I've got a debian server at home, that I use to have a VPN access to my home computers.
I've redirected the openvpn port on the port 2000 : in my file "server.conf", I've added this :
#Server mode server proto udp port 2000
With the connexion tracking, I allow all the related and response connexions.
I've set up a rule, allowing everybody on the port 2000 :
iptables -t filter -A INPUT -p tcp --dport 2000 -j ACCEPT
however, it doesn't allow me to connect to my VPN (if I disable the firewall, I can connect without any problem).
So, what haven't I understood? does openvpn need another port?