View source for sshtips
examples:
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$ vim .ssh/config
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Host ebal3
Hostname 158.255.214.14
Port 2222
Host 192.168.0.153
ProxyCommand ssh vpn.example.com -p 2222 nc %h %p
Host myhomepc
ProxyCommand ssh 1.2.3.4 nc %h %p
Hostname 5.6.7.8
User ebal
Port 12345
Compression yes
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ssh -L 8080:localhost:8080 proxy.example.com
ssh -NCD 8080 gateway_machine
ssh -L 8080:proxy.example.com:8080 -L 1993:imap.gmail.com:993 -L 1465:smtp.gmail.com:1465 work_machine
@work: ssh -R 9999:localhost:22 home_machine
@home: ssh localhost -p 9999
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