[87096] in North American Network Operators' Group

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Re: blocking unallocated subnets

daemon@ATHENA.MIT.EDU (Randy Bush)
Fri Dec 2 15:11:17 2005

From: Randy Bush <randy@psg.com>
Date: Fri, 2 Dec 2005 10:10:29 -1000
To: Rob Thomas <robt@cymru.com>
Cc: nanog@merit.edu
Errors-To: owner-nanog@merit.edu


> Another option is to automate the updates and leave the hard work
> to us!

the op was discussing port-specific filtering for dns only.  could
you explain how i can automake my /etc/ipfw.rules leaving the hard
work to you?  e.g.

    add deny udp from 203.49.118.0/24 to any 53

randy


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