50 lines
1013 B
Markdown
50 lines
1013 B
Markdown
# SSH - Tailscale setup
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## Tailscale
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Install Tailscale:
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```bash
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curl -fsSL https://tailscale.com/install.sh | sh
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```
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Get Tailscale up:
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```bash
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sudo tailscale up
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```
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Run Tailscale at boot:
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```bash
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sudo systemctl enable --now tailscaled
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```
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To retrieve the IPv4 address (100.x.y.z) on the Tailscale network:
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```bash
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ip addr show tailscale0
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```
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## SSH
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From the client, to copy the public key to your server using its Tailscale IP (or the server's name if MagicDNS is enabled in the Tailnet):
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```bash
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ssh-copy-id [email protected]
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```
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To deny root login, password auth, keyboard interactive auth and allow public key auth:
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```bash
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sudo nano /etc/ssh/sshd_config.d/50-hardening.conf
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```
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and add:
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```
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PermitRootLogin no
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PasswordAuthentication no
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KbdInteractiveAuthentication no
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PubkeyAuthentication yes
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```
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then restart ssh:
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```bash
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sudo systemctl restart ssh
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```
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## UFW
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To allow ssh (port 22) connections on tailscale0 interface only in UFW:
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```bash
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sudo ufw allow in on tailscale0 to any port 22 proto tcp
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``` |