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Thank you, Comcast.

Subject: Thank you, Comcast.
From: blake at ispn.net (Blake Hudson)
Date: Fri, 26 Feb 2016 10:44:26 -0600
In-reply-to: <D2F5D3C1.129888%[email protected]>
References: <[email protected]> <[email protected]> <D2F5D3C1.129888%[email protected]>

Livingood, Jason wrote on 2/26/2016 9:12 AM:
> FWIW, Comcast's list of blocked ports is at http://customer.xfinity.com/help-and-support/internet/list-of-blocked-ports/. The suspensions this week are in direct response to reported abuse from amplification attacks, which we obviously take very seriously.
>
> We are in the process of considering adding some new ports to this block list right now, and one big suggestion is SSDP. If you have any others you wish to suggest please send them to me and the guy on the cc line (Nirmal Mody).
>
> Thanks!
> Jason
>
>

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) ? Is the downside of blocking 
(admittedly a small amount of) legitimate user traffic worth the upside? 
And is this practice /Open Internet/ friendly?

--Blake

Follow-Ups:
- Thank you, Comcast.
  - From: rdobbins at arbor.net (Roland Dobbins)
- Thank you, Comcast.
  - From: Jason_Livingood at comcast.com (Livingood, Jason)

References:
- Thank you, Comcast.
  - From: mcole.mailinglists at gmail.com (Maxwell Cole)
- Thank you, Comcast.
  - From: kmedcalf at dessus.com (Keith Medcalf)
- Thank you, Comcast.
  - From: Jason_Livingood at comcast.com (Livingood, Jason)

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