We are working on Client's remote server and accessing the same from putty from our office.
Now from last 1 month we are facing an issue of inaccessibility of servers from same gateway we configured on our Desktop.
However some machines are accessing the same remote server from same gateway some are not and having error "Server unexpectedly closed network connection"
Then user switched to another gateway which we have as backup. But after some days again remote server stop accessible from this new gateway.
We have Gateways on Linux servers.
I am not able to figure out this issue and need help on the same.
Check the remote server's /var/log/messages for the connection refusal reason by accessing it from some other machine where you have access. Do a traceroute also..