Hi Mike,

I think you said that any ICMP packets would be noticed, do you monitor the gateway connections as well?

I've seen some devices that send out relatively small TTL values and it can result in one way audio that is customer path specific. As mentioned before SIP/TLS is not a true VPN and the audio UDP will be hop counted across the Frontier network. They should send back an ICMP message when they droop the packet.

Just one more thing to check.  Good luck.

~Glen

On 3/10/2024 9:28, Mike Hammett via VoiceOps wrote:
I haven't been able to attribute it to malice or ignorance yet, just that it happens.



-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com



Midwest Internet Exchange
http://www.midwest-ix.com



------------------------------------------------------------------------
*From: *"Alex Balashov via VoiceOps" <[email protected]>
*To: *"VoiceOps" <[email protected]>
*Sent: *Saturday, March 9, 2024 7:57:33 AM
*Subject: *Re: [VoiceOps] One Way Audio - Frontier Comm (Los Angeles area)

No, it's true, consider me appropriately humbled. I underappreciated the nuance of this issue. I thought we were talking about something closer to the physicality of networks, not packet inspection/filtering/etc.

-- Alex

> On 9 Mar 2024, at 08:11, James Cloos <[email protected]> wrote:
>
>>>>>> "AB" == Alex Balashov writes:
>
>>> I don't trust last mile networks to reliably deliver SIP calls. I usually end up putting them into VPNs, TLS, etc.
>
> AB> VPNs and TLS make last-mile networks more reliable? :-)
>
> on the vpn side, wireguard (which runs over udp) certainly does.
>
> I imagine ipsec sometimes can, too.  but wg is easier.
>
> -JimC
> --
> James Cloos <[email protected]>
>            OpenPGP: https://jhcloos.com/0x997A9F17ED7DAEA6.asc

--
Alex Balashov
Principal Consultant
Evariste Systems LLC
Web: https://evaristesys.com
Tel: +1-706-510-6800

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