how to route all traffic of a program through a particular networkinterface

I have two network interface connecting to different ISPs. The
first interface have large bandwidth and also high ping value, the
other have small bandwidth and very low ping value.

Whenever I use a download manager to download, I found that webpage
browsing slows down tremoudously.

So, is it possible that all the traffic of the download manager shall
routes over my 1st interface, and browser traffic routes over my 2nd
interface?

Thank you.

In article <aaed7432-a57d-429e-ae6c-c7c86e195288@a32g2000prf.googlegroups.com>,
fanti <fantimond@gmail.com> wrote:[color=blue]
> I have two network interface connecting to different ISPs. The
>first interface have large bandwidth and also high ping value, the
>other have small bandwidth and very low ping value.[/color]
[color=blue]
> Whenever I use a download manager to download, I found that webpage
>browsing slows down tremoudously.[/color]
[color=blue]
>So, is it possible that all the traffic of the download manager shall
>routes over my 1st interface, and browser traffic routes over my 2nd
>interface?[/color]

Maybe, depending on the equipment and software involved.

It isn't clear from your posting whether you have host with
two NICs that connect directly (or through a modem) to different ISPs;
or if you have a single host inside a router that has connections
to two ISPs; or if you have multiple hosts inside a router that
has connections to two ISPs... and if the latter, it isn't clear
whether you want the different routing to happen for one host or for
all hosts.

All of the situations I mentioned or directly implied in the above
have solutions (equipment and software willing), but the configuration
details could differ a fair bit depending which of these situations
is involved.

On May 25, 10:24 am, rober...@hushmail.com (Walter Roberson) wrote:[color=blue]
> In article <aaed7432-a57d-429e-ae6c-c7c86e195...@a32g2000prf.googlegroups.com>,
>
> fanti <fantim...@gmail.com> wrote:[color=green]
> > I have two network interface connecting to different ISPs. The
> >first interface have large bandwidth and also high ping value, the
> >other have small bandwidth and very low ping value.
> > Whenever I use a download manager to download, I found that webpage
> >browsing slows down tremoudously.
> >So, is it possible that all the traffic of the download manager shall
> >routes over my 1st interface, and browser traffic routes over my 2nd
> >interface?[/color]
>
> Maybe, depending on the equipment and software involved.
>
> It isn't clear from your posting whether you have host with
> two NICs that connect directly (or through a modem) to different ISPs;
> or if you have a single host inside a router that has connections
> to two ISPs; or if you have multiple hosts inside a router that
> has connections to two ISPs... and if the latter, it isn't clear
> whether you want the different routing to happen for one host or for
> all hosts.
>
> All of the situations I mentioned or directly implied in the above
> have solutions (equipment and software willing), but the configuration
> details could differ a fair bit depending which of these situations
> is involved.[/color]

I have one host with two NIC.

In article <cda2ac1a-4e7e-4223-850c-2f7b4bf7d022@l17g2000pri.googlegroups.com>,
fanti <fantimond@gmail.com> wrote:
[color=blue]
>I have one host with two NIC.[/color]

Based upon your *lack* of answer on the matter of software, there
would be some who would deduce that you are very likely running
one of the MS Windows series. If that is the case and if you could
mention -which- MS operating system, then there is a possibility
that someone passing by might happen to know how to configure for
what you want to do.

On Sat, 24 May 2008 19:28:24 -0700, fanti wrote:
[color=blue]
> On May 25, 10:24 am, rober...@hushmail.com (Walter Roberson) wrote:[color=green]
>> In article
>> <aaed7432-a57d-429e-ae6c-c7c86e195...@a32g2000prf.googlegroups.com>,
>>
>> fanti <fantim...@gmail.com> wrote:[color=darkred]
>> > I have two network interface connecting to different ISPs. The
>> >first interface have large bandwidth and also high ping value, the
>> >other have small bandwidth and very low ping value.
>> > Whenever I use a download manager to download, I found that webpage
>> >browsing slows down tremoudously.
>> >So, is it possible that all the traffic of the download manager shall
>> >routes over my 1st interface, and browser traffic routes over my 2nd
>> >interface?[/color]
>>
>> Maybe, depending on the equipment and software involved.
>>[/color][/color]

(snip)
[color=blue]
> I have one host with two NIC.[/color]

I assume a Windows host.

Put an old PC with linux between your home network and your two Internet
connections.
+-------+
--- Internet1 ---+ Linux +--- Internet2 ---
+---+---+
|
+---+---+
| WinPC |
+-------+

Do some magic with Wondershaper to shape the interfaces, which will
prevent the slowdown on loaded links. Use some magic with iproute2 to
make some connections go over one Internet connection and some
connections over the other. It's not rocketscience, but not very easy
either if you have no Linux experience and/or some basic understanding of
tcp/ip.

Other OSses can probably do something similar, but Windows cannot. Don't
try, it won't work (satisfactory).

HTH,
M4