SSH to linux system is failing
We have a vendor who has put his linux based appliance behind a firewall. If I ssh to the system from the same subnet as the linux appliance ssh succeed - giving me a login prompt and then succeeding with authentication. If I login to the linux appliance from the Outside of the firewall the conversation succeeds apparently - I get a login prompt. But when I enter the same credentials the connection is promptly terminated. If I look at the firewall I see only the allowed SSH session and no other denies to the server.
Any idea what might be going on? What logging could be looked at on the linux appliance to give us insight as to why the ssh connection is failing in the second case? Thank you
Any idea what might be going on? What logging could be looked at on the linux appliance to give us insight as to why the ssh connection is failing in the second case? Thank you
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Thank you both very much. It turned out the appliance was running a version of ssh that the client machine was not matching
Consult with the vendor whether external connection to the appliance are authorized?
Check the routing table (netstat -rn) when logged into the appliance locally.
Does your location has DUAL wans two paths to the outside?
create a new standard/limited user, and see if it can login from the outside.