To completely uninstall StrongSwan and xl2tpd from your Debian 12 system, follow these steps:
1. Stop the Services
First, stop the services of StrongSwan and xl2tpd:
sudo systemctl stop strongswan sudo systemctl stop xl2tpd
2. Disable Auto-Start
To disable these services from starting automatically at boot, run:
sudo systemctl disable strongswan sudo systemctl disable xl2tpd
3. Uninstall the Packages
Use apt to uninstall StrongSwan and xl2tpd along with their configuration files:
sudo apt remove --purge strongswan xl2tpd
This will remove both the packages and their configuration files from your system.
4. Delete Configuration Files and Directories
Although the apt remove command will delete most configuration files, some may remain on the system. To ensure they are completely removed, manually delete the configuration directories:
sudo rm -rf /etc/strongswan sudo rm -rf /etc/xl2tpd
5. Remove Any Unused Dependencies
After uninstalling, it’s a good practice to remove any residual dependencies or packages that are no longer required:
sudo apt autoremove --purge
6. Remove Firewall and Routing Rules (if applicable)
If you made changes to your firewall or routing configuration (e.g., for IP forwarding or specific ports), it’s a good idea to clean these up.
For instance, if you added port 500 (for IPsec), remove that rule:
sudo ufw delete allow 500/udp sudo ufw delete allow 4500/udp
7. Reboot the System (Optional)
To ensure that all configurations and services are fully cleared, it’s recommended to reboot your system:
sudo reboot
By following these steps, you will completely uninstall StrongSwan and xl2tpd from your Debian 12 system. This ensures that both the services and any associated configuration files are removed.