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FishBoneEK

Member

Registered: 2023-09-26

Posts: 60

[SOLVED] net/ipv4/ip_forward is overridden even if it's in config file

Hello!
I'd like to turn the net/ipv4/ip_forward on, and in my /etc/sysctl.d/50-forward.conf:

net.ipv4.ip_forward=1

Also "systemd-analyze cat-config sysctl.d | grep ip_forward" shows:

net.ipv4.ip_forward=1

However on every boot I can see the ip forward option is still turned off. It seems it's overridden by something.
If I remembered correctly, my config used to work until weeks ago.
Suggestion? Thanks!

EDIT:
Problem resolved, it's one of my proxy program which supports setting IP forward via its interface. Perhaps I set if off some time ago, so it sets ip_forward to 0 at boot time.

Last edited by FishBoneEK (2024-05-18 08:23:13)

schard

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From: Hannover

Registered: 2016-05-06

Posts: 2,653

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Re: [SOLVED] net/ipv4/ip_forward is overridden even if it's in config file

If it's not overridden by any config, some kind of program or script must be invoking sysctl and reset the value.

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FishBoneEK

Member

Registered: 2023-09-26

Posts: 60

Re: [SOLVED] net/ipv4/ip_forward is overridden even if it's in config file

If it's not overridden by any config, some kind of program or script must be invoking sysctl and reset the value.

Yeah I know, but I don't know what program or script it is

edacval

Member

From: .LT

Registered: 2008-10-23

Posts: 98

Re: [SOLVED] net/ipv4/ip_forward is overridden even if it's in config file

Are you using systemd-networkd for network configuration ?

FishBoneEK

Member

Registered: 2023-09-26

Posts: 60

Re: [SOLVED] net/ipv4/ip_forward is overridden even if it's in config file

Are you using systemd-networkd for network configuration ?

No, I use NetworkManager. Plus I have an AP connection set up, it connects automatically.

loqs

Member

Registered: 2014-03-06

Posts: 18,911

Re: [SOLVED] net/ipv4/ip_forward is overridden even if it's in config file

Is the value changed after manually running systemd-sysctl to apply that config?

# /usr/lib/systemd/systemd-sysctl 50-forward.conf

FishBoneEK

Member

Registered: 2023-09-26

Posts: 60

Re: [SOLVED] net/ipv4/ip_forward is overridden even if it's in config file

Is the value changed after manually running systemd-sysctl to apply that config?

# /usr/lib/systemd/systemd-sysctl 50-forward.conf

Thanks for the help. I just solved it. You can check the updated post for the result.