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Update ssh port forwarding notes

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Akemi Izuko 2022-10-12 17:15:13 -06:00
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notes/shell/ssh_port_forwarding.md
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# SSH port forwarding # SSH port forwarding
Local port forwarding allows ssh to connect one of your ports to the
destination's port. This is particularly useful for localhosted websites, which
you can run on the host and access on your machine
Some key terms:
```
<client-port> = Port on the machine you're using to ssh. Ex: laptop
<host-port> = Port on the machine running sshd
<host-address> = URL of machine running the sshd, which you're logging onto
<url-from-host> = Name relative to the host machine who's port the host forwards
```
The opens an ssh tunnel without obstructing the current terminal:
```bash
ssh -p10011 -NL 7000:localhost:8080 emiliko@localhost & ssh -p10011 -NL 7000:localhost:8080 emiliko@localhost &
Opens an ssh tunnel without obstructing the current terminal. Syntax for the ssh -NL <client-port>:<url-from-host>:<host-port> <user>@<host-address> &
tunnel looks like: ```
<client_port>:<url_from_host:host_port>
# In config file
The syntax in the config is quite similar
```ssh
LocalForward 8001 localhost:7000
LocalForward <client-port> <host-address>:<host-port>
```