Thank you, Comcast.

Livingood, Jason Jason_Livingood at
Fri Feb 26 19:32:10 UTC 2016

On 2/26/16, 11:44 AM, "Blake Hudson" <blake at<mailto:blake at>> wrote:
Jason, how do you propose to block SSDP without also blocking legitimate traffic as well (since SSDP uses a port > 1024 and is used as part of the ephemeral port range on some devices) ?

As Roland suggested, very likely via UDP/1900. This will obviously be disclosed in advance to customers and tested thoroughly. I believe a few other ISPs have already taken this step.

And is this practice Open Internet friendly?

Port blocking is considered a form of reasonable network management provided it can be justified by security or operational stability reasons. Of course it must also be transparently disclosed and so on.


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