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VPN, telephony and other services no longer working


Following a reboot of our servers, we are no longer able to access several internal and external services (VPN, telephony, User portal)

I am neither a network expert nor an advanced user of Sophos solutions, but I will gladly provide you with more information if needed.

We have been using Sophos UTM 9 for several years without any problems. However, all of a sudden, here is what I see and can already pass on as information:

  • The User Portal site is no longer accessible externally, but is accessible from the internal network
  • The VPN connection does not work externally anymore, but works from the internal network
  • We can receive calls, but we can't hear the caller and he can't hear us.
  • We have access to the Internet from the internal network, but we can no longer connect or configure certain applications (impossible to connect to the telephony application / impossible to configure certain services, for example, the configuration of an email service on certain workstations, whereas when connected to another network it works).
  • No modification of the firewall has been done in the last months. We are updating it, but the configuration has remained the same.

I have tried to restart Sophos UTM several times with no results. The first few minutes everything works normally, then the telephony does not work anymore and the User Portal is inaccessible again. In the past, we have used the infrastructure several times without any problems.

All these problems are very sudden. I am aware that it is difficult for you to help me with this information, but I will gladly provide you with additional information if needed.

I think the reasons could be many things but I can't find any particular error in the UTM logs to help me correct the situation. If you have an idea of a problem that could make us suddenly face these issues I would be very grateful.

At your disposal,
Thanks in advance

FYI > VPN Client log :

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