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I have just completed setting up an OpenVPN Server, ver 2.0 under CentOS 5. In the past I have never experienced an issue connecting Windows / Linux / Mac clients to my Servers. This one has me puzzled. After completing the installation, setting the firewall rules, forwarding port 1194 on my router, etc.. I was able to connect successfully. The following morning, when attempting to connect I received the following error messages in my client log.
Tue Mar 20 18:00:52 2012 OpenVPN 2.0.9 Win32-MinGW [SSL] [LZO] built on Oct 1 2006
Tue Mar 20 18:00:52 2012 IMPORTANT: OpenVPN's default port number is now 1194, based on an official port number assignment by IANA. OpenVPN 2.0-beta16 and earlier used 5000 as the default port.
Tue Mar 20 18:00:56 2012 LZO compression initialized
Tue Mar 20 18:00:56 2012 Control Channel MTU parms [ L:1574 D:138 EF:38 EB:0 ET:0 EL:0 ]
Tue Mar 20 18:00:56 2012 Data Channel MTU parms [ L:1574 D:1450 EF:42 EB:135 ET:32 EL:0 AF:3/1 ]
Tue Mar 20 18:00:56 2012 Local Options hash (VER=V4): 'd79ca330'
Tue Mar 20 18:00:56 2012 Expected Remote Options hash (VER=V4): 'f7df56b8'
Tue Mar 20 18:00:56 2012 UDPv4 link local: [undef]
Tue Mar 20 18:00:56 2012 UDPv4 link remote: 100.127.40.254:1194
Tue Mar 20 18:01:56 2012 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Tue Mar 20 18:01:56 2012 TLS Error: TLS handshake failed
Tue Mar 20 18:01:56 2012 TCP/UDP: Closing socket
Tue Mar 20 18:01:56 2012 SIGUSR1[soft,tls-error] received, process restarting
Tue Mar 20 18:01:56 2012 Restart pause, 2 second(s)
Tue Mar 20 18:01:58 2012 IMPORTANT: OpenVPN's default port number is now 1194, based on an official port number assignment by IANA. OpenVPN 2.0-beta16 and earlier used 5000 as the default port.
Tue Mar 20 18:01:58 2012 Re-using SSL/TLS context
Tue Mar 20 18:01:58 2012 LZO compression initialized
Tue Mar 20 18:01:58 2012 Control Channel MTU parms [ L:1574 D:138 EF:38 EB:0 ET:0 EL:0 ]
Tue Mar 20 18:01:58 2012 Data Channel MTU parms [ L:1574 D:1450 EF:42 EB:135 ET:32 EL:0 AF:3/1 ]
Tue Mar 20 18:01:58 2012 Local Options hash (VER=V4): 'd79ca330'
Tue Mar 20 18:01:58 2012 Expected Remote Options hash (VER=V4): 'f7df56b8'
Tue Mar 20 18:01:58 2012 UDPv4 link local: [undef]
Tue Mar 20 18:01:58 2012 UDPv4 link remote: 100.127.40.254:1194
Tue Mar 20 18:02:01 2012 TCP/UDP: Closing socket
Tue Mar 20 18:02:01 2012 SIGTERM[hard,] received, process exiting
I have double checked my router, port 1194 is being forwarded. Performed a TCPDUMP on the CentOS Server, see the traffic arriving on the interface. Checked my firewall rules, even tried turning off the firewall. Does anyone have any additional ideas on what I should check / try to get this issue resolved?
