NETFILTER --> NAT --> HOWTO I very badly speak English! We use VPN-connections (PPTP) through firewall. It uses two connections: 1723/tcp and 47/ip(GRE). When I give a range of IP addresses to SNAT, two PPTP connections (1723/tcp & GRE) leave from Firewall (SNAT) with different IP-addresses. And VPN-connection does not work! Help, if can, please. Viacheslav.
