Re: packet logging

[Matt Kettler <mkettler () evi-inc com>]

At 03:07 PM 7/23/2003 +0800, cc wrote:
> I'm just testing snort right now and was wondering if someone
> could tell me if the following rule is wrong:
>
> alert tcp any any -> $LAN any ( content: "GET /banner/"; \
>                                 msg: "banner test";)
>
> It's in the myrules.rules file and is included in the
> snort.conf file.
>
> If a user from a workstation goes to a website and the
> website sends a banner, shouldn't there be a log?

No, becaause the GET command will go FROM the lan not TO it.

You would want:


alert tcp $LAN any -> any any ( content: "GET /banner/"; \
                 msg: "banner test";)

Or for efficiency of not checking _EVERY_ tcp packet only check useful ones 
going to a normal http server:

alert tcp $LAN any -> any 80 ( content: "GET /banner/"; flags:A+; \
                 msg: "banner test";)



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