mpegard
Hello,
Since few weeks, our users are disconnected randomly and concurrently.
During the disconnection, IP adress linked to tun0 is not pingable anymore, but the server IP adress and public IP adress is.
we don't have any errors in Openvpn logs which explain this problem.
The problem is not related to key renegotiation.
We have ruled out this cause from the beginning, the disconnections noticed are common to several users who did not connect at the same time.
What we have checked
- server ressources (ram,CPU,disk, network flow).
- firewall rules, IPS/IDS.
With maximum verbosity on OpenVPN logs the only thing we see is a flow interruption of a few seconds.
We have increased the receive/transmit buffer limits on the server's network card.
We have upgraded OpenVPN in last version.
our config :
UDP mode
route are sent to client
more than 100 users simultaneously
How can we proceed further to diagnose this ?
Do we missed something ?
Is there a user limit ?
Thx
