North American Network Operators Group
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Re: Packets from net 10 (no, not the lyrics)
- From: bmanning
- Date: Tue Sep 23 09:28:32 1997
- Posted-date: Tue, 23 Sep 1997 06:16:08 -0700 (PDT)
> Should I be filtering all reserved space at my border, or would
> it be reasonable for me to expect the big guys not to take packets
> with clearly inappropriate source addresses?
Yes you should. (and with kudos to Andrew)
! Loopback
access-list 100 deny ip 127.0.0.0 0.255.255.255 255.0.0.0 0.255.255.255
! RFC 1918 private blocks
access-list 100 deny ip 10.0.0.0 0.255.255.255 255.0.0.0 0.255.255.255
access-list 100 deny ip 172.16.0.0 0.15.255.255 255.240.0.0 0.15.255.255
access-list 100 deny ip 192.168.0.0 0.0.255.255 255.255.0.0 0.0.255.255
! Test Network
access-list 100 deny ip 192.0.2.0 0.0.0.255 255.255.255.0 0.0.0.255
! Tiny networks.
access-list 100 deny ip any 255.255.255.128 0.0.0.127
access-list 100 permit ip any any
> Or is my view on the situation incomplete?
I think so.
--
--bill
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