Cisco-Like Features on Linux ? Like NAT

Does it exist cisco-like features on linux:

 - N.A.T - Network Adress Translation (Dynamic IP)
 - Per interface Bandwidth limit
 - High speed (2Mb/s) IP serial links

If not, is it really difficult to write these features ?
delete060397Asked:
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rfedaneCommented:

NAT is called IP firewall on Linux. You will need to build
support in the kernel for it. And then set up the Linux
machine a a gateway/firewall. The instruction on this is
available in the How-to docs and FAQ on www.linux.org.

To the best of my knowledge there is no  software available
to limit bandwidth.

High speed links are hardware issues, and first you would need to
find a PC card that supports 2Mb/s links like a Cisco 252x. In
which case you bought yourself a Cisco with all the features above anyways :-)
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delete060397Author Commented:
1 - The Linux Firewall with IP Masquerade are not really an IP/Network Adresses Translator. But yesterday, i've found a NAT for Linux beta program at the following URL:

**** http://www.csn.tu-chemnitz.de/~mha/linux-ip-nat/ ****
I hope this project will become a must, like masquerade :-)

2 - There's an available program to limit bandwidth but only for wu-ftp daemon for linux with a recent patch. It allow per-user bandwidth limitation. JYoungman@vggas.com has say me that is an available bandwith limit driver for 2.1.x linux developpment kernel called "shape driver" but i've not found this in my 2.1.8 (?)

3 - I now the method but i searching for linux-supported hardware list for this High speed serial links.

4 - I'm Sorry for my poor english ;-)

5 - Can i grade or give point to myself ? !!!!!!!!
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