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Date:      Tue, 30 Jan 2001 00:11:04 -0800 (PST)
From:      Trevin Chow <tmchow@sfu.ca>
To:        <questions@freebsd.org>
Subject:   NAT doesn't work? Telnet neither!
Message-ID:  <Pine.GSO.4.30.0101300008230.27334-100000@fraser.sfu.ca>

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I wrote to the list about my NAT problems and on the advice of some of the
list members, I've been trying to log the traffic to see what rules in my
firewall are perhaps causing problems.

Well I still haven't figured it out, but I found out today I can't even
telnet out of the box.. well it reaches the external host okay and says
its connected, but right before the "login:" prompt comes up, it says
"Connection closed by foreign host".

I've zero'd out my ipfw counts and just tried doing a telnet to an
external host. Here's the output:

00100 9 398 divert 8668 ip from any to any via dc0
00100 4 526 allow ip from any to any via lo0
00200 0   0 deny ip from any to 127.0.0.0/8
00300 8 354 allow tcp from any to any established
00400 1  44 allow ip from any to any out xmit dc0
00500 0   0 allow ip from any to any via fxp0
00600 0   0 allow ip from any to any via fxp1
00700 0   0 allow tcp from any to any in recv dc0 established
00800 0   0 allow tcp from any to 209.53.60.139 2626 setup
00900 0   0 allow log logamount 100 tcp from any to 209.53.60.139 2627 in
recv dc0 setup
01000 0   0 allow tcp from any to 209.53.60.139 80 setup
01100 0   0 allow tcp from any to 209.53.60.139 25 setup
01200 0   0 allow udp from any to any
01300 0   0 allow udp from any to any 53 via dc0
01400 0   0 allow udp from any to 209.53.60.139 53
01500 0   0 allow udp from 209.53.60.139 53 to any
01600 0   0 allow tcp from any to 209.53.60.139 53 setup
01700 0   0 deny log logamount 100 tcp from any to any in recv dc0 setup
01800 0   0 allow icmp from any to any via fxp0
01900 0   0 allow icmp from any to any via fxp1
02000 0   0 allow icmp from any to any in recv dc0 icmptype 0
02100 0   0 allow icmp from any to any out xmit dc0 icmptype 8
02200 0   0 allow udp from any to any 33434-33523 out xmit dc0
02300 0   0 allow icmp from any to any via dc0 icmptype 3,4,11,12
65532 0   0 deny log logamount 100 udp from any to any
65533 0   0 deny icmp from any to any
65534 0   0 deny log logamount 100 ip from any to any
65535 0   0 deny ip from any to any

Hopefully we can figure out what's wrong with my telnet capability and
then I'll be able to figure out what's wrong with NAT.



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