My docker container has no internet

+1 vote
My docker has no internet. The last time I used it was working fine. I’ve tried these following commands but not helping.

docker run -dns base ping

docker run base ping

sysctl -w net.ipv4.ip_forward=1 - both on the host and on the container

All I get is unknown host Docker version 0.7.0

Any help will be appreciated..
Jul 31, 2018 in Docker by Hannah
• 18,570 points

5 answers to this question.

+1 vote
Best answer

Try resetting all the parameters

pkill docker
iptables -t nat -F
ifconfig docker0 down
brctl delbr docker0
docker -d

It will force docker to recreate the bridge and reinit all the network rules

answered Jul 31, 2018 by Kalgi
• 52,360 points

selected May 7, 2019 by Vardhan
0 votes

The most common reason for this error is if the container holds an invalid DNS. Then the container will not be able to resolve the domain name into IP addresses. And hence the ping will also fail. Run the following command to check for DNS server:

cat /etc/resolv.conf
answered May 6, 2019 by Faziba
0 votes

Restarting Docker worked for me. Restart it using the following command:

service docker restart
answered May 6, 2019 by Aysha
0 votes

If you're running Docker on OSX, do the following:

docker-machine restart
<...wait for it to restart, which takes up to a minute...>
docker-machine env
eval $(docker-machine env)
answered May 6, 2019 by Nishant
0 votes

For me, it was the host's firewall. I had to allow DNS on the host's firewall. And also had to restart docker after changing the host firewall setting.

answered May 6, 2019 by Tina

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