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Question on NAT Traversal

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imported_TopCat

Member
I have a question I couldn't find a straight answer to. I read that NAT Traversal would allow programs that require forwarded ports to run simultaneously on multiple pcs in a network. Does that mean it allows programs to run on multiple pcs by forwarding some of the port range to one pc and the rest to the other? Or would a program that only used one port, like a specific game during multiplay or FTP server, also be able to run simultaneously without any port forwarding or timeout issues on either host?
 
No...NAT-T stands for routers (NAT DEVICES) that allow VPN UDP packets to traverse them without modification.....in the case of IPsec, modifying the packet invaditates it and practicallly breaks IPSec since it detects the change and drops it due to design.

 
most server programs, such as ftp servers allow you to change the port that they listen on. This would be your only way to run multiple servers
 
depending on the router, you can nat multiple external IP's to multiple internal IP's. I know we did this with a Cisco 3500 series, and I'm pretty sure you can do this with iptables/linux.
 
you can do it with a 1700, 2600, 3600 and up series routers.
the 3500 you speak of is most likely a 3550 switch (it is layer3 - the 3524 and 3548 are layer 2)
I had assumed he was deling with a home network, my bad
 
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