OpenVPN Support Forum

what the function of file:

ca.key
ca.crt

client.key
client.csr
client.crt

server.crt
server.csr
server.crt

I do not know its function, please information
thanks

this is not really the forum to ask: read up on Public Key Infrastructure (PKIs) to find out what certificates (and .csr, .crt and .key) files are used for.
http://openvpn.net/index.php/open-sourc ... o.html#pki