[Snort-users] Interesting traffic...

Mark Mason mark.mason at ...5051...
Tue Feb 26 14:14:06 EST 2002


Finally some interesting traffic. I know the IP is spoofed, but is there any
way snort might have gotten the direction of the traffic confused ? As it is
it appears to come from inside my network (it could happen) the obscured
address is a real IP, but doesn't appear to be up now. It is interesting
that the MSS is very high on the first packet. Any idea what this could be
caused by ?

[**] [1:528:2] BAD TRAFFIC loopback traffic [**]
[Classification: Potentially Bad Traffic] [Priority: 2]
02/26-11:25:30.667238 127.0.0.1:15158 -> xxx.xxx.xxx.xxx:6473
TCP TTL:63 TOS:0x0 ID:9155 IpLen:28 DgmLen:68 DF
IP Options (2) => LSRR NOP 
******S* Seq: 0x1BE3F7DA  Ack: 0x0  Win: 0xFFFF  TcpLen: 40
TCP Options (6) => MSS: 16344 NOP WS: 1 NOP NOP TS: 281854 0 

[**] [1:528:2] BAD TRAFFIC loopback traffic [**]
[Classification: Potentially Bad Traffic] [Priority: 2]
02/26-11:25:33.657238 127.0.0.1:15158 -> xxx.xxx.xxx.xxx:6473
TCP TTL:63 TOS:0x0 ID:9156 IpLen:28 DgmLen:68 DF
IP Options (2) => LSRR NOP 
******S* Seq: 0x1BE3F7DA  Ack: 0x0  Win: 0xFFFF  TcpLen: 40
TCP Options (6) => MSS: 1460 NOP WS: 1 NOP NOP TS: 282154 0 

[**] [1:528:2] BAD TRAFFIC loopback traffic [**]
[Classification: Potentially Bad Traffic] [Priority: 2]
02/26-11:25:36.657238 127.0.0.1:15158 -> xxx.xxx.xxx.xxx:6473
TCP TTL:63 TOS:0x0 ID:9157 IpLen:28 DgmLen:68 DF
IP Options (2) => LSRR NOP 
******S* Seq: 0x1BE3F7DA  Ack: 0x0  Win: 0xFFFF  TcpLen: 40
TCP Options (6) => MSS: 1460 NOP WS: 1 NOP NOP TS: 282454 0 








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