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Yishu Fang
Asked: 2013-01-05 04:04:00 +0800 CST

How to remove the sit0 network interface?

  • 772

when I type ifconfig -a, there is a sit0, why it is here, and how to delete it?

sit0      Link encap:IPv6-in-IPv4  
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
networking

3 Answers

  1. sit stands for simple internet transition. sit0 is the Linux name for 6to4. 6to4 is a tunneling protocol for using IPv6 over an existing IPv4 connection.

    Source: http://www.tldp.org/HOWTO/Linux+IPv6-HOWTO/

    To disable sit0 interface

    open /etc/modprobe.d/aliases file using the command sudo gedit /etc/modprobe.d/aliases search for "alias net-pf-10 ipv6" and replace that with "alias net-pf-10 off"

    Reboot the machine.

    Source: https://help.ubuntu.com/community/WebBrowsingSlowIPv6IPv4

    Hope this helps.

    • 6

  2. The sit0 interface appears if the sit kernel module is loaded. To remove it without reboot, unload the sit module:

    sudo modprobe -r sit

    You may need to make sure all sit tunnels are down and removed before you unload the sit module using

    ip link set dev <SIT TUNNEL NAME> down
ip tunnel del <SIT TUNNEL NAME>

    If the module is loaded on startup it will re-appear after a reboot. To remove it permanently see Michael Hampton's answer.

    • 5

  3. Blacklist the sit module, so that it doesn't load.

    Edit /etc/modprobe.d/blacklist:

    sudo nano -w /etc/modprobe.d/blacklist

    Add an entry to blacklist sit:

    blacklist sit
    • 4