I've been conducting some tests with my OpenVPN which apparently resulted in the exhaustion of my ifconfig pool. Now when I try to connect to the server, it logs:

Thu Mar 30 13:46:11 2017 client/<ip>:<port> MULTI: no free --ifconfig-pool addresses are available
Thu Mar 30 13:46:11 2017 client/<ip>:<port> MULTI: no dynamic or static remote --ifconfig address is available for client/<ip>:<port>

How do I flush/release IPs from the pool?

On a Debian stretch with OpenVPN 2.4.0, OpenSSL 1.0.2k


A simple restart of OpenVPN should do this unless you have set something to make it track IPs over restarts.

/etc/init.d/openvpn restart

  • 1
    Although the option is valid, I doubt that OP would have wasted time asking about it if that was a suitable solution. – Julie Pelletier Jun 28 '17 at 12:48

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