How to drop mutiple IPs efficiently in using grok filter

[Chang-Suk_Kang]

I'd like to drop multiple ips in messaging.

I wrote config below. .

Sample : I waana drop message including ip (10.10.10.31 ~ 10.10.10.49)

===========================================================================
if [Src_IP] == "10.10.10.31" or [Src_IP] == "10.10.10.32" or [Src_IP] == "10.10.10.33" or [Src_IP] == "10.10.10.34" or ~~~~ or [Src_IP] == "10.10.10.49" { drop {} }

How do I check this config more efficiently??

Any Ideas?? Plz..

Thanks in advance. ^^;

[Badger]

Match the IP against a set of CIDR ranges that comprise the complete range you want to drop, then drop if the tag is present. For your example that would be

        address => "%{ip}"
        network => [ "10.10.10.31/32", "10.10.10.47/28", "10.10.10.48/31" ]
        add_tag => [ "matched" ]

[Chang-Suk_Kang]

Thanks, I try to... right now~ ^^;

[Chang-Suk_Kang]

It works Great!! Thanks a lot~ ^^;