SSH Config Generator

About this tool

Builds a Host block for your OpenSSH client config file (~/.ssh/config). Enter a host alias, the HostName (IP or domain), the User, a Port and an optional IdentityFile, and the tool writes the matching lines. The port is only written when it is not 22. It always adds ServerAliveInterval 60, which sends a keep-alive message every minute to help stop idle connections from dropping. After saving the block you can connect with just ssh and the alias. The tool does not connect to anything or check your values, and it does not make a key; it only produces text in your browser. Review it before pasting it into your config.

How to use it

1. Enter an alias, the hostname or IP, and the user name.
2. Change the port if the server does not use 22, and add the path to your private key if you use one.
3. Copy the output and add it to ~/.ssh/config.
4. Connect with ssh followed by your alias.

Example

Alias: myserver
HostName: 192.0.2.1
User: root
Port: 2222
IdentityFile: ~/.ssh/id_ed25519

Host myserver
    HostName 192.0.2.1
    User root
    Port 2222
    IdentityFile ~/.ssh/id_ed25519
    ServerAliveInterval 60

Common problems

Permission denied after adding the config

Check that IdentityFile points to the right private key and that the key file permissions are strict (for example chmod 600).

Alias not recognized

The Host line must match what you type after ssh exactly, and the block must be saved in ~/.ssh/config.

Keep-alive is not wanted

ServerAliveInterval 60 is always included; delete that line from the output if you do not want it.