CentOS / RHEL: Remove Routes / From the System

Posted on in Categories , last updated November 4, 2011

How do I disable the route / from CentOS or RHEL 6 Linux server?

zeroconf (Zero configuration networking), is a techniques that automatically creates a usable Internet Protocol (IP) network without manual operator intervention or special configuration servers. route is part of zeroconf under RHEL 6 / CentOS 6 or older versions. To see current routing table, enter:
# route -n
Sample outputs:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
74.8x.4y.zz U     0      0        0 eth1 U     0      0        0 eth0     U     1002   0        0 eth0     U     1003   0        0 eth1       UG    0      0        0 eth0         74.8x.yy.zz         UG    0      0        0 eth1

Every time the server or Linux desktop boots, the zeroconf route is enabled and added to the kernel routing table. To disable zeroconf route under RHEL / CentOS / Fedora Linux, enter:
# vi /etc/sysconfig/network
Append the following directive:


Save and close the file. Reboot the system / server or restart the networking service:
# /etc/init.d/network restart
Verify routing table, enter:
# route -n
# ip route

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on Twitter, Facebook, Google+.

9 comment

          1. … until something breaks and you are lost in a sea of “defaults” and “unknown configurations” !
            The best recipe for serious troubles.
            The reason we keep our place tidy, is to be able to get what we want when we want it. I have the feeling that you have not lived any troubleshooting nightmares, swearing at the people that prepared that stuff.
            I suppose, you never got a NFS mount not working just because of such a default route driving somewhere else.

    1. That is outside of the scope of this article.
      However, googling will show you that you edit /etc/sysconfig/network and add the keyword “gateway” like so:

      Replace with the default gateway you desire. After, just restart networking. (/etc/init.d/networking restart)

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