[LARTC] Help PLEASE...Multi-Routing for ADSL on Linux: Request for

[Sanjay Arora <sanjay.k.arora@gmail.com>]

Hi all

I am a small business user running my IT infrastructure on Whitebox
linux (RHEL3 clone), with ADSL connectivity with a static ip, using
the ipcop firewall gateway (www.ipcop.org). I run my own web/mail
server as my website usage is not much and I cannot afford to lease a
dedicated server on the net, and leasing a shared server...I lose
control.

My DSL is prone to frequent outages and therefore I need a backup
link. Also, my DSL provider charges very high for usage, therefore I
want a lower cost connection.

Now in my area I have only one option for each requirement. Another
DSL provider who charges as high as the first one, but can be an
alternate provider, though issues dynamic iIPs only...this would do
for back up connection.

There's another cable ISP (ethernet to home) that provides flat-rate
asscess but issues private IPs 172.16.x.x & 10.x.x.x and has a NAT
machine that does the address translation and has less that quarter
the speed of other two providers. He is not willing to give a live ip,
even on extra charge.

Now, I want to connect three DSL's to my Internet gateway (ipcop
machine...again as I already have three LAN cards..no more slots
left), using one ethernet card connected to a four port switch where I
can terminate both the DSLs & cable internet connection. And to give
two static IPs (one public, one private) and one dynamic IP to my
ethernet card on the WAN side, using something like nexthop given in
the LARTC howto

Is this type os scenario:

1. Possible?
2. Easily maintainable? Especially on top an existing firewall distro,
that can be tweaked...maybe ipcop or some other, so that I don't have
to individually keep up with all the security updates that are bound
to come. Suggestions on any firewall gateway distro that would be more
amenable to any such solution that is suggested. Or do I have to do it
fully?
3. Secure?

Please give some comments & pointers, with web URLs for further reading.

Also, I would like to bifurcate traffic, especially downloads using
ftp, rsync (and if possible http downloads too) to go through the
private ip flat rate link. Something that seperates traffic by ports.

Request routing Gurus help me please. Am on a shoestring budget and
can't afford commercial hardware solutions that offer this kind of
functionality, IAC..don't even know of one that is specifically for
low-cost DSL usage.

With best regards.
Sanjay.
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