Re: alerts on blacklisted IPs

["Joel Esler (jesler)" <jesler () cisco com>]

You can alert with the reputation preprocessor.  Just use the preprocessor rules set to alert.

--
Joel Esler
Sent from my iPhone

On Sep 1, 2014, at 5:00, "Victor-Alexandru Truica" <vat () mnworks dk<mailto:vat () mnworks dk>> wrote:


Hello,

I have a blacklist file containing multiple IP ranges. I want to create a general rule that will fire an alert like 
"Blacklisted interaction":

alert $HOME_NET any -> $BLACKLIST_DSHIELD any (msg:"Blacklist interaction";sid:1000100;)

Since the IPs and IP ranges are to many i thought that it would be too much of a hasle to define my ipvar like:

ipvar BLACKLISTED_IP [88.88.88.88,99.99.99.99,...]

Is it possible to create an ipvar that would load it's IPs from an external file, say like:

ipvar BLACKLISTED_IP [/root/blacklistfile]

Or

ipvar BLACKLISTED_IP include ipblacklist.txt

?

I've tried different variations of the path for "ipvar BLACKLISTED_IP [/root/blacklistfile]" but nothing worked.

PS - i've read a bit on the Reputation preprocessor (http://manual.snort.org/node175.html) but i don't want to " 
block/drop/pass" the packets, i just want an alert on this.



--
Victor-Alexandru Truica
Blog/Website : http://truica-victor.com
E-Mail : vat () mnworks dk<mailto:vat () mnworks dk>

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