Linode PPTP VPN iptables configuration

iptables

# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*nat
:PREROUTING ACCEPT [10:532]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]

# PPTP
-A POSTROUTING -s 10.18.1.0/24 -o eth0 -j MASQUERADE 

COMMIT

*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT

# SSH
-A INPUT -m state --state NEW -m tcp -p tcp --dport 8086 -j ACCEPT

# HTTP
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT

# PPTP
-A FORWARD -i ppp+ -o eth0 -j ACCEPT
-A FORWARD -i eth0 -o ppp+ -j ACCEPT
-A INPUT -i eth0 -p tcp --dport 1723 -j ACCEPT
-A INPUT -i eth0 -p gre -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT