**PLEASE NOTE**: Algo is intended for use as a _dedicated_ VPN server. If you install Algo on an existing server, then any existing services might break. In particular, the firewall rules will be overwritten. If you don't want to overwrite the rules you must deploy via `ansible-playbook` and skip the `iptables` tag as described in [deploy-from-ansible.md](deploy-from-ansible.md), after which you'll need to implement the necessary rules yourself.