search for: ipext

...9;'ve PPTP Server running behind Shorewall. The PPTP server is working OK in my LAN, but I want to connect outside and It isn''t working. I''ve configurate shorewall like http://www.shorewall.net/PPTP.htm. I add only this lines in my rules DNAT net loc:165.182.15.15 tcp 1723 - IPext DNAT net loc:165.182.15.15 47 - - IPext It isn''t working. the log is : Apr 13 19:28:32 FWONP pptpd[3118]: MGR: Launching /usr/sbin/pptpctrl to handle client Apr 13 19:28:32 FWONP pptpd[3118]: CTRL: local address = 10.200.10.2 Apr 13 19:28:32 FWONP pptpd[3118]: CTRL: remote address...

..... of course probably without checks for IP spoofing.... But still I suggest reading the papers that exist on the net .. and especially the 3rd one in this list....: 1. Security Problems in the TCP/IP Protocol Suite -- S.M. Bellovin then of AT&T ftp://research.att.com/dist/internet_security/ipext.ps.Z 2. A Weekness in the 4.2 BSD Unix TCP/IP Software -- R.T. Morris then of AT&T ftp://research.att.com/dist/internet_security/117.ps.Z *3.* Network (In)Security Through IP Packet Filtering -- D. Brent Chapman ftp://coast.cs.purdue.edu/pub/doc/firewalls/Brent_Chapman_packet_filtering.ps.Z...