Re: More info, Network problems [PPP and IPMASQ]

Tony Lill (Tony.Lill@ajlc.waterloo.on.ca)
Sat, 08 Aug 1998 23:06:11 GMT


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Michael Driscoll <fenris@edgemail.com> writes:

> So the problem does not seem to be getting worse with 2.1.115 like
> I indicated. Perhaps it is just a problem with tcpdump, making the IP
> headers look corrupted?

Your mean stuff like this. Tcpdump is finding an extra 4 bytes before
the IP header on incomming packets. (This is on 2.1.113).

18:28:23.989064 199.85.118.209.1897 > 205.147.64.10.auth: S 1310880068:1310880068(0) win 15928 <mss 1460,sackOK,timestamp 53068969 0,nop,wscale 0> (DF)
4500 003c b685 4000 4006 3872 c755 76d1
cd93 400a 0769 0071 4e22 7144 0000 0000
a002 3e38 2ef7 0000 0204 05b4 0402 080a
0329 c4a9 0000 0000 0103 0300
18:28:24.679010 47.6.243.98 > 205.147.64.10: (frag 17664:-27@480) [tos 0x3]
ff03 0021 4500 003c 0c95 4000 2f06 f362
cd93 400a c755 76d1 0071 0769 21b6 9ecc
4e22 7145 a012 2238 57ae 0000 0204 05b4
0103 0300 0101 080a 001f 3597 0329 c4a9
18:28:24.679010 199.85.118.209.1897 > 205.147.64.10.auth: . ack 565616333 win 15928 <nop,nop,timestamp 53069038 2045335> (DF)
4500 0034 b68e 4000 4006 3871 c755 76d1
cd93 400a 0769 0071 4e22 7145 21b6 9ecd
8010 3e38 672d 0000 0101 080a 0329 c4ee
001f 3597
18:28:24.699009 199.85.118.209.1897 > 205.147.64.10.auth: P 0:9(9) ack 1 win 15928 <nop,nop,timestamp 53069040 2045335> (DF)
4500 003d b691 4000 4006 3865 c755 76d1
cd93 400a 0769 0071 4e22 7145 21b6 9ecd
8018 3e38 9472 0000 0101 080a 0329 c4f0
001f 3597 3130 3638 2c32 350d 0a
18:28:25.598939 47.6.243.93 > 205.147.64.10: (frag 17664:-13@416) [tos 0x3]
ff03 002f 4500 0034 0ca2 4000 2f06 f35d
cd93 400a c755 76d1 0071 0769 21b6 9ecd
4e22 714e 8010 222f 8329 0000 0101 080a
001f 3599 0329 c4f0
18:28:25.598939 47.6.243.46 > 205.147.64.10: (frag 17664:-13@728) [tos 0x3]
ff03 002f 4500 005b 0caa 4000 2f06 f32e
cd93 400a c755 76d1 0071 0769 21b6 9ecd
4e22 714e 8018 2238 3436 0000 0101 080a
001f 359a 0329 c4f0 3130 3638 202c 2032
3520 3a20
- --
Tony Lill, Tony.Lill@AJLC.Waterloo.ON.CA
President, A. J. Lill Consultants fax/data (519) 650 3571
539 Grand Valley Dr., Cambridge, Ont. N3H 2S2 (519) 241 2461
- --------------- http://www.ajlc.waterloo.on.ca/ ----------------
"Welcome to All Things UNIX, where if it's not UNIX, it's CRAP!"

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