Incoming SSDP UDP 1900 filtering

[phil.lavin at cloudcall.com (Phil Lavin)]

On Mon, 25 Mar 2019, marcel.duregards--- via NANOG wrote:
> As SSDP is used with PnP for local LAN service discovery, we are 
> thinking of:
>
> 1) educate our client (take a lot of time)
> 2) filter incoming SSDP packets (UDP port 1900 at least) in our bgp 
> border

Looking back at logs for VoIP calls over the past week (we are a small B2B telco), I see a fair number of RTP streams originating from UDP port 1900 on the customer side. Such filtering at the provider edge would have caused one way audio on these calls