VPN disconnection issues: -> Understand the scope of the issue, i.e. User1 was considered as login successfully after these 2 events: user logged successfully and the tunnel was established with tunnel IP address: 10.212.134.200. It is a unique identifier for that specific log. diagnose debug application sslvpn -1 diagnose debug enable The CLI displays debug output similar to the following: all come from different external source IPs. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site Range: <0> to <259200>. Start a Wireshark packet capture on the client with the filter of the internal machine's IP address on the SSL-VPN interface. we had the same issue today with Forticlient 7.0.2 and active Option to ignore invalid VPN server certificate. In the Fortinet documentation it states: '# diag debug crashlog read'. We have a cert from a Public CA on the gate so I dont think thats the issue. Before the actual login from user1 (Remote IP: 10.47.2.4), there were events of ssl-new-con and ssl-exit-error from user N/A. Provide a "diag debug app sslvpn -1" output. )&ping -n 2 a.a.a.a>nul". When disabling Option to ignore VPN server certificate the popup came and connection went fine, no DH Lib error.
!time! Create key and CSR for multi-domain certificate. !data! Check that the policy for SSL VPN traffic is configured correctly. FortiClient is compatible with Fabric-Ready partners to further strengthen enterprises' security posture. Had. To troubleshoot getting no response from the SSL VPN URL: - Go to VPN -> SSL-VPN Settings. In this case the problem would most of the time be with the extensive logging of the traffic and the events on the device. Messages action=exit ui= msg=SSL Exit Error: from What is an SSL VPN? We have the same messages - allready with 4.3.3 The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.. Sniff the ICMP packets on FortiGate for the internal machine's IP address that was started in step 8. It is a unique identifier for that specific log. The -1 debug level produces detailed results. I have many log entries in the event log stating ssl-exit-error. 07:34 AM. Learn how your comment data is processed. Technical Tip : SSL-VPN disconnection issues when . Don't forget to change the port on all VPN clients too. We run the full FortiClient ver 6.2.7 and we use FortiToken. Default value is 300 seconds (5 minutes). problems with the FortiGate device, in most of the time the device would be the problem and the problem would go away after the reboot of the FortiGate device, but would come again after the few days. It just keeps the session open. The VPN server may be unreachable. The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges. Go toC:\ProgramFiles\Fortinet\FortiClient\logs\traceand collect the file like 'sslvpndaemon_x.log'. - Check that the policy for SSL VPN traffic is configured correctly. A virtual private network (VPN) is a service that allows a user to establish a secure, encrypted connection between the public internet and a corporate or institutional network. -> See if there are any applications on the client computer which could conflict with FortiClient (For example Cisco's Anyconnect). # ping -t a.a.a.a|cmd /q /v /c "(pause&pause)>nul & for /l %a in () do (set /p "data=" && echoecho(!date! Automatic backup of Ubiquiti ES-48-LITE over SSH, How to reset lost root password on SUSE Linux Enterprise Server, How to reset root password on Debian 8 (Jessie), blob data length is greater than 10% of the total redo log size, PackageKit can't find file in /var/cache/PackageKit/, How to check for, and clean Ebury SSH Rootkit. 02-21-2012 br Bernhard. -> Look into the crashlogs on the FortiGate. Sniffer2 on FortiGate in a SSH session: # diag sniffer packet 'host ' 6 0 l. 6). No message, no popup. 01:32 AM Technical Tip: Explanation of ssl-exit-error and s Technical Tip: Explanation of ssl-exit-error and ssl-new-con events in VPN events log. whether all users or some users are having the SSL-VPN disconnection issue. Created on To troubleshoot SSL VPN hanging or disconnecting at 98%: A new SSL VPN driver was added to FortiClient 5.6.0 and later to resolve SSL VPN connection issues. To troubleshoot getting no response from the SSL VPN URL: Go to VPN > SSL-VPN Settings . Range: <0> to <259200>. If the SSLVPN connection is established, but the connection stops after some time, you should double-check the following two timeout values on the FortiGate configuration: # config vpn ssl settings. # set idle-timeout 300. Default value is 28800 seconds (8 hours). Change the listening Port for the SSL-VPN portal Using another port is an easy but effective measurement if an attacker is only probing the default port of an application. FortiOS version 4.0 (Collect the file before and after the disconnection.). 