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March 2004

Ensure secure routing protocols with access control best practices

Enterprises have hardened their perimeters with VPNs, firewalls and intrusion detection systems, but organizations need to focus more on securing routing protocols, the fundamental element of any corporate network, typically remain untouched. There are basic precautions everyone should take to control physical and logical access to routers. But these measures target the router itself, leaving the routing protocol communication unprotected, in part because security wasn't an explicit consideration when routing protocols evolved in the '80s and '90s. Many of the access control mechanisms inherent in routing protocols exist to avoid routing loops, not to deter malicious users from injecting false routing information. Nevertheless, by using combinations of route filtering and cryptographic authentication, you can defend your network against intruders bent on injecting invalid routing information to disrupt your network or view critical corporate data. In the March issue of Information Security magazine, we look at how vulnerable ...

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