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

[PaulS]

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?

[Head_on_a_Stick]

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

[PaulS]

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?