Hi, since two weeks i try to create rules for my iptables fw who let pass an vpn tunnel to my internel ms vpn server (pptp). i have installed the kernel 2.4.25 and patched it with patch-o-matic (only the pptp/gre patch aplied). i load the ip_conntrack_pptp, ip_conntrack_proto_gre, ip_nat_pptp and ip_nat_proto_gre modules, and my script looks so: iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 1723 -j DNAT --to-destination 192.168.1.2 iptables -A FORWARD -i eth0 -m state --state NEW -p tcp -d 192.168.1.2 --dport 1723 -j ACCEPT iptables -A FORWARD -i eth0 -m state --state NEW -p GRE -d 192.168.1.2 -j ACCEPT iptables -t nat -A PREROUTING -i eth0 -p GRE -j DNAT --to-destination 192.168.1.2 iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE iptables -I FORWARD 1 -m state --state ESTABLISHED,RELATED -j ACCEPT So whats wrong, becaus i can connect to the vpn server behind the firewall, but the connection hangs at the authentification. after some minutes i receive an message that the server does not respond. netstat say this: netstat-nat -d 192.168.1.2 Proto NATed Address Foreign Address State tcp p42821a5e.dip.t-dialin.ne:4394 192.168.1.2:1723 ESTABLISHED tcp p42821a5e.dip.t-dialin.ne:4392 192.168.1.2:1723 TIME_WAIT Scheme of my network: vpn-client -> hw-router -> internet -> hw-router -> firewall -> vpn-server so whats going wrong? Thanx Peter
