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Setup ssh tunnel in putty8/7/2023 ![]() Host hop1įrom your computer, you can test each jump individually, i.e. The ProxyJump keyword is used to specify an intermediate host is needed to arrive at the target host. I can use ~/.ssh/config config file which contains the details of each host and all identities needed to access each host on my host PC. If I want to use a single ssh command to go from your PC to any of the hosts. To get to the final computer I may have used multiple ssh commands and the identity files are stored on multiple computers: $ ssh -p 22 -i ~/.ssh/pem/identity1.pem To illustrate this, suppose I needed to get to a destination in 3 hops, and, for each hop, I needed to specify username, host, port, and identity. My answer is really the same as all the other answers here, but, I wanted to clarify the usefulness of ~/.ssh/config and ProxyJump. To access port 8080 on HOSTC via HOSTA and HOSTB: mssh HOSTA HOSTB -L8080:HOSTC:8080 To access HOSTC via HOSTA and HOSTB and use non-default SSH-portnumbers and different users: mssh access HOSTC via HOSTA and HOSTB and use X-forwarding: mssh HOSTA HOSTB HOSTC -X To access HOSTC via HOSTA and HOSTB (same user): mssh HOSTA HOSTB HOSTC $cmd = "ssh $localhost -p $iport -o UserKnownHostsFile=/dev/null -o StrictHostKe圜hecking=no" As a result, the first ssh command keeps the tunnel open until the following two conditions are satisfied: sleep 10 is finished and the tunnel is no longer used.Īfter reading the above and glueing everything together, I've created the following Perl script (save it as mssh in /usr/bin and make it executable): #!/usr/bin/perl Usually, the first ssh command would close after 10 seconds, but during this time, the second ssh command will have established a connection using the tunnel.
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