Policy based routing on RHEL

If you configure multiple network cards in your RHEL machine with more than one gateway then you can use “policy based routing” to configure the network traffic in a way where the traffic will leave the same interface where the traffic came from.

This procedure is described in this Red Hat KCS article.

I also created a Puppet module to configure policy based routing on RHEL 6 / 7. Currently this module does not handle Bond or VLAN tagged interfaces. You can find my module here.

Test and fix your Puppet code with Puppet Lint

Puppet Lint is a nice tool to check the syntax of your Puppet code. Common errors can be fixed directly with Puppet Lint. It can also be included to CI tools like Jenkins if you want to check your Puppet code during a Jenkins build job for example.

Find out more about Puppet Lint here.