Hi. I have installed a firewall (IpCop 1.4.10 distribution) into my office lan. We have 4 vpn/pptp account on external server of our customer for our remote assistance. I have configured that account into my XP client and ..... - without firewall ----> all account works correctly - with firewall -------> 3 account works correctly and 1 don't connect !!!! Into log of my firewall I see that GRE packet from external server with problem (which mount a CISCO PIX) are blocked from my firewall, as it isn't able to nat (or conntrack) that. If I try from another office with another linux firewall (supported by another people) all works correctly. Maintainer of CISCO PIX of customer with problem, connect from his office (with a linux firewall) and vpn connection correctly works. My configuration is (you can also view modules here: http://www.ipcop.org/modules.php?op=modload&name=phpWiki&fil e=index&pagename=IPCopSoftwares Kernel: 2.4.31 Iptables: 1.2.11 ip_conntrack version 2.1 ip_conntrack_pptp version 1.9 loaded ip_nat_pptp version 1.5 loaded And I have also modules ip_nat_proto_gre ip_conntrack_proto_gre ---- (other vpn/pptp works correctly) Note that I have also forwarded input 1723 connection on my internal PPTP server (for come-in vpn connection) whitout problem. What kind of problem I have???? Thanks you. -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.2/253 - Release Date: 07/02/2006
