(solved) How to start/stop a network interface (Stretch)

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(solved) How to start/stop a network interface (Stretch)

Postby PaulS » 2017-03-08 01:56

Hi,

I just switched from Kubuntu to Debian Stretch with KDE and have a problem stopping my openVPN connections.

They are started automatically at system boot, but sometimes I have to stop one of them manually.
In old Debian I used ifup and ifdown for that task
In Kubuntu I used ifconfig

In Debian Strech I'm clueless, even after some recherche.
I have ifup and ifdown installed but it doesn't find my adapters.

My adapters are:
enp3sC for the ethernet device
tun1 and tun3 for openVPN devices

ifdown tun1 (or any other network device) just results in
ifdown: unknown inerface tun1

How is it done nowadays?
Last edited by PaulS on 2017-03-08 23:18, edited 1 time in total.
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Re: How to start/stop a network interface (Stretch)

Postby Head_on_a_Stick » 2017-03-08 06:40

I can't check this atm but try:
Code: Select all
# systemctl stop networking.service

Use this to start it again:
Code: Select all
# systemctl start networking.service

ifupdown only works if the connections are controlled through /etc/network/interfaces

You can do this instead if you want by configuring that file as desired with reference to interfaces(5).

EDIT: you can set an individual interface down with:
Code: Select all
# ip link set tun1 down

Bring it up again with:
Code: Select all
# ip link set tun1 up
“Controlling complexity is the essence of computer programming."Brian Kernighan

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(solved) How to start/stop a network interface (Stretch)

Postby PaulS » 2017-03-08 23:16

Thanks a lot, Head_on_a_Stick,

systemctl stop networking.service didn't seem to do anything, but ip link set tun1 up / down did exactly what I wanted.

Can I mark this question as solved somehow? I did it by changing the subject, but maybe there's an "official" way?
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