North American Network Operators Group
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Re: Effective ways to deal with DDoS attacks?

  • From: Ralph Doncaster
  • Date: Mon May 06 19:09:16 2002 
> What's NANOG's opinion: assuming that uRPF is implemented on all
> customer interfaces, are there any legitimate purposes for a customer to
> forward packets with source IP addresses not currently routed by the
> transit provider towards the customer (either static or BGP)?

IP Tunneling - it often makes more sense to send packets out that have a
source address reachable only through the tunnel.