ip_forward wont stay enabled after reboot

Question

Using Ubuntu Server 14.04.1 LTS

I've changed net.ipv4.ip_forward to 1 in /etc/sysctl.conf and when I run sudo sysctl -p it works no problem but after a reboot ip_forward is back to 0.

After a reboot I can run sudo sysctl -p again and it works

How can I make it persist?

score 2 · Answer 1 · answered Dec 07 '21 at 22:44

2

There appears to be some problem with AWS VPN Client where the client turns ip forwarding off:

https://forums.aws.amazon.com/thread.jspa?threadID=345484

For most people who land here this won't be the problem. But it might help a few people.

answered Dec 07 '21 at 22:44

demented hedgehog

541

score 2 · Answer 2 · answered Dec 19 '14 at 21:25

2

I confirm that net.ipv4.ip_forward=1 in /etc/sysctl.conf is correct way to keep forwarding across reboots. I suggest to look into /etc/sysctl.d/* files if there is an override to 0 somewhere.

answered Dec 19 '14 at 21:25

Vladimir Kovalchuk

376

score 0 · Answer 3 · edited Apr 13 '17 at 12:24

0

I suggest that you see this answer and review the steps you made to set port forwarding on Linux.

edited Apr 13 '17 at 12:24

Community

1

answered Dec 19 '14 at 21:34

Ashraf Abusada

534

ip_forward wont stay enabled after reboot

3 Answers3