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good day all

My openvpn server uses NTP / port 123 UDP, and while I am connected to the vpn and having an active data stream through it, I am not able to detect my IP on the server side

I only see my ssh session over 22, but that is about that 

netstat -tu

Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 {server_ip}:57991 {remote_ip}.ip.:http CLOSE_WAIT 
tcp        0      0 {server_ip}:ssh {partner_ip}:61761 ESTABLISHED
tcp        0     36 {server_ip}:ssh {my_ip}:60992 ESTABLISHED
tcp6       0      0 {ipv6_ip} 2601:{ipv6_ip}:53558 TIME_WAIT

no mention is made of a port 123, the only feedback I got from port 123 udp / ntp was

netstat -a

...
udp        0      0 *:ntp                   *:* 
...

and 

ss -a | grep 123

has no result, is this a security function of openvpn to hide all IP's associated? How am I able to view my IP as a openvpn client?

UPDATE

running 

netstat -antup | grep 123

responds with 

udp        0      0 0.0.0.0:123             0.0.0.0:*                           410/openvpn

I have come across posts mentioning using openvpn-status.log, I am currently coding a small script to show only associated IP's, this status log updates in 1 minute intervals, its the closest I have come to viewing "active" connections!

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2 Answers 2

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UPD is a connectionless protocol therefore it does not show as connected

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  • Try netstat -antup
    – dotvotdot
    Nov 21, 2015 at 2:37
  • check update of new info
    – CybeX
    Nov 21, 2015 at 8:34
  • as you can see udp:123 is being used by openvpn, that is the sum extent to which you can use netstat to show your connection because UDP is a connectionless protocol.
    – dotvotdot
    Nov 21, 2015 at 14:01
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TO find your VPN client IP you can use the OpenVPN log file (server or client). Also, as you are logged in to ssh on the server netstat -antup (without grep) will show your client IP connected to ssh port.

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