[Bro] Why do I get duplicate new_connection event?

Miles Grun milesgrun at yahoo.com
Thu Mar 15 18:24:11 PDT 2007


Hi Again,

I would like to post the pcap file (test.1) that caused double new_connection messages. My
previous email contained this file in uuencoded format, however, I have discovered that the email
system somehow substituted @ with `at` in message body. 
Since I do not know how to work around this problem and/or post a binary file, I am posting the
fully decoded pcap file instead. I hope somebody can point the reason for double new connection
messages quickly.

Best regards,

$ tcpdump -r    test.1 -XX -n
16:05:39.741946 IP 190.84.172.89.2278 > 222.37.1.55.80: S 
3585205640:3585205640(0) win 5840 <mss 1460,sackOK,timestamp 4795498 0,nop,wscale 0>
	0x0000:  214c b7cd a2a0 0030 65d5 5e08 0800 4500  !L.....0e.^...E.
	0x0010:  003c c9e2 4000 4006 26cf be54 ac59 de25  .<.. at .@.&..T.Y.%
	0x0020:  0137 08e6 0050 d5b1 e588 0000 0000 a002  .7...P..........
	0x0030:  16d0 f608 0000 0204 05b4 0402 080a 0049  ...............I
	0x0040:  2c6a 0000 0000 0103 0300                 ,j........
16:05:40.081079 IP 222.37.1.55.80 > 190.84.172.89.2278: S 
3552369456:3552369456(0) ack 3585205641 win 1460 <mss 1460,sackOK,timestamp 
658637388 4795498,nop,wscale 0>
	0x0000:  214c b7cd a2a0 0800 2b9e 8899 0800 4500  !L......+.....E.
	0x0010:  003c 262b 4000 3606 d486 de25 0137 be54  .<&+ at .6....%.7.T
	0x0020:  ac59 0050 08e6 d3bc db30 d5b1 e589 a012  .Y.P.....0......
	0x0030:  05b4 2e98 0000 0204 05b4 0402 080a 2742  ..............'B
	0x0040:  024c 0049 2c6a 0103 0300                 .L.I,j....
16:05:40.083354 IP 190.84.172.89.2278 > 222.37.1.55.80: . ack 1 win 
5840 <nop,nop,timestamp 4795532 658637388>
	0x0000:  214c b7cd a2a0 0030 65d5 5e08 0800 4500  !L.....0e.^...E.
	0x0010:  0034 c9e3 4000 4006 26d6 be54 ac59 de25  .4.. at .@.&..T.Y.%
	0x0020:  0137 08e6 0050 d5b1 e589 d3bc db31 8010  .7...P.......1..
	0x0030:  16d0 4c1f 0000 0101 080a 0049 2c8c 2742  ..L........I,.'B
	0x0040:  024c                                     .L
16:05:40.090794 IP 190.84.172.89.2278 > 222.37.1.55.80: P 1:626(625) 
ack 1 win 5840 <nop,nop,timestamp 4795532 658637388>
	0x0000:  214c b7cd a2a0 0030 65d5 5e08 0800 4500  !L.....0e.^...E.
	0x0010:  02a5 c9e4 4000 4006 2464 be54 ac59 de25  .... at .@.$d.T.Y.%
	0x0020:  0137 08e6 0050 d5b1 e589 d3bc db31 8018  .7...P.......1..
	0x0030:  16d0 02ce 0000 0101 080a 0049 2c8c 2742  ...........I,.'B
	0x0040:  024c                                     .L
16:05:40.443563 IP 222.37.1.55.80 > 190.84.172.89.2278: . ack 626 win 
31856 <nop,nop,timestamp 658637423 4795532>
	0x0000:  214c b7cd a2a0 0800 2b9e 8899 0800 4500  !L......+.....E.
	0x0010:  0034 264d 4000 3606 d46c de25 0137 be54  .4&M at .6..l.%.7.T
	0x0020:  ac59 0050 08e6 d3bc db31 d5b1 e7fa 8010  .Y.P.....1......
