the log of openvpn server (openvpn-status.log) contains the following
TITLE,OpenVPN 2.4.0 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Oct 14 2018
TIME,Tue Feb 23 19:40:47 2021,1614109247
HEADER,CLIENT_LIST,Common Name,Real Address,Virtual...