Hi Community,
we are facing a strange behaviour with sstp-tunnels here with V6.7 and V6.10
Local device is OgmaConnect, remote devices are RB750G.
Initial staus: No sstp session is established.
We now set up sstp-sessions from the remote devices A and B. Both tunnels are stable. So far - so good.
After we interrupt one of the tunnels it recovers but starts toggling due to keepalive/inactivity timeouts. The other sstp-session meanwhile remains stable. Fault analysis showed that the echo-request from the local site (Ogma) does not arrive at the remote site and causes timeout then. The log at the local site says that the echo-reuest was sent but it seems to be "swallowed" by the local Ogma. Same applies vice versa to the echo-request being sent from the remote site. The logfile at the local site says that it was answered but the answer does not arrive at the remote site. A packet capture is indicating that no TLS packet was sent out from the local site.
We also checked the firewall settings but could not find any indication - at the initial setup both tunnels are working stable exchanging their echo-request/response.
Problem can be reproduced with two or more sstp-sessions and starts after the first tunnel is interrupted and re-established.
Has anybody experienced this also ? Any help is welcome - also how to further analyse the issue locally.