# Key-Only Login

**SSH-Config**
```bash
nano /etc/ssh/sshd_config
```

**Wichtige Einstellungen**
```
PasswordAuthentication no
ChallengeResponseAuthentication no
UsePAM no
PermitRootLogin prohibit-password
PermitEmptyPasswords no
Protocol 2
LoginGraceTime 60
MaxAuthTries 3
X11Forwarding no
```

**SSH neustarten:**
```bash
systemctl restart sshd
```