Busy Signal Outgoing Calls

[VOIPoTim]

Hi Tim,

Thanks for all the hard work you guys did the last few days. It was rough sledding, but things look great right now.

Any idea if/why these attacks are intentionally targeting voipo?

Great info on the MTU limits. We'll know now to look for extraneous info like extra codecs, names, etc. in case BYOD users add any of that.

Thanks again, and now everyone go perform your preferred good luck rituals.

The attacks hopefully should be mitigated. They weren't intentional...just certain BYOD devices causing loops (think forwarding back to itself spawning tens of thousands of calls). We have a lot of loop detection/prevention in place but there was a new case we'd never seen before where it was happening with devices connecting using TCP and registrations looping in a way.

So far everything seems to be smooth now. This was happening on SIP but not SIP7 but then at one point to isolate things earlier in week, we redirected a lot of traffic from SIP to SIP7 while we tested that server more thoroughly and that's why SIP7 started acting up too (the users that had devices looping got moved). Once we isolated it and blocked it, we got things back to normal and added in logic to prevent it.

Hopefully smooth sailing now.

Also for what it's worth, we are in the midst of expanding the BYOD network with several new servers for you guys to choose from so there will be more choices in more DCs for you guys soon.

[racerdude]

Also for what it's worth, we are in the midst of expanding the BYOD network with several new servers for you guys to choose from so there will be more choices in more DCs for you guys soon.

This is great news Tim! Will there be one located close to Los Angeles and if so, are you planning on configuring these new servers like sip7 in which the audio is also proxied from the same server? And you mentioned earlier about the headers from BYOD devices, should we enable "compact headers" if our device supports it or does that setting make any difference?

[VOIPoTim]

This is great news Tim! Will there be one located close to Los Angeles and if so, are you planning on configuring these new servers like sip7 in which the audio is also proxied from the same server? And you mentioned earlier about the headers from BYOD devices, should we enable "compact headers" if our device supports it or does that setting make any difference?

Not 100% sure on locations yet, we've been testing a few options. We are planning to have the audio stream from the same location as the SIP server since it makes more sense if someone has a better connection to a certain datacenter that their audio goes through it too.

I'm not 100% and would need to check with my devs but I think compact headers would be preferred. Basically the less sent in headers the better.