Important note about SSL VPN compatibility for 20.0 MR1 with EoL SFOS versions and UTM9 OS. Learn more in the release notes.

  • DNS request to DNS over Site2Site VPN

    Hello! We are using a Hardware Firewall XGS-2100 to connect to two datacenters running our AD Controller there. The AD is also our DNS Server. This worked fine for a long time. For some reason one of the VPN stopped working and one of the AD Controller…
  • VPN IPsec site-to-site connexion established but no trafic

    I have a VPN IPsec tunnel between my two firewall sophos. I have a connection but no trafic. I made some firewall rules but I have nothing. This is my schema. And there are my rules: Could someone help me ? Thanks
  • Firewall VPN site-to-site Sophos GX and Sonicwall - dropping connection

    I have a Sophos model SFV1C4 with SFOS 19.5.2 MR-2-Build624 After the last firmware my site-to-site connections is timing out. It is Sonicwall that initiate the connections. I am using IKEv2 and after a while I get an error: ID 983 VPN IKEv2 Received…
  • Dead Peer Detection - Design Flaw and workaround

    Dead Peer Detection has a hidden design flaw. Dead Peer Detection is a feature designed to retry\re-establish a tunnel when a tunnel drops. You can set 3 settings in this feature for 1)how long to wait before a retry, 2)how long to wait for a response…
  • STAS over IPSEC with authentication at Head office

    Good day Folks, I'm trying to get the following scenario to work for "STAS over IPSEC with authentication at Head office instead of branch": 1. User signs in at branch office 2. HEAD office firewall picks up or gets the authentication forwarded…
  • Sophos XG fail with issue "IPsec connection could not be established" with Tunnel interface AWS.

    Dear Support; I am using sophos xg firewall hardware device. I do IPSec configuration with AWS according to their configuration file. And follow Sophos Firewall: AWS VPN Gateway IPSEC Connection I received the notice "IPsec connection could not be…
  • V19.5.3 and HA-Cluster - VPN Fails "invalid SPI" after upgrading

    Hi, i upgraded our XGS2100 from 19.5.2 to 19.5.3 We had a solid VPN Connection to a customer, after upgrading the Connection fails from time to time and VPN Log shows. 2023-08-28 10:11:14 IPSec Deny Received IKE message with invalid SPI (19CBD566…
  • Site-to-site VPN - Why can't you view your settings when you have a failover group

    Why can't you view your site-to-site settings when you have a failover group active. Whenever I'm working with a SOPHOS engineer on an issue, the first thing they want to do is view the VPN settings, but they can't without taking the VPN tunnel offline…
  • IPSEC VPN traffic not passing passing through to DST IP

    Hey All, , So i had something interesting that got fixed today. On the old XG V17-19 when you create a IPSEC VPN, you didnt need to add a no NAT rule (I could be mistaken if some one can confirm this) But on the XGS, I had setup all the VPNs…
  • Ipsec site to site connection

    im having the problem with ipsec to a client with cisco firewall. The firewall cannot connect to the remote site but the policies and the satting are the same. This is how my setup is Local Public ip : 154.120.225.2 Local ID : set as the Public ip…
  • Need Help with Client IPSec VPN (Connect) in to Site2Site VPN IPSec Tunnel (Policy Based)

    Dear Community, my name is david lorenz and I have a problem at one of our customers. At first I will describe my network situation. They have a HQ and a BO. The HQ has the network: 192.168.2.0/24 (Sophos XG210 with 192.168.2.1) The BO has the…
  • Firewall Drop several initial packet from vpn site to site

    I have configured an IPSec VPN site-to-site connection between two sites, and after that, the ping traffic was going through between the sites. However, about 10 minutes later, when I pinged again to check, there were always a few initial packets that…
  • the received traffic selectors did not match: ::/0 === ::/0

    I currently have multiple tunnels on a SFV4C6MSP running on a cloud VM. I use this router to connect multiple IPsec tunnels to different customers. These tunnels are setup as tunnel interfaces. and they will work fine for weeks, or months before one…
  • Route based IPSec traffic stops passing xfrm disabled after pppoe reconnect

    Hello, Every 24 hours after the pppoe connection is reconnected, traffic stops passing through the tunnel. My side is configured as a branch, has a dynamic ip address and initiates an ipsec connection. After the wan ip address is changed, the tunnel…
  • IPSec strongswan creating CHILD_SA failed in logs

    Hello, I have IPSec site to site tunnel and I need to troubleshoot why at some point tunnel goes down and or traffic stops flowing. What means this part of log. At the moment tunnel is up and traffic is flowing. Other side has Fortinet firewall, my…
  • Site to Site VPN Issues Between Sophos XGS 116

    We are setting up a Site to Site IPSEc VPN between two Sophos XGS 116s. - Is it better to use a pre-shared key or an RSA key? - In the firewall rules, should we put some IPS policy? - In the VPN profile, do we use the IKEv2 protocol? Thanks André…
  • site to site VPN

    Dear Sophos Team, can we setup site to site VPN in same subnet?
  • How do I connect a NAS that has Wireguard support to Sophos firewall?

    I am using Unraid NAS on a remote site without public IP. It has support for Wireguard server. I assume there is also a wireguard client. Can this remote NAS connect to my Sophos XG appliance so I can remotely access the remote Unraid NAS? Is this called…
  • Sophos to Smooth wall Site to Site VPN connection

    Anyone in the community has configured Sophos to Smoothwall site-to-site vpn? we have issues establishing the VPN connection between two sites The Details for Phase 1 and Phase 2 are all matching we created firewall rules on both ends the status…
  • VTI SNAT

    Hello, I need help with tunnel configuration. For now I have working ipsec connection to remote 3rd party firewall and sd-wan route to route traffic coming from my network (172.19.19.0/24) to destination ip addresses through tunnel interface. The…
  • Site to Site VPN best practice for multi-wan to multi wan

    Hi All, I inherited a SITE to SITE configuration that I believe is misconfigured. I am in hopes that I can get help to understand the best way to do this. It doesn’t seem right. Maybe I’m just missing a Failover group on the first site.? 1st XG125…
  • XFRM GATEWAY health check STATUS IS DOWN on both head office and branch office

    I have created ipsec tunnel to enable branch office to access head office, tunnel on both offices are 'up' but xfrm gateways on both sides which i have used in sdwan routing are 'down'. but by using diagnostic tool i can ping both xfrm interfaces but…
  • IPSEC Setup with Zscaler

    hi all, we encountered some limitation with sophos fw, under SFOS 19.5 with IPSEC configuration. There is no possibility to set null encryption under ipsec phase 2 part. Is there a way to bypass this limitation ?
  • ipsec site-to-site vpn problem with dnat servers

    Hi, we have an XG135 in the headoffice and an XG87 in the branch office. in the headoffice we have two servers ( mail and something else ) that need to be reachable from the outside and we used the Server Accesss Assistant to create the correpsonding…
  • Sophos SG --> XGS IPSec Connection Terminated

    hi, we have the problem that an IPSec connection between SG and XGS shows Terminated status several times a day and then the status changes directly back to established and the connection continues to work without problems. What settings or logs should…