Solved How do you disconnect an OpenVPN tunnel on CentOS 7?
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@sn said in How do you disconnect an OpenVPN tunnel on CentOS 7?:
I established a tunnel using the command "openvpn --config xyz.ovpn" but I couldn't figure out a way to disconnect the tunnel without rebooting the server. What command would you use to disconnect it on CentOS 7?
kill -9 $( ps -e | grep openvpn | grep -v grep | awk '{ print $1 }' ) -
@sn What is the virtual adapter called that openvpn is using for it's connection?
ifdown virbr0 -
@thwr That was the perfect answer I was looking for! Thank you.
One more question,
I tried to create an alias for that command but it gave me a "-bash: alias: print: not found" error.
I tried to replace awk '{ print $1 }' with cut -d' ' -f1 but still got similar error.
Adding the command to a bash script also did not work.Am I doing anything wrong here or is there a better way to shorten the command?
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@sn said in How do you disconnect an OpenVPN tunnel on CentOS 7?:
@thwr That was the perfect answer I was looking for! Thank you.
One more question,
I tried to create an alias for that command but it gave me a "-bash: alias: print: not found" error.
I tried to replace awk '{ print $1 }' with cut -d' ' -f1 but still got similar error.
Adding the command to a bash script also did not work.Am I doing anything wrong here or is there a better way to shorten the command?
What was the alias command that you attempted?
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@sn said in How do you disconnect an OpenVPN tunnel on CentOS 7?:
@thwr That was the perfect answer I was looking for! Thank you.
One more question,
I tried to create an alias for that command but it gave me a "-bash: alias: print: not found" error.
I tried to replace awk '{ print $1 }' with cut -d' ' -f1 but still got similar error.
Adding the command to a bash script also did not work.Am I doing anything wrong here or is there a better way to shorten the command?
Sure, np. Stopping an OpenVPN tunnel is basically just stopping the process. Signal 9 may be a bit hard, try lower levels to let it gracefully stop.
About the alias: see @StrongBad's answer
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@StrongBad I attempted to add the following line to the .bashrc
alias openvpn-disconnect='kill -9 $( ps -e | grep openvpn | grep -v grep | awk '{ print $1 }' )'
When sourced the .bashrc file, I received the following errors.
-bash: alias: print: not found
-bash: alias: }
not found -
@sn said in How do you disconnect an OpenVPN tunnel on CentOS 7?:
@StrongBad I attempted to add the following line to the .bashrc
alias openvpn-disconnect='kill -9 $( ps -e | grep openvpn | grep -v grep | awk '{ print $1 }' )'
When sourced the .bashrc file, I received the following errors.
-bash: alias: print: not found
-bash: alias: } not foundThat's because you messed up your quotes. Look at them, you have this:
kill -9 $( ps -e | grep openvpn | grep -v grep | awkThen you have this:
{ print $1 }Fix your quotes and it will likely work fine. If it doesn't run in a normal command line, it won't work in an alias command.
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@StrongBad said in How do you disconnect an OpenVPN tunnel on CentOS 7?:
@sn said in How do you disconnect an OpenVPN tunnel on CentOS 7?:
@StrongBad I attempted to add the following line to the .bashrc
alias openvpn-disconnect='kill -9 $( ps -e | grep openvpn | grep -v grep | awk '{ print $1 }' )'
When sourced the .bashrc file, I received the following errors.
-bash: alias: print: not found
-bash: alias: } not foundThat's because you messed up your quotes. Look at them, you have this:
kill -9 $( ps -e | grep openvpn | grep -v grep | awkThen you have this:
{ print $1 }Fix your quotes and it will likely work fine. If it doesn't run in a normal command line, it won't work in an alias command.
It does run in a normal command line without changing the quotes!
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@sn are you sure? The quotes are definitely wrong. How do you run it normally? You put quotes around the whole thing?
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So you are running it like this...
openvpn-disconnect='kill -9 $( ps -e | grep openvpn | grep -v grep | awk '{ print $1 }' )'ANd the value of the variable is what you want?
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@StrongBad Thank you!, I fixed the quote and my alias is now working!!
Now let me explain.
As you suggested, it was absolutely related to the messy quotes I was using. I changed the outer one to double quotes as below and the alias worked immediately.
alias openvpn-disconnect="kill -9 $( ps -e | grep openvpn | grep -v grep | awk '{ print $1 }' )"
When I said it was working in a normal command line, I was just entering the command without the outer quotes which means there was only one set of quote ( around { print $1} ) and hence it worked without any issues.
@thwr Thank you again for "killer" command!
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@sn NP.
