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Re: Martian list of IP's to block???
I used the ones Cisco outlined in their document IOS Essentials every ISP Should Know. Here is a copy of the list I use for out clients: deny ip host 0.0.0.0 any log deny ip 127.0.0.0 0.255.255.255 any log deny ip 10.0.0.0 0.255.255.255 any log deny ip 172.16.0.0 0.15.255.255 any log deny ip 192.168.0.0 0.0.255.255 any log deny ip xxx.xxx.xxx.0 0.0.0.255 any log deny ip 188.8.131.52 184.108.40.206 any log We are denyingy anyone that claims that their IP address is 0.0.0.0, Loopback addresses, all of the RFC 1918 addresses, address coming into us claiming they belong to our subnet, and multicast addresses. It seems to work for us. I also turn of ip directed broadcasts to minimize smurf/DoS attacks. If you would like a copy of the document I used, let me know and I'll e-mail a copy to you. Ron Fuller, CCDP, CCNP-ATM, CCNP-Security, MCNE, MCP 3X Corporation [email protected] "John M. Brown" <[email protected]>@merit.edu on 10/01/99 04:18:29 AM Sent by: [email protected] To: [email protected] cc: Subject: Martian list of IP's to block??? working on a document and was wondering if people could provide the various versions of the Martian list that is used... thanks