Why is this rule still being tripped?

[Orion Poplawski <orion () cora nwra com>]

Running snort 2.1.0.

I've modified the icmp-info.rules to be of the following form:

alert icmp !$TRUSTED_NET any -> $HOME_NET any (msg:"ICMP PING"; itype: 
8; icode: 0; sid:384;  classtype:misc-activity; rev:4;)

and have the following NET definitions in snort.conf:

var TRUSTED_NET 
[65.171.192.0/24,192.168.0.0/24,65.104.69.192/27,207.202.149.0/24,12.105.80.64/27,69.9.9.160/27]
var HOME_NET [65.171.192.0/24,192.168.0.0/24]

but I'm still seeing the ICMP PING (and other) alerts showing up in my 
ACID console.

from the alert log:

[**] [1:384:4] ICMP PING [**]
[Classification: Misc activity] [Priority: 3]
01/08-16:44:11.055633 65.104.69.201 -> 65.171.192.100
ICMP TTL:253 TOS:0x0 ID:65224 IpLen:20 DgmLen:1500 DF
Type:8  Code:0  ID:0   Seq:0  ECHO

--
Orion Poplawski
System Administrator                   303-415-9701 x222
Colorado Research Associates/NWRA      FAX: 303-415-9702
3380 Mitchell Lane, Boulder CO 80301   http://www.co-ra.com



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