Date: Thu, 28 Sep 2000 09:32:23 +0300 From: "Ari Suutari" <ari@suutari.iki.fi> To: "Julian Elischer" <julian@elischer.org>, "Patrick Bihan-Faou" <patrick@mindstep.com> Cc: <freebsd-net@FreeBSD.ORG> Subject: Re: natd and userland ppp Message-ID: <004d01c02915$e0656f90$0e05a8c0@intranet.syncrontech.com> References: <Pine.BSF.4.10.10009270922150.15101-100000@InterJet.elischer.org>
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Hi,
> One good reason is that the PPP IP address is dynamically assigned and
> NATD doesn't work so well in such a dynamic environment.
> They are both running the same NAT library, but is you use NATD then the
> packet is diverted to userland TWICE, with it's
> attendant reduction in throughput and increase in latency..
>
> PPP diverts packet out of the kernel once. Once it's diverted you might as
> well do the NAT on the packet. (and as I said, you'd have a lot of fun
> getting NATD synchronised with ppp. (You'd have to use all sorts of
> link-up and link-down scripts.
I think that this is not true. Just use -dynamic flag in natd and
it will automatically track down address changes on ppp interface.
Ari S.
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