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chaley · 02-13-2016, 07:54 AM

There are several things you can check.

If you are using automatic connections: does the firewall on your Linux computer permit incoming connections to calibre on all ports? Alternatively you must open the port for you specified in the calibre wireless device driver setup for TCP and ports 54982, 48123, 39001, 44044, 59678 for UDP.
If you are entering an IP+port into CC, does your firewall allow incoming connections on the port calibre wireless device setup?
Do you have a firewall installed on the tablet, and if so have you allowed CC to make outgoing connections on both TCP and UDP?
In calibre, if you run Preferences / Miscellaneous /Debug device detection, do you see both of your IP addresses in the list of IP addresses that the SMART_DEVICE_APP is listening to?
You can tell the wireless device driver in calibre to listen on a particular IP address in Preferences / Plugins / Device interface plugins / SmartDevice App interface.
Is either "guest mode" or "wireless isolation" enabled on your router?
Do you have a dual-band router that does not route between bands, and the linux machine is on a different band from the tablet?
Can the linux box "ping" the tablet? Can the tablet "ping" the linux box? If no to either one then something on your network is blocking packet flow between the two computers.

02-13-2016, 07:54 AM	#4
chaley Grand Sorcerer Posts: 12,461 Karma: 8025600 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	There are several things you can check. If you are using automatic connections: does the firewall on your Linux computer permit incoming connections to calibre on all ports? Alternatively you must open the port for you specified in the calibre wireless device driver setup for TCP and ports 54982, 48123, 39001, 44044, 59678 for UDP. If you are entering an IP+port into CC, does your firewall allow incoming connections on the port calibre wireless device setup? Do you have a firewall installed on the tablet, and if so have you allowed CC to make outgoing connections on both TCP and UDP? In calibre, if you run Preferences / Miscellaneous /Debug device detection, do you see both of your IP addresses in the list of IP addresses that the SMART_DEVICE_APP is listening to? You can tell the wireless device driver in calibre to listen on a particular IP address in Preferences / Plugins / Device interface plugins / SmartDevice App interface. Is either "guest mode" or "wireless isolation" enabled on your router? Do you have a dual-band router that does not route between bands, and the linux machine is on a different band from the tablet? Can the linux box "ping" the tablet? Can the tablet "ping" the linux box? If no to either one then something on your network is blocking packet flow between the two computers.