MobileRead Forums - View Single Post

chaley · 01-03-2018, 06:52 AM

Looking at calibre log I see:

Calibre connects successfully to the wireless device network socket.
Calibre did not see any attempt to connect on that socket.
Calibre did not see any "are you there" broadcasts.

Looking at the CC log I see:

CC "sees" calibre's MDNS (bonjour) advertisements.
Sometimes when connecting, CC "sees" multiple bonjour advertisements. This shouldn't happen. Do you have multiple instances of calibre running?
Starting at 2018-01-03 09:25:32, CC sees calibre's wireless device UDP broadcast response but fails to connect (TCP) to the supplied IP address. This strongly implies a firewall problem.
Some connection attempts fail with "no route to host". Others fail with a timeout. I don't know why that would happen.

Given the above, all I can say with certainty is that something is preventing CC from connecting to calibre. Exactly what the "something" is I cannot say, but it "smells" like a firewall somewhere.

Questions:

Are TCP connections to port 9091 allowed through your firewall?
Does your home router have any filtering set up?
What happens if you turn off the content server in calibre then change the WD port to 8080?
Do you have any intrusion detection software running on your Linux box?
I note from your tcpdump that port 9091 is identified as xmltec-xmlmail. Do you have any sort of auto-start based on port numbers? What happens if you set the calibre WD port to something bizarre (and unassigned) such as 14802?

01-03-2018, 06:52 AM	#2
chaley Grand Sorcerer Posts: 12,476 Karma: 8025702 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	Looking at calibre log I see: Calibre connects successfully to the wireless device network socket. Calibre did not see any attempt to connect on that socket. Calibre did not see any "are you there" broadcasts. Looking at the CC log I see: CC "sees" calibre's MDNS (bonjour) advertisements. Sometimes when connecting, CC "sees" multiple bonjour advertisements. This shouldn't happen. Do you have multiple instances of calibre running? Starting at 2018-01-03 09:25:32, CC sees calibre's wireless device UDP broadcast response but fails to connect (TCP) to the supplied IP address. This strongly implies a firewall problem. Some connection attempts fail with "no route to host". Others fail with a timeout. I don't know why that would happen. Given the above, all I can say with certainty is that something is preventing CC from connecting to calibre. Exactly what the "something" is I cannot say, but it "smells" like a firewall somewhere. Questions: Are TCP connections to port 9091 allowed through your firewall? Does your home router have any filtering set up? What happens if you turn off the content server in calibre then change the WD port to 8080? Do you have any intrusion detection software running on your Linux box? I note from your tcpdump that port 9091 is identified as xmltec-xmlmail. Do you have any sort of auto-start based on port numbers? What happens if you set the calibre WD port to something bizarre (and unassigned) such as 14802?