[Snort-users] How can write rule with a range IP?

CunningPike cunningpike at ...11827...
Mon Jan 28 17:05:10 EST 2008


And, generally speaking, the use of variables is preferable to 
hard-coding IP addresses into rules, e.g.:

var $SOME_NET [10.0.0.1,10.0.0.5,10.0.1.0/24]

alert $SOME_NET any -> any any ........

CP

Joel Esler wrote:
> Either seperate the multiple IP's that are in "[ ]" brackets with 
> commas, or if all your IP's are consecutive, you may use CIDR notation.
> 
> J
> 
> On Jan 27, 2008, at 3:15 AM, bahamin takhtaei wrote:
> 
>> Hi,
>> Please tell me How can write a rule in snort with a range IP, e.g.
>> alert  icmp   [10.0.0.21 : 151.43.23.76 , 12.5.6.7] any -> any 
>> (sid:2000000;)
>>
>> I checked this rule and found that snort only checks the first 
>> boundary of  range (10.0.0.21) in  packets!
>>
>> Thanks
>>
>>
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