Josh Karlin, University of New Mexico
The Internet's interdomain routing protocol, BGP, is vulnerable to a
number of damaging attacks primarily due to operator misconfiguration.
Proposed solutions with strong guarantees require a public-key
infrastructure, accurate routing registries, and changes to BGP. Until
such a large proposal is adopted, networks will remain vulnerable to false
information injected into BGP. However, BGP routers could avoid selecting
and propagating these routes if they were cautious about adopting new
reachability information. We describe a protocol-preserving enhancement to
BGP, Pretty Good BGP (PGBGP), that slows the dissemination of disruptive
routes, providing network operators time to respond before the problem
escalates into a large-scale Internet attack.
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