Date: Sun, 26 Mar 2000 11:47:57 -0500 From: Bob Fayne <bsd-lists@dnsdata.com> To: freebsd-net@FreeBSD.ORG Subject: PPP/PPPOE and NAT Message-ID: <4.3.2.20000326112757.00b3ae00@dnsdata.com>
next in thread | raw e-mail | index | archive | help
I've also been having a lot of trouble using NAT over a PPPoE connection. I'm using 3.4-RELEASE and noticed the problems right away. They still show up with the 0326-ppp. It seems like it's some sort of fragmentation issue. Most of my experience is with straight ethernet and not ppp. Anyway here's my ppp.conf... default: set device PPPoE:de0 set log Error Alert Warning Phase Chat IPCP CCP tun command set dial set timeout 60 set ifaddr 0.0.0.0 set cd 5 enable dns accept PAP set speed sync add 0 0 HISADDR enable lqr set redial 0 0 nat enable yes nat log yes set mru 1492 set mtu 1492 Bell: set authname xxxxxx set authkey yyyyyy I issue the command "ppp -ddial -nat Bell" as root and it connects just fine. Speed looks fine, pages load quickly, etc. But when I use Windows98 clients with the NAT, it doesn't go so well. The symptoms range from pretty much none with some pages (www.ibm.com), to missing banners(www.intellicast.com) to nothing at all with most pages. I used www.hp.com as a test. I did some tcpdumps to try and see where the break is. This is what I get when I try to load a page using the dsl connection: 08:19:00.716742 111.111.1.1.1105 > 192.151.11.32.80: S 1471379:1471379(0) win 8192 <mss 1460,nop,nop,sackOK> (DF) 08:19:00.813355 192.151.11.32.80 > 111.111.1.1.1105: S 31360000:31360000(0) ack 1471380 win 32768 <mss 1460> (DF) 08:19:00.813802 111.111.1.1.1105 > 192.151.11.32.80: . ack 1 win 8760 (DF) 08:19:00.817677 111.111.1.1.1105 > 192.151.11.32.80: P 1:354(353) ack 1 win 8760 (DF) 08:19:03.723892 111.111.1.1.1105 > 192.151.11.32.80: P 1:354(353) ack 1 win 8760 (DF) 08:19:03.870080 192.151.11.32.80 > 111.111.1.1.1105: . ack 354 win 32768 (DF) When I change the default route on this box to be the cable interface, this is what I get: 07:43:47.122168 111.111.1.1.1037 > 192.151.11.32.80: S 629054:629054(0) win 8192 <mss 1460,nop,nop,sackOK> (DF) 07:43:50.027428 111.111.1.1.1037 > 192.151.11.32.80: S 629054:629054(0) win 8192 <mss 1460,nop,nop,sackOK> (DF) 07:43:50.107253 192.151.11.32.80 > 111.111.1.1.1037: S 88448000:88448000(0) ack 629055 win 32768 <mss 1460> (DF) 07:43:50.107411 111.111.1.1.1037 > 192.151.11.32.80: . ack 1 win 8760 (DF) 07:43:50.110678 111.111.1.1.1037 > 192.151.11.32.80: P 1:354(353) ack 1 win 8760 (DF) 07:43:50.193727 192.151.11.32.80 > 111.111.1.1.1037: . ack 354 win 32768 (DF) 07:43:50.201616 192.151.11.32.80 > 111.111.1.1.1037: . 1:1461(1460) ack 354 win 32768 (DF) 07:43:50.202799 192.151.11.32.80 > 111.111.1.1.1037: . 1461:2921(1460) ack 354 win 32768 (DF) 07:43:50.203198 111.111.1.1.1037 > 192.151.11.32.80: . ack 2921 win 8760 (DF) 07:43:50.284190 192.151.11.32.80 > 111.111.1.1.1037: . 2921:4381(1460) ack 354 win 32768 (DF) 07:43:50.285364 192.151.11.32.80 > 111.111.1.1.1037: . 4381:5841(1460) ack 354 win 32768 (DF) 07:43:50.285781 111.111.1.1.1037 > 192.151.11.32.80: . ack 5841 win 8760 (DF) 07:43:50.286605 192.151.11.32.80 > 111.111.1.1.1037: . 5841:7301(1460) ack 354 win 32768 (DF) 07:43:50.364794 192.151.11.32.80 > 111.111.1.1.1037: . 7301:8761(1460) ack 354 win 32768 (DF) 07:43:50.365226 111.111.1.1.1037 > 192.151.11.32.80: . ack 8761 win 8760 (DF) 07:43:50.365996 192.151.11.32.80 > 111.111.1.1.1037: . 8761:10221(1460) ack 354 win 32768 (DF) 07:43:50.367277 192.151.11.32.80 > 111.111.1.1.1037: . 10221:11681(1460) ack 354 win 32768 (DF) 07:43:50.367667 111.111.1.1.1037 > 192.151.11.32.80: . ack 11681 win 8760 (DF) 07:43:50.399393 111.111.1.1.1038 > 192.151.11.32.80: S 632332:632332(0) win 8192 <mss 1460,nop,nop,sackOK> (DF) 07:43:50.400059 111.111.1.1.1039 > 192.151.11.32.80: S 632332:632332(0) win 8192 <mss 1460,nop,nop,sackOK> (DF) 07:43:50.400670 111.111.1.1.1040 > 192.151.11.32.80: S 632333:632333(0) win 8192 <mss 1460,nop,nop,sackOK> (DF) 07:43:50.444329 192.151.11.32.80 > 111.111.1.1.1037: . 11681:13141(1460) ack 354 win 32768 (DF) 07:43:50.445530 192.151.11.32.80 > 111.111.1.1.1037: . 13141:14601(1460) ack 354 win 32768 (DF) 07:43:50.445944 111.111.1.1.1037 > 192.151.11.32.80: . ack 14601 win 8760 (DF) 07:43:50.446788 192.151.11.32.80 > 111.111.1.1.1037: . 14601:16061(1460) ack 354 win 32768 (DF) Any help in getting this working will be appreciated. :) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4.3.2.20000326112757.00b3ae00>