Some random questions (I am well and truly running out of ideas):
- Does telnet 192.168.88.251 to the calibre content content server port work? If not then the telnet test isn't giving useful information.
- What does ipconfig -a give for the 192.168.88.251 interface?
- What does netstat -nltp give? In particular I am looking for any different between the content server and the WD listen sockets.
- With the same netstat as above, is calibre the program doing the listens?
- What does /usr/sbin/getenforce return? I am wondering about whether selinux could be part of the problem. This is very much a shot in the dark.