North American Network Operators Group|
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Spoofed Packet Tracker (Was Re: SMURF amplifier block list)
MCI has a tool to track spoofed packets, which is the orgin of any DoS today. You can get it from ftp.mci.net:/pub/security/dostrack742812.tar That will trace it to the edge of your network, then you need to work with the other providers to track it past that point. If it's within your network, you should filter it either by using ip verify unicast reverse-path on the serial interfaces or via acls. ip verify unicast reverse-path is a feature in the fib images by cisco. Most large nsp's run these images, and they're now mainline, so fire up your cco accounts and grab them. It drops packets that don't have the same return path, which works for most customers that are single homed. - Jared On a dark and stormy night, [email protected] said: > Cisco has a method of tracing SMuRF, do they not? Anyone know how they do > it?! Is it some imbedded thing, or do they call the owners of each > network and pray that they have Ciscos?