It works in theory, but to get every ISP and hosting provider to ACL their edges and maintain those ACL's for every customer no matter how large might be a bit difficult. Also, what about non-BGP customers or customers that just accept a default route? Or even customers that just want return traffic to come in a different link for some reason. ISP's would suddenly become giant traffic registries.
2012/2/8 George Bonser <gbon...@seven.com> > > > >From: Keegan Holley > > >How do you stop it? > > A provider knows what destination IP traffic they route TO a customer, > don't they? That should be the only source IPs they accept FROM a customer. > > > If you don't route it TO the customer, you shouldn't accept it FROM the > customer unless you have made special arrangements with them and verified > they are entitled to source the traffic from the desired IPs. > > > >
