shutdown/startup nic commands

jukebox55 · 01-31-2008, 12:47 PM

i want to be able to shutdown my nic so that all internet traffic stops (in and out) when im not using the internet.
i searched the LQ forums and found a possible command

Code:

ifup eth0
ifdown eth0

but when i try them, i get :command not found.

is there some reason why this wont work?

jailbait · 01-31-2008, 12:53 PM

Quote:

Originally Posted by jukebox55

i want to be able to shutdown my nic so that all internet traffic stops (in and out) when im not using the internet.
i searched the LQ forums and found a possible command

Code:

ifup eth0
ifdown eth0

but when i try them, i get :command not found.

is there some reason why this wont work?

Most distributions don't put the ifup and ifdown commands on the PATH. You usually have to specify the entire path to the command. ifup and ifdown are usually somewhere in /etc so you can use these commands to find them:

find /etc -iname '*ifup*"

find /etc -iname '*ifdown*"

---------------------
Steve Stites

farslayer · 01-31-2008, 01:20 PM

Faster than doing a find would be the which command

which ifup and which ifdown

the issue is that since you are trying to do this as a normal user the command is not in your path. both of those commands reside in the /sbin directory

/sbin/ifup eth0
/sbin/ifdown eth0

but then you run into permissions issues since a normal user will not have rights to shut down the device by default.

you will either need to su - to root to issue the commands, or configure sudo so you can use 'sudo /sbin/ifup eth0'

jukebox55 · 01-31-2008, 01:32 PM

ifup/ifdown must not be included with slackware 11 because ive used the 'find' and 'which' methods, and i cant find them.

i had a look in /sbin and theyre not in there.

Poetics · 01-31-2008, 02:04 PM

Slackware just uses the standard "ifconfig [interface] up|down"

for example, my wireless card gets enabled with "ifconfig wlan0 up" and disabled with "ifconfig wlan0 down"

jukebox55 · 01-31-2008, 04:08 PM

Quote:

Originally Posted by Poetics

Slackware just uses the standard "ifconfig [interface] up|down"

oh i see. unfotunately, although 'ifconfig eth0 down' will shut the nic down, 'ifconfig eth0 up' will not bring it back up, i have to reboot for that.

geesh · 11-14-2008, 10:57 AM

If you use a firewall front end like firestarter you can simply lock all traffic out both in and outbound by locking the firestarter. Very very quick and easy. No restarting except to unlock firestarter.