December 2004
Intermediate to advanced
448 pages
16h 40m
English
Content preview from Firewalls
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protected LAN. STUN will not work for all NATs and not for really
secure firewalls and may have some scalability and security issues.
The SIP client has to implement STUN and integrate it in the SIP
stack to make it work.
There are also various tunneling approaches, creating a tunnel
through the firewall and then having an ALG in a central place at the
SIP operator to cope with the separate address space of the private
LANs and their individual users. Special equipment is, therefore,
required at the SIP operator, and sometimes special equipment and
software are required on the LAN or in the SIP clients. With this
approach, the users get locked into a ...
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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.