At 04:24 PM 4/14/01 -0400, Fred Danson wrote:
>Hey Group,
>
>I am considering buying a small Netgear/Linksys router so I can link my
>computer, terminal server, and power supply to the internet through my cable
>modem using NAT (actually it would be considered NAT overload or PAT, but
>Netgear and Linksys call it NAT). All of the Netgear/Linksys advertisements
>that I have seen are very vague about their NAT capabilities.
>
>My goal is to have the ability to telnet to any of my inside devices from an
>outside location. To do this, I would need to setup static PAT tables,
>right? Does anyone know if any of these small routers support this?
>
>Thanks in advance,
>Fred
Actually, I think according to the RFCs, it should be called NAPT. (refer
to RFC2663). I think Cisco is the only one who calls it NAT overload /
PAT. Others lump it into NAT. ;) Well, as long a we understand each
other it does not really matter on the semantics.
The small routers do allow for static maps. Although I have heard of
slight reliability issues with some applications (this is beyond the usual
problems with NAPT). They even allow for "DMZ" mode, which is really just
a static map for inbound connections. So that would definitely let you do
what you want. A lot of my friends who have it insist that it does allow
for static maps so you can redirect externalip:port into
internalip:port. That might give you a more fine tuned level of control.
I am sure a Unix Box using IPFilter or Natd (FreeBSD) would probably do
much better than these boxes, or a cisco box. However, the price of these
NAPT routers is quite amazing and definitely cheaper than the other
solutions I mentioned. (the unix box issue being more of a learning curve
rather than raw parts, and even with the big price drops, hard to build a
decent PC for $200 bucks, eh?).
-Carroll Kong
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