How to set up an OpenVPN server to work from a specific IP address?

Question

openvpn

There is an OpenVPN server on CentOS, everything is set up and the clients are working, how to make this server, even if the client has a connection config to it, work with only one open IP address, well, roughly speaking, only from the office IP.

Answer 1

in general, everything is easily solved with the help of firewall'a: you add a port and an address to the zone.
example for firewalld:

firewall-cmd --new-zone=openvpn_access --permanent
firewall-cmd --reload
firewall-cmd --zone=openvpn_access --add-source=нужный адрес с которго необходимо юзать openVPN/32 --permanent
firewall-cmd --zone=openvpn_access --add-port=1194/udp(tcp)  --permanent
firewall-cmd --reload