JJB <[EMAIL PROTECTED]> schrieb: > Thanks for your example. I have finally had time to study it > and I see the flaw in it. > > The example works fine for creating the entry in the dynamic table > for setup of keep-state inbound and outbound session start requests. > It even handles inbound packets that are part of an established > session > conversations, But for established outbound session conversations > the check-state rule releases the packet before it has been nated.
No. 'check-state' does not unconditionally release a packet but performs the 'action'-part of the rule that installed the dynamic rule - in our case 'skipto 10000' where it gets nat'ed. > There lies in the flaw. > > Do you have any suggestions on how to correct this? Have you tried the script and it really failed? I just double-checked and it works fine on my system. Thomas > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Thomas Wolf > Sent: Thursday, June 03, 2004 3:00 AM > To: [EMAIL PROTECTED]; [EMAIL PROTECTED] > Subject: RE: does NATd _prevent_ use of stateful ipfw rules w/ > keep-state? > > > JJB <[EMAIL PROTECTED]> schrieb: > > > Where do you get off calling my questioning of Luigi Rizzo's > answer > > as an attack. > > I have heard that party line statement all to often over that last > 4 > > years, with no backup proof. That party line canned answer may be > > sufficient for the original thread poster who has not invested the > > time yet to come to the realization that it doe's not work. > > My post to the tread was meant to bring this problem out so the > > experts can look into it and take corrective actions. > > This should work although some features are missing > (loopback, anti-spoofing, identd..): > > #!/bin/sh > log="log" > cmd="ipfw add" > allow="skipto 10000" > oif=rl0 > good_tcp="22,25,53,80,443,110" > good_udp="53" > good_icmp="icmptypes 0,3,8,11,12" > ipfw -f flush > > $cmd 100 divert natd ip from any to any in via $oif > $cmd 105 check-state > $cmd 110 $allow icmp from any to any $good_icmp > $cmd 120 $allow udp from any to any $good_udp out keep-state > $cmd 130 $allow tcp from any to any $good_tcp out setup keep-state > $cmd 140 deny $log ip from any to any > $cmd 10000 divert natd ip from any to any out via $oif > $cmd 10010 allow ip from any to any > $cmd 10020 deny ip from any to any > > > Thomas > > -- > Thomas Wolf > Wiener Software Fabrik > Dubas u. Wolf GMBH > 1050 Wien, Mittersteig 4 > > _______________________________________________ > [EMAIL PROTECTED] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw > To unsubscribe, send any mail to > "[EMAIL PROTECTED]" > > _______________________________________________ > [EMAIL PROTECTED] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw > To unsubscribe, send any mail to "[EMAIL PROTECTED]" > -- Thomas Wolf Wiener Software Fabrik Dubas u. Wolf GMBH 1050 Wien, Mittersteig 4 _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
