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Update security doc -- Add fail2ban SSH config step if we modify SSH default port
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security.md
25
security.md
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@ -77,6 +77,31 @@ yunohost firewall reload
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yunohost firewall disallow <your_old_ssh_port_number> # port by default 22
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```
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You also need to give fail2ban the new SSH port.
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To do that you need to create the configuration file `my_ssh_port.conf` with the command
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```bash
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nano /etc/fail2ban/jail.d/my_ssh_port.conf
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```
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and you can fill it with
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```
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[sshd]
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port = <votre_numero_de_port_ssh>
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[sshd-ddos]
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port = <votre_numero_de_port_ssh>
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```
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Finally you have to restart fail2ban in order to apply the new configuration
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```bash
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systemctl restart fail2ban.service
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```
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**For the next SSH connections ** you need to add the `-p` option followed by the SSH port number.
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**Sample**:
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@ -91,6 +91,30 @@ yunohost firewall reload
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yunohost firewall disallow TCP <votre numéro de port> # port par défaut 22
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```
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Il convient également de donner à fail2ban le nouveau port SSH à bloquer en cas de bannissement d'une adresse IP.
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Pour cela il suffit de créer le fichier de configuration `my_ssh_port.conf` avec
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```bash
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nano /etc/fail2ban/jail.d/my_ssh_port.conf
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```
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et de le compléter ainsi :
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```
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[sshd]
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port = <votre_numero_de_port_ssh>
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[sshd-ddos]
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port = <votre_numero_de_port_ssh>
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```
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Il reste enfin à relancer fail2ban pour prendre en compte la nouvelle configuration
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```bash
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systemctl restart fail2ban.service
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```
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**Pour les prochaines connexions SSH** il faudra ajouter l’option -p suivie du numéro de port SSH.
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**Exemple** :
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