To configure an SSH tunnel for POP3 traffic, follow these steps:
1. Open a terminal window.
2. Use the SSH command to create the tunnel. The syntax for the command is as follows:
```
ssh -L [local port]:localhost:[remote port] [remote server]
```
Where:
- [local port]: the local port number you want to use for the tunnel (e.g. 110).
- [remote port]: the remote port number for POP3 traffic (usually 110).
- [remote server]: the name or IP address of the remote server you want to connect to.
For example, if you want to create a tunnel from your local machine to a remote server with the address 192.168.1.100, and use port 110 for the local machine and the remote server, the command would be:
```
ssh -L 110:localhost:110 192.168.1.100
```
1. Once the tunnel is established, configure your email client to use the local port you specified (e.g. 110) for the POP3 server address. The email client will connect to the local port, and the traffic will be forwarded through the SSH tunnel to the remote server.
Note that you may need to ensure that your firewall allows traffic on the local port you specified, and that your email client is configured to use SSL/TLS encryption if desired.
