You don't really need to create TCP tunnels to chain ssh connections.

You can do it as... 

ssh -t shmem@gateway ssh -t admin@host.example.com \
  ssh -t wrxd15@192.168.123.2 ssh -t root@192.168.254.2

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You can also use ProxyCommand entries inside your ~/.ssh/config file to connect to remote servers in custom ways.

For instance, to connect to foo.net.org via other.server.org via my.server.org... 

# .ssh/config
Host foo
ProxyCommand ssh me@my.server.org         \
  ssh me@other.server.org                 \
  ssh root@foo.server.org /usr/sbin/sshd -i

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And then... 
ssh foo

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In reply to Re: ssh chain by salva
in thread ssh chain by shmem

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