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gasebupor

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Registered: 2019-05-14

Posts: 8

[SOLVED] docker0 does not have internet access

What does not work — ping to any IP address using -I docker0 arguments to ping. However, I can access that IP from my default interface.

I have both iptables.service and nftables.service enabled and running. Tried to change kernel version from 5.1.3-arch2-1 to 4.19.44-1, docker version from 18.09.6 to 18.06.0 and systemd-networkd to dhcpcd, nothing did work.

systemd-networkd has IPForward=yes in my .network file and sysctl net.ipv4.ip_forward is 1.

How do I fix that?

Last edited by gasebupor (2019-05-22 16:51:20)

firecat53

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From: Lake Stevens, WA, USA

Registered: 2007-05-14

Posts: 1,542

Website

Re: [SOLVED] docker0 does not have internet access

What problem are you trying to solve...the command you listed doesn't work on my machine either and I use Docker every day. The important question is whether you can access the internet from a container. Does this work?

docker run -it --rm alpine ping -c3 google.com

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gasebupor

Member

Registered: 2019-05-14

Posts: 8

Re: [SOLVED] docker0 does not have internet access

Solved. Docker does not automagically fill nftables, it only works with iptables and iptables translator seems to be bad at its job.

gasebupor

Member

Registered: 2019-05-14

Posts: 8

Re: [SOLVED] docker0 does not have internet access

Also, I forgot to mention that I was wrong using docker0 interface. It should be used just as a master interface for container interfaces, which did not work either.