as you can see in the log its trying to access plex.tv but as there is only lan and no wan it crashes the plex server and this cant be started after for a while, so means this plex server cant run without internet access?
here a part of the log:
Jun 25, 2016 21:05:42.067 [0xeed11b40] WARN - MyPlex: Updating device connections failed, retrying in 1280 seconds.
Jun 25, 2016 21:07:40.613 [0xf27ffb40] ERROR - EventSource: Retrying in 600 seconds.
Jun 25, 2016 21:08:07.303 [0xeed11b40] ERROR - Error issuing curl_easy_perform(handle): 6
Jun 25, 2016 21:08:07.303 [0xeed11b40] WARN - HTTP error requesting GET http://ocspx.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSnVdbEyh8T3xvVlkPGHNCJxnqCPgQUlIuJ90hyifJRStmIe%2BVhtaqc1QECEA%2F9rFXzxiWcwlMlY%2BrOGuI%3D (6, Couldn’t resolve host name) (Couldn’t resolve host ‘ocspx.digicert.com’)
Jun 25, 2016 21:08:07.304 [0xeed11b40] ERROR - OCSP response error: -6
Jun 25, 2016 21:09:34.129 [0xee3ffb40] ERROR - Error issuing curl_easy_perform(handle): 6
Jun 25, 2016 21:09:34.129 [0xee3ffb40] WARN - HTTP error requesting GET https://plex.tv/servers/ed3f71307edc733c42f041328e606bd2231ff6d4/access_tokens.xml?includeProfiles=1&includeProviders=1&auth_token=xxxxxxxxxxxxxxxxxxxx (6, Couldn’t resolve host name) (Couldn’t resolve host ‘plex.tv’)
Jun 25, 2016 21:09:37.847 [0xf2511b40] ERROR - CERT: Error in TLS handshake: short read
Jun 25, 2016 21:09:37.934 [0xf2511b40] ERROR - CERT: Error in TLS handshake: short read
Jun 25, 2016 21:09:38.062 [0xf27ffb40] ERROR - CERT: Error in TLS handshake: short read
Jun 25, 2016 21:09:59.854 [0xef7ffb40] INFO - CodecManager: obtaining decoder ‘h264’ (profile ‘high’)
Jun 25, 2016 21:10:19.883 [0xef7ffb40] ERROR - Error issuing curl_easy_perform(handle): 6
Jun 25, 2016 21:10:19.883 [0xef7ffb40] WARN - HTTP error requesting GET https://plex.tv/api/codecs/h264_decoder?build=linux-synology-i686&deviceId=bf5cd022-27b8-4466-85e0-15463cc4e06f&oldestPreviousVersion=legacy&version=2c361e4-1071 (6, Couldn’t resolve host name) (Couldn’t resolve host ‘plex.tv’)
Jun 25, 2016 21:10:19.884 [0xef7ffb40] ERROR - HTTP -6 downloading url https://plex.tv/api/codecs/h264_decoder?build=linux-synology-i686&deviceId=bf5cd022-27b8-4466-85e0-15463cc4e06f&oldestPreviousVersion=legacy&version=2c361e4-1071
Jun 25, 2016 21:10:19.884 [0xef7ffb40] ERROR - Codecs: Failed to download XML for codec ‘h264’/‘high’; dec=1
Jun 25, 2016 21:10:19.884 [0xef7ffb40] ERROR - Error configuring transcoder: Codec install failed