8). Moving to FortiGate, just got new hardware, what is Firewall policy to restrict usage of OpenVPN. Sorry I don't have a better update than that! A secure sockets layer VPN (SSL VPN) enables individual users to access an organization's network, client-server applications, and internal network . 3 Related Topics Fortinet Public company Business Business, Economics, and Finance 7 comments Best Add a Comment HappyVlane 2 yr. ago Pretty sure the free client doesn't do host checks since 6.2. Automated. Support already went through that with me and didn't see anything in the logs. Each log entry contains a Level (level) field that indicates the estimated severity of the event that caused the log entry. I see from the stats that one of the posts with the most visits is the one about the FortiClient SSL VPN error the vpn server may be unreachable. The FC version is 6.4.6 and the VPN Gateway has 6.4.7 version. Our server cert is also from a Public CA. We have the same messages - allready with 4.3.3 and SSLVPN drops every 10-30 minutes if there are active clients in the LAN - at night or during weekends SSL-VPN works perfect. Thanks. So, a good action plan is useful in determining whether the issue lies on FortiGate or not. # config vpn ssl setting set idle-timeout 300. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Port 1 generally being the outside internet facing interface. It is common to do a probe connect first (attempt a socket connection with 3 seconds timeout, then close the connection right away if then connection is OK), then start the actually login process. !time! On your FortiGate firewall VPN => SSL-VPN Settings. 10). When the SSL VPN receives data from a client application, the data is encrypted and sent to the FortiGate unit, which then forwards the traffic to the application server. there isnt acorrespondingfirewall policy rule that allows access for the user group to any of the internal networks. Below are the steps that could be performed, before opening up a ticket with technical support as that would speed up the troubleshooting process and help in finding out the root cause of the issue: All debugs/sniffers/traffic tests need to be run concurrently and need to have timestamps. Sometimes in rare cases I have found the problem is caused by error on the FortiGate device, in this case no one is able to connect to the VPN neither using SSL VPN or IPsec but the internal networks can go to all local networks and the external internet connection. But what does this mean in detail, what produces this type of error message? Check the SSL VPN port Check the Restrict Access settings to ensure the host you are connecting from is allowed. Make sure "Enable SSL-VPN" is on. Severity Error Go to folder %appdata%\forticlient\logs\trace, get the file like 'sslvpndaemon_x.log'. A user will attempt five or six connections and get kicked back to initial login. After Forticlient VPN Update to 7.0.7.0345 it was fine with invalid VPN server certificate enabled again. Create an account to follow your favorite communities and start taking part in conversations. Select the Advanced tab. (-5), www script to login ssh with password com Portal Detailed Access Account Archives - bankep.com, How to provide SSH password inside a script or oneliner, Ubuntu Shows No Bootable Device After Installation In UEFI Mode - Ubuntu-Server.com, Ubuntu shows No Bootable Device after installation in UEFI mode, VirtualBox Returns Kernel Driver Not Installed On Ubuntu - Ubuntu-Server.com, VirtualBox returns Kernel driver not installed on Ubuntu, Clear Microsoft Teams company SSO login page on Ubuntu, How to convert from CentOS 8 to CentOS 8 Stream, Bluetooth headphones and YouTube videos stop working after upgrade to Fedora 35, Small WordPress backup script that sends email on failed backups and deletes old backups, Brave browser fails to open because of locked profile, PackageKit cant find file in /var/cache/PackageKit/. Meaning An error occurred in the SSL connection. Enable logging of the putty session by following the below document: https://community.fortinet.com/t5/FortiGate/Technical-Tip-How-to-create-a-log-file-of-a-session-usin - Clear logs.