Date: Sat, 7 Apr 2001 03:49:26 -0500 (CDT) From: Nick Rogness <nick@rogness.net> To: Trevin Chow <tmchow@sfu.ca> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Natd - "failed to write packet back" Message-ID: <Pine.BSF.4.21.0104070346110.19859-100000@cody.jharris.com> In-Reply-To: <Pine.GSO.4.30.0104070037500.1058-100000@fraser.sfu.ca>
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On Sat, 7 Apr 2001, Trevin Chow wrote: > On Sat, 7 Apr 2001, Nick Rogness wrote: > > Do a `ipfw -a l` and send it. > > 00100 0 0 allow ip from any to any via lo0 > 00200 0 0 deny ip from any to 127.0.0.0/8 > 00300 0 0 deny log logamount 100 ip from 192.168.0.0/16 to any in recv fxp0 > 00400 0 0 deny log logamount 100 ip from 192.168.0.0/16 to any in recv fxp0 > 00500 0 0 deny log logamount 100 ip from 172.16.0.0/12 to any in recv fxp0 > 00600 0 0 deny log logamount 100 ip from 10.0.0.0/8 to any in recv fxp0 > 00700 0 0 deny log logamount 100 ip from any to 192.168.0.0/16 in recv fxp0 > 00800 0 0 deny log logamount 100 ip from any to 172.16.0.0/12 in recv fxp0 > 00900 0 0 deny log logamount 100 ip from any to 10.0.0.0/8 in recv fxp0 > 01000 0 0 deny ip from 0.0.0.0/8 to any in recv fxp0 > 01100 0 0 deny ip from 169.254.0.0/16 to any in recv fxp0 > 01200 0 0 deny ip from 192.0.2.0/24 to any in recv fxp0 > 01300 0 0 deny ip from 224.0.0.0/4 to any in recv fxp0 > 01400 0 0 deny ip from 240.0.0.0/4 to any in recv fxp0 > 01500 0 0 deny ip from any to 0.0.0.0/8 in recv fxp0 > 01600 0 0 deny ip from any to 169.254.0.0/16 in recv fxp0 > 01700 0 0 deny ip from any to 192.0.2.0/24 in recv fxp0 > 01800 1 28 deny ip from any to 224.0.0.0/4 in recv fxp0 > 01900 0 0 deny ip from any to 240.0.0.0/4 in recv fxp0 > 02000 0 0 divert 8668 ip from any to any via fxp0 > 02100 0 0 allow tcp from any to any established > 02200 0 0 allow ip from any to any via fxp1 > 02300 0 0 allow tcp from any to any in recv fxp0 established > 02400 0 0 allow tcp from 142.58.0.0/16 to <my_ext_ip> 2626 setup > 02500 0 0 allow tcp from 142.58.101.25 to <my_ext_ip> 2626 setup > 02600 0 0 allow tcp from 209.53.63.29 to <my_ext_ip> 2626 setup > 02700 0 0 allow log logamount 100 tcp from 142.58.101.25 to <my_ext_ip> 2627 in recv fxp0 setup > 02800 0 0 allow log logamount 100 tcp from 24.71.46.74 to <my_ext_ip> 2627 in recv fxp0 setup > 02900 0 0 allow log logamount 100 tcp from 209.53.63.29 to <my_ext_ip> 2627 in recv fxp0 setup > 03000 0 0 allow log logamount 100 tcp from 24.113.38.121 to <my_ext_ip> 2627 in recv fxp0 setup > 03100 0 0 allow tcp from any to <my_ext_ip> 80 setup > 03200 0 0 allow tcp from any to <my_ext_ip> 443 setup > 03300 0 0 allow tcp from any to <my_ext_ip> 25 setup > 03400 0 0 allow tcp from 192.168.0.0/16 to <my_ext_ip> 143 setup > 03500 0 0 allow tcp from 142.58.101.25 to <my_ext_ip> 143 setup > 03600 0 0 allow tcp from 209.53.63.29 to <my_ext_ip> 143 setup > 03700 0 0 allow udp from any to <my_ext_ip> 53 > 03800 0 0 allow udp from <my_ext_ip> 53 to any > 03900 0 0 allow tcp from any to <my_ext_ip> 53 setup > 04000 0 0 allow tcp from any to any 113 > 04100 0 0 allow log logamount 100 tcp from 209.53.63.29 to <my_ext_ip> 1241 > 04200 0 0 allow icmp from any to any via fxp1 > 04300 0 0 allow icmp from any to any in recv fxp0 icmptype 0 > 04400 0 0 allow icmp from any to any out xmit fxp0 icmptype 8 > 04500 0 0 allow icmp from any to any in recv fxp0 icmptype 3,11 > 04600 0 0 allow icmp from any to any via fxp0 icmptype 3,4,11,12 > 65532 0 0 deny log logamount 100 tcp from any to any in recv fxp0 setup > 65533 0 0 deny icmp from any to any > 65534 0 0 deny log logamount 100 ip from any to any > 65535 2 390 deny ip from any to any ^^^^^ Rule 65535 is denying your packets...You are not allowing valid traffic...which is why you are getting a "permission denied". I would recommend running a allow log rule before it to see what valid traffic looks like...then do your filtering after you know for sure stuff works. Nick Rogness <nick@rogness.net> - Keep on Routing in a Free World... "FreeBSD: The Power to Serve!" To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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