List which VPN clients are connected

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Chapters
00:00 List Which Vpn Clients Are Connected
00:40 Accepted Answer Score 11
01:06 Answer 2 Score 2
01:28 Answer 3 Score 0
01:58 Answer 4 Score 0
02:14 Thank you

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Full question
https://superuser.com/questions/819729/l...

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Content licensed under CC BY-SA
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Tags
#openvpn

#avk47

ACCEPTED ANSWER

Score 11

You can do this with a small expect-script:

#!/usr/bin/expect
spawn telnet localhost 7505
set timeout 10
expect "OpenVPN Management Interface"
send "status 3\r"
expect "END"
send "exit\r"

And run it with (e.g.)

while true; do ./openVPNUserlist.sh |grep -e ^CLIENT_LIST; sleep 1; done

Also, in your server.conf - file, add the line

management localhost 7505

Packages you need to have installed:

telnet expect

~~Interestingly, the status does only update after a while (when a client disconnects, it keeps being displayed in the status for quite a while... Did not find a way to get around this yet :(~~
Change the timeout in your server.conf to the values you need:

keepalive 10 60

= ping client every 10 seconds and consider it disconnected after 1 minute.

ANSWER 2

Score 2

I located extensive vpn logs in this folder:

ls /var/log/openvpn/

For me, there were two files there, named kind of like this:

Arbitary-Name-VPN.log
status-Arbitary-Name-VPN.log

The first file showed a log of all vpn connections that have happened over time, and the second one (status-...) showed who is connected right now.

ANSWER 3

Score 0

The easy way is:

Add
```
status /var/log/openvpn-status.log
```
in your /etc/openvpn/server.conf and restart vpn server.

Use the below command to view connected clients from the log.

while true;
do
  cat /var/log/openvpn-status.log | sed -n '/OpenVPN CLIENT LIST/,/ROUTING TABLE/p' | tail -n+4 | sed "s/ROUTING TABLE//g";
  sleep 4s;
done

This will update the client list every 3 seconds.

ANSWER 4

Score 0

If you want it done in a single bash script, I took @GoodbyeKitty answer and made a single script..

#!/bin/bash
function management_server() {
    /usr/bin/expect <(cat << EOF
spawn telnet localhost 7505
set timeout 10
expect "OpenVPN Management Interface"
send "status 3\r"
expect "END"
send "exit\r"
EOF
)
}
while true
    echo "Checking IPs"
    do management_server | grep -e ^CLIENT_LIST
    sleep 30
done