- Logging -> Enable logging for these features: VPN.- Log Level: Debug. Edited on If your FortiOS version is compatible, upgrade to use one of these versions. I'm planning to do that but I wondered if anyone else was noticing this behavior, especially after the start of 2022. The Forums are a place to find answers on a range of Fortinet products from peers and product experts. Thanks. A user will attempt five or six connections and get kicked back to initial login. This can cause the session to become 'dirty'. https://community.fortinet.com/t5/FortiGate/Technical-Tip-SSL-VPN-is-disconnected-with-Deleted-to-ma -> Authentication Timeout and idle timeout settings could also be checked on the FortiGate: By default, a SSL-VPN connection logouts after 8 hours due to auth-timeout. Best practice for compromised Fortigate 60F factory reset, Press J to jump to the feed. SSL for SaaS - Serving different content for different ssm-tool - simplifying SSH access over AWS SSM, Live feed from Fortinet's switch warehouse. Diagnose commands SSL VPN debug command Use the following diagnose commands to identify SSL VPN issues. Technical Tip : SSL-VPN disconnection issues when and collect the file like 'sslvpndaemon_x.log'. Limit the count of failed login attepts until the user is banned Fortinet Community Knowledge Base I think these are failed connection attempts on port 443. From FortiClient machine ping test to internal unit through the tunnel like a server (timestamp). In that case a simple reboot of the device solves the problem. The idle-timeout is closing the SSLVPN if the connection is idle for more than 5 minutes (300 . Created on The problem was with the server cert that was not trusted (we were connecting using the server IP). Its tight integration with the Security Fabric enables policy-based automation to contain threats and control outbreaks. 12:36 AM, Created on We had set the algorithm to medium to no effect. These commands enable debugging of SSL VPN with a debug level of -1. you might be trying to connect to VPN from the wrong side of the interface (from one of your internal networks or from the network of one of the sites you already have a site to site connection. -> Some logs/errors in the SSL-VPN logs could be seen with the Reason 'DH lib' and Action 'ssl-exit-error' after the user's connection disconnects and tries to connect again to the SSL-VPN. 04-08-2022 Technical Tip : SSL-VPN disconnection issues when connected with FortiClient. Once the connection drop occurs, then collect & attach the debug/sniffers, SSLVPN logs & System Event Logs from FortiGate, ask the client to note downtime if the issue occurs. problem (-5) could be solved by enabling older versions of SSL or TLS (Start -> inetcpl.cpl -> Advanced -> at the end). 4 Reply FortiClient FortiClient proactively defends against advanced attacks. 12:53 AM, The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.. Table of Contents. Checking the SSL-VPN Monitor in the Forti shows the user as being connected but only with "Web Connections" instead of "Tunnel Connections" It almost like when authenticating Forticlient cant find the user in a User Group so assigned it to the Web-access portal Running Forticlient 7.0 and firmware 7.0.1 on the Forti If the server is not reachable, the windows API will take a long time to timeout (and there is no way to set the timeout for those calls), for the user, it looks very bad, so we first probe the server is OK, then start the login process. I've worked with support and the suggestion was to reduce the vpn ssl setting algorithm from high to medium on the gate (6.4.8). Cookbook | FortiGate / FortiOS 6.2.9 | Fortinet Documentation Library 6.2.9 Download PDF SSL VPN troubleshooting The following topics provide information about SSL VPN troubleshooting: Debug commands Troubleshooting common scenarios 01:30 PM You need to have the rule from the wan interface to one of the internal interfaces with action SSL-VPN and select the group of users which will have access, check if your user is in correct group. # ping -t z.z.z.z|cmd /q /v /c "(pause&pause)>nul & for /l %a in () do (set /p "data=" && echo(!date! Refer