[Snort-users] $HOME_NET question

Erek Adams erek at ...950...
Wed Jan 22 12:53:02 EST 2003


On Wed, 22 Jan 2003, Ralph Churchill wrote:

> I have snort 1.8.7. I have set my $HOME_NET to be
> $eth0_ADDRESS and my external net set to !$HOME_NET.
> However, I still get alerts from other computers on my
> subnet! For example, the "SNMP public access udp" rule
> says:
>
> alert udp $EXTERNAL_NET any -> $HOME_NET 161...
>
> For this example, assume my IP is 192.168.1.2. I'm
> getting  alerts for a packet from 172.20.39.32 to
> 192.168.1.3. Why?   I'm totally confused. I thought
> $HOME, if set to $eth0_ADDRESS would only give alerts
> for things coming into my IP?!?! Am I wrong?

Depends.

Where are the alerts coming from?  From rules or from one of the
preprocessors?  Can you post a copy of the error?  Can you post your
HOME_NET statement?

-----
Erek Adams

   "When things get weird, the weird turn pro."   H.S. Thompson




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