I recently installed openVPN and tried to connect through udp 53. I got the following log and reconnect loop is being triggered.
Mon Sep 14 00:01:55 2015 MANAGEMENT: >STATE:1442169115,RECONNECTING,tls-error,,
Mon Sep 14 00:01:55 2015 Restart pause, 2 second(s)
Mon Sep 14 00:01:57 2015 WARNING: No server certificate verification method has been enabled. See
http://openvpn.net/howto.html#mitm for more info.
Mon Sep 14 00:01:57 2015 NOTE: --fast-io is disabled since we are running on Windows
Mon Sep 14 00:01:57 2015 Socket Buffers: R=[65536->65536] S=[65536->65536]
Mon Sep 14 00:01:57 2015 MANAGEMENT: >STATE:1442169117,RESOLVE,,,
Mon Sep 14 00:01:57 2015 RESOLVE: Cannot resolve host address: euro217.vpnbook.com: No such host is known.
Mon Sep 14 00:01:57 2015 MANAGEMENT: >STATE:1442169117,RESOLVE,,,
Mon Sep 14 00:01:57 2015 RESOLVE: Cannot resolve host address: euro217.vpnbook.com: No such host is known.
Mon Sep 14 00:01:57 2015 SIGUSR1[soft,init_instance] received, process restarting
Mon Sep 14 00:01:57 2015 MANAGEMENT: >STATE:1442169117,RECONNECTING,init_instance,,
Mon Sep 14 00:01:57 2015 Restart pause, 2 second(s)
Mon Sep 14 00:01:59 2015 WARNING: No server certificate verification method has been enabled. See
http://openvpn.net/howto.html#mitm for more info.
Mon Sep 14 00:01:59 2015 NOTE: --fast-io is disabled since we are running on Windows
Mon Sep 14 00:01:59 2015 Socket Buffers: R=[65536->65536] S=[65536->65536]
Mon Sep 14 00:01:59 2015 UDPv4 link local: [undef]
Mon Sep 14 00:01:59 2015 UDPv4 link remote: [AF_INET]176.126.237.217:53
Mon Sep 14 00:01:59 2015 MANAGEMENT: >STATE:1442169119,WAIT,,,