Date: Sun, 9 Feb 1997 21:55:14 +1100 (EST) From: "Daniel O'Callaghan" <danny@panda.hilink.com.au> To: hackers@freebsd.org Subject: Chalmers.com.au mysterious problem. Message-ID: <Pine.BSF.3.91.970209214921.427M-100000@panda.hilink.com.au>
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I'm sure lots of people remember Robert Chalmers' problem with his Annex and TCP RFC1323 extensions. Well, with the Annex out of the circuit, there are still problems. I could connect to www.chalmers.com.au from my home CSLIP-connected machine, but not from any office machine. When Bob dropped his MTU/MRU to 296, matching my CSLIP connection, all worked. Jim Shankland kindly posted an analysis of tcpdump when fetching a WWW document. Below, is output of what Robert Chalmers saw when I tried to fetch a doc before he changed the MTU/MRU. Could some kind soul with more experience than I please translate it into English. Jim found that packet number 1 never reached him, although packet 2 did. Perhaps the trace below will help us to work out why. Thanks, Danny ---------- Forwarded message ---------- Date: Sun, 9 Feb 1997 16:05:52 +1000 (EST) From: Robert Chalmers <robert@nanguo.chalmers.com.au> To: Daniel O'Callaghan <danny@panda.hilink.com.au> Subject: Re: 19.log Hi Danny, the log from X.19 15:16:23.211557 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: S 1706172429:1706172429(0) win 16384 <mss 1460> (DF) [tos 0x10] 15:16:23.211830 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: S 3108632207:3108632207(0) ack 1706172430 win 17520 <mss 1460> (DF) 15:16:25.959225 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: S 1706172429:1706172429(0) win 16384 <mss 1460> (DF) [tos 0x10] 15:16:25.959375 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: . ack 1 win 17520 (DF) 15:16:25.966115 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: S 3108632207:3108632207(0) ack 1706172430 win 17520 <mss 1460> (DF) 15:16:30.610414 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: . ack 1 win 17520 (DF) [tos 0x10] 15:16:36.453179 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: P 1:17(16) ack 1 win 17520 (DF) [tos 0x10] 15:16:36.566078 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: . ack 17 win 17520 (DF) 15:16:37.285363 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: P 17:19(2) ack 1 win 17520 (DF) [tos 0x10] 15:16:37.291580 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: . 1:1461(1460) ack 19 win 17520 (DF) 15:16:37.291932 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: P 1461:2049(588) ack 19 win 17520 (DF) 15:16:42.272834 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: P 1:19(18) ack 1 win 17520 (DF) [tos 0x10] 15:16:42.273337 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: . 2049:2921(872) ack 19 win 17520 (DF) 15:16:42.966753 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: . 1:1461(1460) ack 19 win 17520 (DF) 15:16:53.604487 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: . 1:1460(1459) ack 19 win 17520 (DF) 15:16:53.604550 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: . 1460:1461(1) ack 19 win 17520 (DF) 15:16:53.840077 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: . ack 1 win 17520 (DF) [tos 0x10] 15:16:54.966751 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: . 1:1460(1459) ack 19 win 17520 (DF) 15:16:58.064670 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: . ack 1 win 17520 (DF) [tos 0x10] 15:17:05.622246 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: . ack 1 win 17520 (DF) [tos 0x10] 15:17:18.966844 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: . 1:1460(1459) ack 19 win 17520 (DF) 15:17:31.354969 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: P 19:27(8) ack 1 win 17520 (DF) [tos 0x10] 15:17:31.355154 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: R 3108632208:3108632208(0) win 0 15:17:35.328240 skylark.hilink.com.au.3634 > nanguo.chalmers.com.au.http: F 27:27(0) ack 1 win 17520 (DF) [tos 0x10] 15:17:35.328347 nanguo.chalmers.com.au.http > skylark.hilink.com.au.3634: R 3108632208:3108632208(0) win 16384 -- chalmers.com.au: P.O. Box 2003. Mackay. 4740 +61-0412-079025 robert@chalmers.com.au for Whirled Peas http://www.chalmers.com.au Location: The Great Australian Content Site. 21'7" S, 149'14" E.
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