to the below document for more information: https://community.fortinet.com/t5/FortiGate/Technical-Tip-Enabling-the-preserve-session-route/ta-p/1 -> If a SSL-VPN tunnel connection is terminated with the log message 'Deleted to make way for another session', then apply the below commands: # config vpn ssl web portal edit set limit-user-logins disable nextend. SSL VPN. FortiClient proactively defends against advanced attacks. Copyright 2022 Fortinet, Inc. All Rights Reserved. Sometimes in rare cases I have found the problem is caused by error on the FortiGate device, in this case no one is able to connect to the VPN neither using SSL VPN or IPsec but the internal networks can go to all local networks and the external internet connection. Hi, we are experiencing the same issue only on few PCs. My settings: Listen on any interface Listen on Port 10443 Usergroup TEST is mapped to fullaccess Split tunneling is disabled Web Access portal is function properly with 192.168.1.254:10443" but when i want to connect with FortiClient, i get the error In ssl-exit-error event, we also observed the reason of 'DH lib' similar in customers logs. )&ping -n z.z.z.z>nul". Had the same issue with 6.4.5 and 6.4.7. I have installed openvps on centos 6, everything seems to be configured correctly, but I cant ping across the tunnel, any advice? -> The issuemight occur if there are multiple interfaces connected to the Internet, for example, SD-WAN. Make sure you "Listening on (interfaces)" is set as required. On the FortiClient side, UserB sees Unable to establish the VPN connection. The reason for this behavior is that we use Windows API to make those HTTPS calls for the login process. As you can see in one of my earlier posts, the firewall rules on local machine, or on the network gateway ( I have rarely found this to be the problem with this error). Fortinet Community Knowledge Base FortiClient 13). In that case a simple reboot of the device solves the problem. cheers, Hi! Press question mark to learn the rest of the keyboard shortcuts. https://community.fortinet.com/t5/FortiGate/Technical-Tip-SSL-VPN-connection-logout-after-8-hours/ta -> If the issue is limited to a particular user or a few users, then ask the user or users to use another network (for example mobile hotspot) and see if the issue is reproduced. 02-21-2012 Edited on # set auth-timout 28000. Use a wired connection if possible in the user's network. the user is not in the correct user group that has VPN access (either the local firewall group or the LDAP server group if youre using one). As the error states itself the most common problem is that either the username or the password isnt matching the one of the device. To allow multiple interfaces to connect, use the following CLI commands. I had been seeing what I thought was the issue at home but that turned out to be my own Internet. Port number of the traffic's destination. The ID (logid) is a 10-digit field. The VPN server may be unreachable. You should also be on 629 minimum but better yet 646 or later. # diag sniffer packet any 'host and icmp' 4 0 l, 12). This is an expected behavior of FortiClient Window. So try to removetraffic logging on some of the rules or events. This is most commonly caused by, either the firewall blocking any kind of traffic towards the VPN server IP address or the FortiClient application itself by the firewall on the host or on the network, or either by routing errors towards the IP address of the VPN server. Broad. Finally a connection is made, but the sslvpn logs show ssl-exit-error and the reason is DH lib. 05-20-2022 Configuring the VPN overlay between the HQ FortiGate and AWS native VPN gateway Configuring the VIP to access the remote servers Configuring the SD-WAN to steer traffic between the overlays Created on 2). i.e. - Check the restrict access setting to ensure the host connected from is allowed. 04-08-2022 With a trusted cert, the problem went away. I have very strange issue. # config system interface edit set preserve-session-route enable nextend. HTTPS/SSH administrative access: how to lock by Country? Its tight integration with the Security Fabric enables policy-based automation to contain threats and control outbreaks. How to solve ssl vpn failure. Hi, The error does not necessarily indicate a problem with FortiGate if only 1 user or certain users are having issues. FortiClient is compatible with Fabric-Ready partners to further strengthen enterprises security posture. -> Perform basic configuration checks on the FortiGate pertaining to SSL-VPN. The auth-timeout is the period of time in seconds that the SSL-VPN will wait before re-authentication is enforced. Debugs on FortiGate in a SSH session: # diag deb reset# diag deb console time en# diag deb app sslvpn -1# diag vpn ssl debug-filter src-addr4 x.x.x.x <----- Public IP of .