Thank you all for responding, I compiled 2.81 and see snort running however
i could use more help as no data were captured although i see the data from
tcpdump with the same machine. I also try removing all the default rules
running snort with only 1 to avoid any contaminations. perhaps i missed
something?
~ Tim
alert tcp any any -> $HOME_NET 13001 (msg: "GPRMC found in packet"; \
flow:to_server,established; content:"|24|GPRMC"; nocase; sid:9999000;)
TCPDUMP results
16:26:09.941940 IP 209.31.36.15.ptr.us.xo.net.13001 >
66.xxx.xxx.xxx.static.xxx.com.26334: S 664514795:664514795(0) ack 6516 win
5840 <mss 1460>
0x0000: 4500 002c 0000 4000 4006 7202 d11f 240f E..,..@.@.r...$.
0x0010: 42d8 90c3 32c9 66de 279b b0eb 0000 1974 B...2.f.'......t
0x0020: 6012 16d0 2cda 0000 0204 05b4 `...,.......
16:26:11.264892 IP 66.216.144.195.static.dejazzd.com.26334 >
209.xxx.xxx.xxx.ptr.xxx.net.13001: P 1:137(136) ack 1 win 8096
0x0000: 4500 00b0 0004 4000 eb06 c679 42d8 90c3 E.....@....yB...
0x0010: d11f 240f 66de 32c9 0000 1974 279b b0ec ..$.f.2....t'...
0x0020: 5018 1fa0 8f42 0000 0604 8319 8800 0000 P....B..........
0x0030: 6100 0000 2533 3536 3933 3930 3130 3030 a...%35693901000
0x0040: 3036 3736 2c24 4750 524d 432c 3030 3137 0676,$GPRMC,0017
0x0050: 3432 2e30 3030 2c41 2c33 3335 372e 3631 42.000,A,3357.61
0x0060: 3638 2c4e 2c31 3137 3536 2e38 3639 362c 68,N,11756.8696,
0x0070: 572c 302e 3030 2c2c 3237 3132 3037 2c2c W,0.00,,271207,,
0x0080: 2c41 2c2b 3132 3133 3833 3936 3635 332c ,A,+12138396653,
0x0090: 4e30 3338 6400 0000 0000 0000 0000 0000 N038d...........
0x00a0: 0000 0000 0000 0000 0000 0000 ffff ffff ................
16:26:11.264922 IP 209.31.36.15.ptr.us.xo.net.13001 >
66.xxx.xxx.xxx.static.xxx.com.26334: . ack 137 win 6432
0x0000: 4500 0028 9c41 4000 4006 d5c4 d11f 240f E..(.A@.@.....$.
0x0010: 42d8 90c3 32c9 66de 279b b0ec 0000 19fc B...2.f.'.......
0x0020: 5010 1920 41bf 0000 P...A...
Snort started with this command.
46480 29072 ? S Dec24 2:05 /home/user1/snort/snort-
2.8.0.1/src/snort -Qc /home/user1/snort/snort-2.8.0.1/etc/snort.conf -l
/var/log/snort/
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