Disable IPv6 on Debian

This article provides a guide demonstrating how to disable IPv6 on Debian servers.

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How to Disable IPv6 on Debian

To disable IPv6 on Debian server, follow the steps below:

  1. Edit the configuration file: 
    sudo nano /etc/sysctl.d/99-disable-ipv6.conf
  2. Add the following lines: 
    net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
  3. Apply the changes: 
    sudo sysctl -p /etc/sysctl.d/99-disable-ipv6.conf
  4. Verify: 
    cat /proc/sys/net/ipv6/conf/all/disable_ipv6
    should return: 
    1

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Conclusion

You now know how to disable IPv6 on Debian servers.

  • debian, ipv6
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