# diag deb duration 0# diag deb en# diag sniffer packet any 'host 1.2.3.4 and icmp' 4 0 l <----- Leave it as it is. )&ping -n 2 x.x.x.x>nul". Still see the errors in my logs but it doesn't appear to be affecting users. RDP (Remote Desktop Protocol), similar to VNC, enables you to remotely control a computer running Microsoft Terminal Services. FortiClient FortiClient4 4 3 1 10%GW Unable to establish the VPN connection. Add FortiGate SSL VPN from the gallery To configure the integration of FortiGate SSL VPN into Azure AD, you need to add FortiGate SSL VPN from the gallery to your list of managed SaaS apps: Sign in to the Azure portal with a work or school account or with a personal Microsoft account. In tunnel mode, the SSL VPN client encrypts all traffic from the remote client computer and sends it to the FortiGate through an SSL VPN tunnel over the HTTPS link between the user and the FortiGate. In ssl-new-con event, we also observed the reason of 'N/A' similar in customers logs. Hi! Latency or poor network connectivity can cause the login timeout on the FortiGate. Press the Win + R keys enter inetcpl.cpl and click OK. Unique selling points of Fortinet/Fortigate ? From FortiClient machine ping test to external IP like the Fortigate's Default Gateway (timestamp). -> Check the configuration on FortiGate for any traffic shapers applied on the WAN interface, DoS policies, and local-in policies created. The Internet Options of the Control Panel can be opened via Internet Explorer (IE), or by calling inetcpl.cpl directly. FortiGate SSL VPN supports SP-initiated SSO. and SSLVPN drops every 10-30 minutes if there are active clients in the LAN - at night or during weekends SSL-VPN works perfect. - Go to Policy -> IPv4 Policy or Policy -> IPv6 policy. Click to share on Facebook (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Reddit (Opens in new window), Click to share on Tumblr (Opens in new window), Click to share on Pocket (Opens in new window), Click to share on Skype (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on WhatsApp (Opens in new window), Click to email a link to a friend (Opens in new window), Windows 2008 server hangs at Applying user settings, services not working, Add sidebar in WordPress Twenty Eleven single post pages, the vpn server may be unreachable. - Fortinet Community FortiGate FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic. 3). 9). 03-29-2022 01:17 PM. This problem started after upgrading the Fortigate from a very old 5.2.3 to the latest 5.4 firmware - 5.4.7. -> For higher-end units, there could be IPv4 access control lists, which could be checked and disabled for testing. 4). (-14) In the logs I see: Tunnel-Up -> shows UserB group GrpB Tunnel-Down -> same, but shows tunnel connection setup timeout SSL-Exit-Error -> shows UserB group L1A, error: DH lib Any user setup as a member of GrpA + L1A = VPN works According to Fortinet support, the settings are taken from the Internet options. # ping -t x.x.x.x|cmd /q /v /c "(pause&pause)>nul & for /l %a in () do (set /p "data=" && echo(!date! It . I wanted to set up a SSL VPN. r/Fortinet has 35000 members and counting! Everything went great with the upgrade,but the client would bomb out at 40 percent with "VPN server maybe . This is a repost ofa post from an old blog, made on July 13, 2012, that used to be on: http://adminramble.com/common-forticlient-ssl-vpn-errors/. 11). 7). Integrated. Sniffer1 on FortiGate in a SSH session: # diag sniffer packet 'host ' 4 0 l. 5). Since the start of 2022 I've been seeing frequent FortiClient sslvpn connection problems for users, me included. So basically it's become a non-problem with no users reporting issues. The tunnel disconnection could be caused due to ISP issues, client-side issues or packets not reaching FortiGate's SSL-VPN process. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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