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Asked: 2020-04-29 10:36:58 +0800 CST

Ubuntu 20.04 Focal, Network Manager Hotspot, 'No Internet connection'

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After upgrade Ubuntu 18.04 to 20.04, I noticed Hotspot feature seemed working, and phones were able to connect by wifi, but then they reported No internet connection

After checking network-manager logs, it looks like when the Hotspot feature is enabled/disabled, it tries to configure iptables. If you check the logs:

sudo journalctl -fu NetworkManager

you can see here, it is trying to use iptables throught /sbin/iptables path, but it's not the real installation path of it:

NetworkManager[1328]: <warn>  [1588096735.3274] Error executing command: Failed to execute child process “/sbin/iptables” (No such file or directory)

As it is not able to configure the redirections, it won't bridge the connetions to/from the internet.

networking iptables network-manager ap-hotspot 20.04

1 Answers

  1. Best Answer

    Create a symbolic link in that path, pointing to the real binary will do the trick:

    ln -s /usr/sbin/iptables /sbin/iptables

    And then, it doesn't print those warnings, and Hotspot is working again.

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