	0x0030:  7c70 e3ea 0000 0101 080a 2742 026f 0049  |p........'B.o.I
	0x0040:  2c8c                                     ,.
16:05:43.331707 IP 222.37.1.55.80 > 190.84.172.89.2278: P 1:206(205) 
ack 626 win 31856 <nop,nop,timestamp 658637723 4795532>
	0x0000:  214c b7cd a2a0 0800 2b9e 8899 0800 4500  !L......+.....E.
	0x0010:  0101 26e5 4000 3606 d307 de25 0137 be54  ..&. at .6....%.7.T
	0x0020:  ac59 0050 08e6 d3bc db31 d5b1 e7fa 8018  .Y.P.....1......
	0x0030:  7c70 3e52 0000 0101 080a 2742 039b 0049  |p>R......'B...I
	0x0040:  2c8c                                     ,.
16:05:43.334165 IP 190.84.172.89.2278 > 222.37.1.55.80: . ack 206 win 
6432 <nop,nop,timestamp 4795857 658637723>
	0x0000:  214c b7cd a2a0 0030 65d5 5e08 0800 4500  !L.....0e.^...E.
	0x0010:  0034 c9e5 4000 4006 26d4 be54 ac59 de25  .4.. at .@.&..T.Y.%
	0x0020:  0137 08e6 0050 d5b1 e7fa d3bc dbfe 8010  .7...P..........
	0x0030:  1920 43fd 0000 0101 080a 0049 2dd1 2742  ..C........I-.'B
	0x0040:  039b                                     ..
16:05:43.478567 IP 190.84.172.89.2278 > 222.37.1.55.80: P 626:1262(636) 
ack 206 win 6432 <nop,nop,timestamp 4795871 658637723>
	0x0000:  214c b7cd a2a0 0030 65d5 5e08 0800 4500  !L.....0e.^...E.
	0x0010:  02b0 c9e6 4000 4006 2457 be54 ac59 de25  .... at .@.$W.T.Y.%
	0x0020:  0137 08e6 0050 d5b1 e7fa d3bc dbfe 8018  .7...P..........
	0x0030:  1920 7749 0000 0101 080a 0049 2ddf 2742  ..wI.......I-.'B
	0x0040:  039b                                     ..
16:05:43.692464 IP 222.37.1.55.80 > 190.84.172.89.2278: P 206:410(204) 
ack 1262 win 31856 <nop,nop,timestamp 658637762 4795871>
	0x0000:  214c b7cd a2a0 0800 2b9e 8899 0800 4500  !L......+.....E.
	0x0010:  0100 26fb 4000 3606 d2f2 de25 0137 be54  ..&. at .6....%.7.T
	0x0020:  ac59 0050 08e6 d3bc dbfe d5b1 ea76 8018  .Y.P.........v..
	0x0030:  7c70 00af 0000 0101 080a 2742 03c2 0049  |p........'B...I
	0x0040:  2ddf                                     -.
16:05:43.694853 IP 190.84.172.89.2278 > 222.37.1.55.80: . ack 410 win 
7504 <nop,nop,timestamp 4795893 658637762>
	0x0000:  214c b7cd a2a0 0030 65d5 5e08 0800 4500  !L.....0e.^...E.
	0x0010:  0034 c9e7 4000 4006 26d2 be54 ac59 de25  .4.. at .@.&..T.Y.%
	0x0020:  0137 08e6 0050 d5b1 ea76 d3bc dcca 8010  .7...P...v......
	0x0030:  1d50 3c3a 0000 0101 080a 0049 2df5 2742  .P<:.......I-.'B
	0x0040:  03c2                                     ..
16:05:43.838441 IP 190.84.172.89.2278 > 222.37.1.55.80: P 
1262:1895(633) ack 410 win 7504 <nop,nop,timestamp 4795907 658637762>
	0x0000:  214c b7cd a2a0 0030 65d5 5e08 0800 4500  !L.....0e.^...E.
	0x0010:  02ad c9e8 4000 4006 2458 be54 ac59 de25  .... at .@.$X.T.Y.%
	0x0020:  0137 08e6 0050 d5b1 ea76 d3bc dcca 8018  .7...P...v......
	0x0030:  1d50 5520 0000 0101 080a 0049 2e03 2742  .PU........I..'B
