34 lines
1,008 B
Markdown
34 lines
1,008 B
Markdown
# SSH port forwarding
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Local port forwarding allows ssh to connect one of your ports to the
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destination's port. This is particularly useful for localhosted websites, which
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you can run on the host and access on your machine
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Some key terms:
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```
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<client-port> = Port on the machine you're using to ssh. Ex: laptop
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<host-port> = Port on the machine running sshd
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<host-address> = URL of machine running the sshd, which you're logging onto
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<url-from-host> = Name relative to the host machine who's port the host forwards
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```
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The opens an ssh tunnel without obstructing the current terminal:
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```bash
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ssh -NL 8001:localhost:7000 emiliko@cs.ox.ac.uk &
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ssh -NL <client-port>:<url-from-host>:<host-port> <user>@<host-address> &
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```
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# In config file
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The syntax in the `~/.ssh/config` is quite similar
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```ssh
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Host mirrorside
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User emiliko
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Hostname cs.ox.ac.uk
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LocalForward 8001 localhost:7000
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```
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The general format looks like
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```ssh
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LocalForward <client-port> <host-address>:<host-port>
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```
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