[VoiceOps] Interesting proactive email from Telnyx

[Heath Eldeen]

That's probably a limitation on the Cloudflare side and not Telnyx
themselves choosing specific IPs over ranges.

- Heath


On Mon, Nov 15, 2021 at 9:50 AM Carlos Alvarez <caalvarez at gmail.com> wrote:

> We're just barely trying them out, mostly for SMS.  Prices seem pretty
> high compared to our other providers so it's really just a convenience/test
> at this point.  But this was interesting:
>
> Dear customer,
>
>
> Telnyx has reason to believe that sip.telnyx.com will be targeted in a
> subsequent DDoS attack tomorrow (Monday the 15th of Nov). During attacks,
> it is likely we will block traffic from non-trusted sources.
>
>
> To help achieve this Telnyx has proactively created a list of trusted IPs
> using customer authentication IPs, successful registrations, and historical
> traffic. However, we strongly encourage all customers to check their
> records and add any IP that they may be using, to their Access Control IP
> List as per the following instructions:
> https://telnyx.com/release-notes/allowed-ip-mission-control
> <http://email.mg.telnyx.com/c/eJydUU1zmzAQ_TVwYfBgBAgOHIypa3twJk7sOu2FkcXiqBGIChnH_vUVJG1Ij9Vo9LVv33u7oqRqCDvVhp9IoKxhUKu8EBVh-imNWc0UIwr4hIrKpB9g0Aiet-fjT6CqR-6A19dXy7buhdIcjHDrEWTHKFgrnUUVq0_Wl06HzCImblCU4ZivI1LrMDGozkWtpOAmi13HnerhO57nIDzBuCxxiEIPlQEqKBieU50mapAeHD7HbllQFxdRUToBQlM39EhwxEF59LALRYhNGVMiuWh17ufqePysVNMaaGa4Cz0_aPVFAgfSgl3r6lp9J5yLCxQ2a-yKta02btM31wZadCBFzgoDpe9Srv-PmOEGA0jndBrmPWZrvnyanX7lr7Pvq5egYQ-Y770ZLzfb5CG6_XDSJ3HOvl3O60u6yVC087vd105sss2yzI549wLJ4bCKFrZPkzvY3w67LlmsK1HN59vbfrnVFlA6LOOu_9__jQj-HPtqNUk0jZDjjAGNFL1CXpMKesS9ZBWR1zFEXZshdAeXloNSID9FoWq4bttfBlPFfeveN_tN0o6iIArwb_jr8nE>
>
>
> Thank you for your understanding,
>
> The Telnyx Team
>
>
> Thing is though, they don't seem to let you whitelist a subnet or range.
> Entering a couple dozen IPs is not great.
>
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