[ale] A snort newbie question

[James CE Johnson]

I'm having a bit of trouble configuring snort on my firewall/gateway. At 
least, I think I am...

eth0 is my internal interface, eth1 is connected to my cable modem.

In snort.conf I have:
    var HOME_NET 192.168.42.0/24
    var EXTERNAL_NET $eth1_ADDRESS

And I fire up snort thusly:
    snort -Afull -i eth1 -c /etc/snort/snort.conf -D

I then login to a host external to my network and telnet back to my 
webserver. When I throw the default.ida yack at it I don't see anything 
in my snort logs. The only way I can get anything in the snort logs is 
to change both *_NET values to 'any' but then I get alerts about 
legitimate traffic I generate inside my network.

Suggestions?


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