Thank you, Comcast.

John Levine johnl at
Fri Feb 26 21:06:10 UTC 2016

>The difference in blocking any of the existing ports on your list and 
>blocking UDP/1900 is that the ports on your list are all registered 
>ports. Port 1900 is not registered -

IANA is under the impression it's registered for SSDP.  Do you have
some reason to believe they're mistaken?

More information about the NANOG mailing list