	0x0040:  03c2                                     ..
16:05:44.048642 IP 222.37.1.55.80 > 190.84.172.89.2278: P 410:614(204) 
ack 1895 win 31856 <nop,nop,timestamp 658637799 4795907>
	0x0000:  214c b7cd a2a0 0800 2b9e 8899 0800 4500  !L......+.....E.
	0x0010:  0100 2715 4000 3606 d2d8 de25 0137 be54  ..'. at .6....%.7.T
	0x0020:  ac59 0050 08e6 d3bc dcca d5b1 ecef 8018  .Y.P............
	0x0030:  7c70 d64d 0000 0101 080a 2742 03e7 0049  |p.M......'B...I
	0x0040:  2e03                                     ..
16:05:44.051076 IP 190.84.172.89.2278 > 222.37.1.55.80: . ack 614 win 
8576 <nop,nop,timestamp 4795929 658637799>
	0x0000:  214c b7cd a2a0 0030 65d5 5e08 0800 4500  !L.....0e.^...E.
	0x0010:  0034 c9e9 4000 4006 26d0 be54 ac59 de25  .4.. at .@.&..T.Y.%
	0x0020:  0137 08e6 0050 d5b1 ecef d3bc dd96 8010  .7...P..........
	0x0030:  2180 347c 0000 0101 080a 0049 2e19 2742  !.4|.......I..'B
	0x0040:  03e7                                     ..
16:05:51.518485 IP 190.84.172.89.2278 > 222.37.1.55.80: F 1895:1895(0) 
ack 614 win 8576 <nop,nop,timestamp 4796676 658637799>
	0x0000:  214c b7cd a2a0 0030 65d5 5e08 0800 4500  !L.....0e.^...E.
	0x0010:  0034 c9ea 4000 4006 26cf be54 ac59 de25  .4.. at .@.&..T.Y.%
	0x0020:  0137 08e6 0050 d5b1 ecef d3bc dd96 8011  .7...P..........
	0x0030:  2180 3190 0000 0101 080a 0049 3104 2742  !.1........I1.'B
	0x0040:  03e7                                     ..
16:05:51.835071 IP 222.37.1.55.80 > 190.84.172.89.2278: . ack 1896 win 
31856 <nop,nop,timestamp 658638566 4796676>
	0x0000:  214c b7cd a2a0 0800 2b9e 8899 0800 4500  !L......+.....E.
	0x0010:  0034 28e0 4000 3606 d1d9 de25 0137 be54  .4(. at .6....%.7.T
	0x0020:  ac59 0050 08e6 d3bc dd96 d5b1 ecf0 8010  .Y.P............
	0x0030:  7c70 d3a0 0000 0101 080a 2742 06e6 0049  |p........'B...I
	0x0040:  3104                                     1.
16:05:51.835299 IP 222.37.1.55.80 > 190.84.172.89.2278: F 614:614(0) 
ack 1896 win 31856 <nop,nop,timestamp 658638566 4796676>
	0x0000:  214c b7cd a2a0 0800 2b9e 8899 0800 4500  !L......+.....E.
	0x0010:  0034 28e1 4000 3606 d1d8 de25 0137 be54  .4(. at .6....%.7.T
	0x0020:  ac59 0050 08e6 d3bc dd96 d5b1 ecf0 8011  .Y.P............
	0x0030:  7c70 d39f 0000 0101 080a 2742 06e6 0049  |p........'B...I
	0x0040:  3104                                     1.
16:05:51.839189 IP 190.84.172.89.2278 > 222.37.1.55.80: . ack 615 win 
8576 <nop,nop,timestamp 4796708 658638566>
	0x0000:  214c b7cd a2a0 0030 65d5 5e08 0800 4500  !L.....0e.^...E.
	0x0010:  0034 0000 4000 ff06 31b9 be54 ac59 de25  .4.. at ...1..T.Y.%
	0x0020:  0137 08e6 0050 d5b1 ecf0 d3bc dd97 8010  .7...P..........
	0x0030:  2180 2e70 0000 0101 080a 0049 3124 2742  !..p.......I1$'B
	0x0040:  06e6                                     ..
-


 
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