[Fwd: [LARTC] 1 adsl + 1 sdsl + masq + simultaneous incomming routes]

Mike Fedyk
2001-03-03T03:38:44Z

phil@optimumdata.com wrote:
>
> On Fri, 2 Mar 2001, Mike Fedyk wrote:
>
> > I have two dsl links, each with one ip, and a single gateway is assigned the ip
> > for each.
> >
> > ______ ______
> > | ADSL | | SDSL |
> > |______| |______|
> > \ /
> > \/
> > ___||____
> > | gateway |
> > |_________|
> > ||
> > ||
> > ||
> > _||__
> > | web |
> > |_____|
> >
> > OK.
> >
> > The problem: I am able to have the web server use one or the other dsl, but not
> > both at the same time.
> >
> > If I have web set to sdsl, replies to queries that came from adsl go out on the
> > sdsl link. Also since masq is involved, it also responds with the sdsl ip.
> >
> > How can I have replies go back on the correct internet link? OH, btw, the web
> > server is NT, so I won't be able to modify any packets there...
>
> What I've done is to put two IPs on the server (your web server, in this
> case). You would then have the gateway send one IP out via ADSL, and the
> out via SDSL.
>
> There is no way I know of to make that work.
>
> --
> -----------------------------------------------------------------------
> Phil Brutsche phil@optimumdata.com

There has to be a better way. I'm forwarding this to LKML. Maybe they have a
better idea...

I know the kernel keeps a route cache, is there something like a reverse MASQ
feature somewhere. Storing which incoming route + port number and keeping a
dynamic list...

TIA,

Mike