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I want to connect with my university and use a cluster. I connect via vpn with university.Now i want to connect with the cluster with ssh protocol. I have the ip,so in a terminal i write "ssh ip" (of the cluster) ssh: connect to host port 22: Connection timed out

what may be wrong ?

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Can you ping that ip? – LnxSlck Mar 14 '12 at 11:46
i write ping 195.xx.xx.x. PING ( 56(84) bytes of data. after that nothing happens – Danath Mar 19 '12 at 14:28
Your problem isn't with the port 22 or ssh, your problem is that you have no connection to that IP, maybe firewall problem or other thing. – LnxSlck Mar 19 '12 at 21:48

This sounds more like a general networking issue than anything wrong with SSH itself. I'd try:

  • Pinging known hosts on the network
  • Using a tool like to make sure you're really on the VPN
  • If they both work, trying to access other protocols on other servers in the remote network (most Universities have an intranet, for example).
  • Use IPs when possible. If you're using mDNS or a local DNS server (inside the remote network) this can mess around with things especially if your computer has cached an external DNS record (which doesn't line up with the VPN-internal version). I'm not explaining that particularly well, but try an IP if you're currently using a domain name.

If you know you're on the VPN properly and can access other network services, that's when it's time to ping your IT department an email. There could be a policy to segregate VPN connections from the cluster for security reasons and they're likely the people who will know about it.

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yesterday it works!without do anything.Today the same problem! why? – Danath Mar 19 '12 at 14:21

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