Thanks for posting your logs. I looked into them and could not see anything wrong. I also tried to use your repository (as retrieved from our production logs) but I was unable to use it. It keeps bouncing me off with "operation not permitted" error. Here are all the logs I got from the attempt:
== Info: About to connect() to 184.xxx.xxx.xxx port zzzz (#0)
== Info: Trying 184.xxx.xxx.xxx... == Info: Operation not permitted
== Info: couldn't connect to host
== Info: Closing connection #0
I suggest you ensure your WebDAV server is working properly with requests coming from inside and outside your local network. I know you said you've tested that but I am not sure what else to suggest at this point. I was able to ping your IP, I was not able to telnet to the supposed telnet port. I was able to telnet to port 80 (default http port). Maybe a misconfiguration?