I set up an OpenVPN server in bridged mode – using tap0 – and client
both running CentOS 4.4. The VPN works perfectly, except for printing
from the client LAN – 10.1.2.x/24 to the server LAN – 10.1.1.x/24. I am
using a HP 1320n network printer with IP 10.1.1.100 on the server side.
I can telnet to the printer’s port 80 from anywhere in the client LAN
without a problem. However, trying to telnet to port 9100 results in a
connection refused error. If I telnet the printer’s port 9100 from the
client side VPN server, it connects without a problem. My vpn iptables
rules on both sides look like this:
iptables -A INPUT -p udp –dport 1194 -j ACCEPT
iptables -A INPUT -i tun+ -j ACCEPT
iptables -A OUTPUT -o tun+ -j ACCEPT
iptables -A FORWARD -i tun+ -j ACCEPT
iptables -A FORWARD -o tun+ -j ACCEPT
iptables -A INPUT -i tap+ -j ACCEPT
iptables -A OUTPUT -o tap+ -j ACCEPT
iptables -A FORWARD -i tap+ -j ACCEPT
iptables -A FORWARD -o tap+ -j ACCEPT
iptables -A FORWARD -p 50 -j ACCEPT
iptables -A FORWARD -p 51 -j ACCEPT
iptables -t nat -A POSTROUTING -o tun0 -j MASQUERADE
iptables -t nat -A POSTROUTING -o tap0 -j MASQUERADE
Any ideas on how to fix this?