July 2017
Intermediate to advanced
434 pages
12h 59m
English
Content preview from FreeSWITCH 1.8
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Separating interfaces and restricting traffic
SIP is a technology that is commonly targeted for abuse on the open Internet. In most cases, malicious hackers will attempt to scan a range of IP addresses by sending UDP packets on port 5060 and look for servers that respond. Once they find a server which responds, they will attempt to brute-force common passwords or simply try to dial out. In some cases they will also simply flood the server with fake registration or other packets, crippling the system's ability to operate properly.
In average, a SIP server begins to be probed by hackers and script kiddies 30 minutes after is connected to the Internet. If you trace SIP packets, you'll see a lot of REGISTER attempts, or INVITE attempts, by user-agents ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.