[lug] Blocking spam by blocking partial IP

Bill Thoen bthoen at gisnet.com
Mon May 9 08:33:13 MDT 2005

I have been getting about 200 spams a day, and finally decided to simply 
block the two worst offenders by putting their partial IP's in my 
/etc/mail/access file like so:

218.1   REJECT
222     REJECT

This worked great. Last night's log showed lots and lots of messages 
from these turkeys that got turned back at the door.

However, I'm a bit concerned about blocking everything from IPs that start 
with 222. When I check with whois, I can't get any details on who is 
assigned to any of the subnets under 222. I don't mind blockng anybody 
from China or Korea, but I don't want to block Japanese or Australian 

Is there any way to discover any more details on the 222 IP other than
it's managed by APNIC? 

- Bill Thoen

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