[CentOS] Configuring source-specific routing

Sat May 4 01:54:06 UTC 2013
Michael Mol <mikemol at gmail.com>

On 05/03/2013 06:05 PM, Rob Townley wrote:
> Michael, very frustrating that so much noise for a very simple request.  I
> set up multi source routing in 5.3 or so and was astounded at all the
> negativity on this list and that it could not be done.  It will take
> forever to read the noise in this thread alone.  Some said you have to use
> DHCP.... i could go on.
> Do not trust that ping -I will work how you would think.  Must specify an
> IP address, not eth0, not eth1.
> ping -I

Yup. Sans the obfuscated IP address, that's exactly what I tested.

> This really is just a few lines per interface.
> Learn by changing the /etc/sysconfig/network-scripts/ifup-route  shell
> scripts to add logging.
> echo out variables.

I tried adding "set -x" to them. :)

> There is no need to get iptables involved at all unless doing something
> very special.
> i did not want to setup quagga or some form of dynamic routing deamon
> because of security concerns.  i wanted static IP addresses communicating
> to the ISP on static routes.  It is pretty simple.  Maybe i can hook up my
> laptop to 3G and WiFi and Cat6 and make sure i get it working.  Please
> remember to use IP addresses, not names for ping testing.  Scrutinize ping
> results.
> ping -I

Yeah, I don't see a use for quagga at this time.


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