nanog mailing list archives

Re: RFC1918 conformance


From: bmanning () ISI EDU (Bill Manning)
Date: Tue, 11 Feb 1997 08:16:21 -0800 (PST)

My standard in & out route filters are attached.
Everyone should use something like this.
      --asp () partan com (Andrew Partan)

! Deny martian routes
! 1st and last classical B and C nets (guard nets).
access-list 180 deny   ip 128.0.0.0 0.0.255.255 255.255.0.0 0.0.255.255
access-list 180 deny   ip 191.255.0.0 0.0.255.255 255.255.0.0 0.0.255.255
access-list 180 deny   ip 192.0.0.0 0.0.0.255 255.255.255.0 0.0.0.255
access-list 180 deny   ip 223.255.255.0 0.0.0.255 255.255.255.0 0.0.0.255

        In a classless environment, these prefixes are legitimate.
        Correct behaviour is now known for these subnets and so I
        wonder why you still have them in your standard list.


-- 
--bill
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