Using two interfaces simultaneously?

[Ankur Sinha]

hi,

Is it possible for me to use two separate internet connections, one via
eth0 and the other via wlan0 at the same time?

I have been allotted a wireless connection from University, however this
one presents some trouble in certain tasks (It's also deactivated from
0000 to 0600). Because I intend to set up a server where some of my
friends would hold accounts (for fedora-tour development etc.), I got
myself an Airtel internet connection (it needs to be on 24x7). It would
be great if I could use them both simultaneously and specify what
program should use what interface.

[Ritesh Sinha]

On Sat, Aug 21, 2010 at 2:01 PM, Ankur Sinha  wrote:
> hi,
>
> Is it possible for me to use two separate internet connections, one via
> eth0 and the other via wlan0 at the same time?
>
> I have been allotted a wireless connection from University, however this
> one presents some trouble in certain tasks (It's also deactivated from
> 0000 to 0600). Because I intend to set up a server where some of my
> friends would hold accounts (for fedora-tour development etc.), I got
> myself an Airtel internet connection (it needs to be on 24x7). It would
> be great if I could use them both simultaneously and specify what
> program should use what interface.

An idea would be to use ifenslave to bond both the interfaces
together. i.e if one went down, the other would be up and running.
You'd have a common interface name e.g. bond1 with a static IP address
which would transparently hook together both interfaces. Alternatively
you can try and set up a shell script that reconfigures network
interfaces between certain times of the day or other conditions (this
would mean not allowing NetworkManager to use the interface).

To allow people to ssh in via your airtel connection, all you need to
do is set up portforwarding on the router provided.
> --
> Thanks!
> Regards,
> Ankur
>
> https://fedoraproject.org/wiki/User:Ankursinha
>
> "FranciscoD"
>
> india mailing list
> [e-mail]
> https://admin.fedoraproject.org/mailman/listinfo/india

[Ashwin]

On Saturday 21 August 2010 02:01 PM, Ankur Sinha wrote:
> hi,
>
> Is it possible for me to use two separate internet connections, one via
> eth0 and the other via wlan0 at the same time?

Yes. Essentially *two* gateways, "iproute2" provides the support.
> I have been allotted a wireless connection from University, however this
> one presents some trouble in certain tasks (It's also deactivated from
> 0000 to 0600). Because I intend to set up a server where some of my
> friends would hold accounts (for fedora-tour development etc.), I got
> myself an Airtel internet connection (it needs to be on 24x7). It would
> be great if I could use them both simultaneously and specify what
> program should use what interface.

In httpd.conf you can specify the interface the httpd server has to 
service and listen to, similarly most (if not all) servers like samba, 
dns etc. can be configured to bind itself to and listen on and service 
client requests landing on a specific IP address / interface.

A simple howto exists. I have used my GPRS and ADSL in similar 
configuration in past.

Do get back in case of further queries.

with Regards,
ASHWIN