I have the following server.conf:
# OpenVPN 2.x config proto tcp port 1194 dev tun-vpn dev-type tun server 10.8.0.0 255.255.0.0 push "route 172.16.0.0 255.255.0.0" push "dhcp-option DOMAIN mydom.com" push "dhcp-option DNS 172.16.1.1" # Certificates ca /etc/openvpn/easy-rsa/keys/ca.crt cert /etc/openvpn/easy-rsa/keys/server.crt key /etc/openvpn/easy-rsa/keys/server.key tls-server # Diffie hellman parameters dh /etc/openvpn/easy-rsa/keys/dh1024.pem # Connection settings comp-lzo ping 10 ping-restart 120 # Server security persist-key persist-tun user nobody group nogroup # Logging status openvpn-status.log verb 4 mute 10
And the following client config:
# OpenVPN 2.x client config client dev tun proto tcp remote vpn.mydom.com 1194 resolv-retry infinite nobind persist-key persist-tun mute-replay-warnings ca ca.crt cert michaelc.crt key michaelc.key #ns-cert-type server comp-lzo ping 10 ping-restart 60 verb 3
These configurations work fine, but if I want to use UDP instead of TCP, I get the following log:
Thu May 24 22:30:16 2012 UDPv4 link local: [undef] Thu May 24 22:30:16 2012 UDPv4 link remote: [AF_INET]x.x.x.x:1194 Thu May 24 22:30:16 2012 TLS: Initial packet from [AF_INET]x.x.x.x:1194, sid=e63bd705 392de807 Thu May 24 22:30:16 2012 VERIFY ERROR: depth=1, error=self signed certificate in certificate chain: /C=NL/ST=Zuid_Holland/L=_s-Gravendeel/O=Visser__s-Gravendeel_Holding_B.V./CN=Visser__s-Gravendeel_Holding_B.V._CA/emailAddressfirstname.lastname@example.org Thu May 24 22:30:16 2012 TLS_ERROR: BIO read tls_read_plaintext error: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed Thu May 24 22:30:16 2012 TLS Error: TLS object -> incoming plaintext read error Thu May 24 22:30:16 2012 TLS Error: TLS handshake failed Thu May 24 22:30:16 2012 TCP/UDP: Closing socket Thu May 24 22:30:16 2012 SIGUSR1[soft,tls-error] received, process restarting Thu May 24 22:30:16 2012 Restart pause, 2 second(s)
I have verified the certificates against the ca.crt, and both server.crt and michaelc.crt are valid certificates signed with ca.crt.
Also, because they work over TCP, my assumption would be that the certificates are perfectly valid. I can imagine the connection being bad (although it's DSL on one end and business fiber on the other end), but is this fixable? I also tried generating new certificates (both CA, server and client), but that gives the exact same error. I hope someone can give me any hints.