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> -----Original Message-----
> From: Craig Baird [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, May 02, 2000 11:31 AM
> To: [EMAIL PROTECTED]
> Subject: [Masq] Applications & IPMasq
>
> I operate a small ISP, and am using IP Masq to masquerade a high-speed
> wireless network. Obviously, I have people who have problems using
> certain applications like Dialpad, Net2phone, certain games, etc. One
> of my competitors recently rolled out a DSL network that is
> NAT'ed using
> a Cisco router. Interestingly, some of the applications that do not
> seem to work from behind my Masq machine work fine behind their Cisco
> NAT router. Napster and Diablo are the two primary examples
> that I know
> of. I can get Napster to work so long as I tell it to use my SOCKS5
> proxy. But even then, it has problems when connecting to other
> firewalled users. However, with my competitor's Cisco system, no
> additional settings are required, and it never complains about
> anything. I'm not sure about others. Anyway, does anyone
> know why this
> would be? My impression was that essentially IPMasq and NAT
> implementations are functionally pretty much the same. Any
> idea why the
> difference?
NAT is a pretty general term. I know people who use a "static NAT" to map
1:1 from internal IPs to external IPs, and then others who use "dynamic NAT"
or IP-MASQ, or "illegal NAT" which is 1 "internet" IP to hide many
"internal" or "private" IPs. What breed of NAT are they doing on the Cisco
router? The implementation of NAT that Cisco uses is different from the one
in the Linux kernel, that in itself could be enough to make the difference.
Greg
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