Is there an external firewall for my VPS?
By default there is no firewall for your connection. Your VPS provides excellent firewalling via the built-in iptables firewall/filter. You have full control over iptables to firewall traffic as you see fit.
We do reserve the right to firewall ports externally if any problems would occur – attacks, spam problem, etc.
As an example, if your server were to be compromised and attacked others we may firewall all ports except ssh until you are able to connect and fix the problem, etc.