4 ms·
What do you mean the actual number? The number is set by the caller as part of the SIP INVITE
by nostrebored 7y ago
What do you mean the actual number? The number is set by the caller as part of the SIP INVITE
- beerandt 7y agoThe phone company has a source number for calls coming from outside their system for billing purposes. I want that number. Edit: At a minimum, an out of system call should display what system / exchange it originates from. That at least helps solve neighbor spoofing.
- Rapzid 7y agoYeah it's bonkers they allow this still. No good actor ISP is going to knowingly let improperly sourced traffic transit networks...
- xorcist 7y agoOh how I wish that was actually true.
- elif 7y agoI mean, yes there are bad actor ISP's that allow it, but his statement is accurate due to the caveat.
- kitteh 7y agoThe middle (ntt, gtt, tata, etc) of the internet doesn't know what is or isn't spoofed. The folks at the edge own that responsibility and most colo/hosting shops allow their customers to spoof. Their upstreams are powerless against them since they'll take their money elsewhere.
- kortilla 7y agoLol, that’s not the definition of “powerless”. There are many ISPs more than willing to reject peering with dumpsters.
- kitteh 7y agoNot talking about peering. Talking about transit-customer relationships. Think large hosting shops who say they can't afford to do uRPF on their customers because they've got so many multihomed users and the IP address space is fluid. Or smaller regional networks selling low cost transit. Some folks just have arbitrary limits (you must have x asns behind you for us to remove urpf)
- spc476 7y agoYeah, one would think that a national phone carrier would only send through properly sourced data. But I can tell you from experience that no, they let through garbage. I regularly see "phone numbers" like "11111111111111" or "0000000000" or even "01120155512121234". They act like they're the phone company and don't have to care ...