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Recent Network Management News:

Comcast Support for Mutually Agreed Norms for Routing Security

The Internet Society (ISOC) has published Mutually Agreed Norms for Routing Security (MANRS), as a follow-up to their Routing Resilience Manifesto. Comcast joins ISOC and other network operators in calling for community action on this subject, and joining us to support this MANRS.

Primarily, adoption of the Mutually Agreed Norms for Routing Security requires that Internet Service Providers (ISPs) explicitly filter routing announcements received from their customer networks at the “prefix” level. Comcast has been employing this method for at least the past several years and expects neighboring networks to do the same.

Additionally, this calls for networks to take steps to prevent network spoofing, which is central to curtailing many amplification and/or distributed denial of service (DDoS) attacks. These attacks take advantage of the fact that some networks have not taken steps to prevent network address spoofing.

Comcast takes several steps to prevent network spoofing, and a list of FAQs on subject can be found here.

Finally, the Mutually Agreed Norms for Routing Security asks that ISPs maintain usable contact information and coordination capability for real-time troubleshooting between network operators, to which Comcast is also committed. We hope that other ISPs will adopt the guidance in the Mutually Agreed Norms for Routing Security in order that we may improve the stability and reliability of the Internet upon which we all depend. 

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