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SSH Socket

systemctl edit

sudo systemctl edit ssh.socket

# ubuntu 24.04
[Socket]
ListenStream=
ListenStream=2222

# ubuntu 24.10
[Socket]
ListenStream=
ListenStream=0.0.0.0:2222
ListenStream=[::]:2222

sudo systemctl restart ssh.socket

You might need to update the ListenStream config in /etc/systemd/system/sockets.target.wants/ssh.socket.

Change it from:

[Socket]
ListenStream=22
Accept=no

To:

[Socket]
ListenStream=2222
Accept=no

I recommend a diff and higher port though.

After the changes, you will need to reload the systemctl daemon and restart ssh.

sudo systemctl daemon-reload
sudo systemctl restart ssh

sudo systemctl disable --now ssh.socket
sudo systemctl enable --now ssh.service
sudo systemctl restart ssh sshd

# SSH Socket

## systemctl edit

```bash
sudo systemctl edit ssh.socket
```

```ini
# ubuntu 24.04
[Socket]
ListenStream=
ListenStream=2222

# ubuntu 24.10
[Socket]
ListenStream=
ListenStream=0.0.0.0:2222
ListenStream=[::]:2222
```

```bash
sudo systemctl restart ssh.socket
```

## Another way to change port

[source](https://askubuntu.com/questions/1483893/unable-to-change-ssh-port-on-ubuntu)

You might need to update the ListenStream config in /etc/systemd/system/sockets.target.wants/ssh.socket.

Change it from:

```bash
[Socket]
ListenStream=22
Accept=no
```

To:

```bash
[Socket]
ListenStream=2222
Accept=no
```

I recommend a diff and higher port though.

After the changes, you will need to reload the systemctl daemon and restart ssh.

```bash
sudo systemctl daemon-reload
sudo systemctl restart ssh
```

## Another approach: disable socket

[source](https://discourse.ubuntu.com/t/sshd-now-uses-socket-based-activation-ubuntu-22-10-and-later/30189/18)

```bash
sudo systemctl disable --now ssh.socket
sudo systemctl enable --now ssh.service
sudo systemctl restart ssh sshd
```