Can't connect to Calbre server on my local Lan.

rickhan · 03-13-2025, 12:14 AM

I can connect to it using local host, but not from other computers or phones on my local LAN, both wireless and wired.
err: this page isn't working right now sent an invalid response

It's not working if I use the full IP address on the host computer (http://192.168.1.135:8080/#library_i...anel=book_list)

Working fine if I use:

http://[::1]:8080/#library_id=Library&panel=book_list

My Ubiquiti router has all local Lan ports open to all local traffic.
My Windows Firewall has Calibre added as a trusted app.

Turned the firewall off, still not working with the full IP address.

Not sure what I'm missing.

DNSB · 03-13-2025, 01:34 AM

Interesting that it works with a IP V6 loopback address. Have you tried 127.0.0.1 the IP V4 loopback address? Are you sure that 192.168.1.135 is the address for your LAN port? What does ipconfig /all show?

gbm · 03-13-2025, 02:09 AM

Make sure that you have "AP Isolation" disabled or turned off in your router. I believe that Ubiquiti calls it Network Isolation and Client Device Isolation.

If you have AP isolation turned on/enabled it will prevent devixces on the network from talking to each other.

bernie

Quote:

Originally Posted by rickhan

I can connect to it using local host, but not from other computers or phones on my local LAN, both wireless and wired.
err: this page isn't working right now sent an invalid response

It's not working if I use the full IP address on the host computer (http://192.168.1.135:8080/#library_i...anel=book_list)

Working fine if I use:

http://[::1]:8080/#library_id=Library&panel=book_list

My Ubiquiti router has all local Lan ports open to all local traffic.
My Windows Firewall has Calibre added as a trusted app.

Turned the firewall off, still not working with the full IP address.

Not sure what I'm missing.

rickhan · 03-13-2025, 11:54 AM

ipconfig /all confirms 192.168.1.135

I can connect to other computers on the Lan just fine through file manager.

doesn't work with 127.0.0.1 in my browser

theducks · 03-13-2025, 02:54 PM

Quote:

Originally Posted by rickhan

ipconfig /all confirms 192.168.1.135

I can connect to other computers on the Lan just fine through file manager.

doesn't work with 127.0.0.1 in my browser

127 has not worked for me for a long time on the host system (W10 pro)

DNSB · 03-13-2025, 03:03 PM

I had noticed an issue with connections but that was due to the web browser insisting on using https so I had to use http://127.0.0.1:9091 to connect.

rickhan · 03-13-2025, 03:51 PM

Quote:

Originally Posted by theducks

127 has not worked for me for a long time on the host system (W10 pro)

Trying to connect using 192.168.1.135:8080 doesn't work from any computer, including the host system.

Only the ipv6 loopback works--which is what you get if you choose browse the server from the Calibre menu.

theducks · 03-13-2025, 05:39 PM

Can you PING 192.168.1.135 from other systems?
Maybe IPv4 is disabled

kovidgoyal · 03-13-2025, 09:11 PM

Check the Preferences->sharing over the net->advanced->The interface to listen on is blank

rickhan · 03-13-2025, 09:28 PM

Quote:

Originally Posted by theducks

Can you PING 192.168.1.135 from other systems?
Maybe IPv4 is disabled

I can view the Web page on my server from the Calibre host machine using 192.168.1.20:8080

Something on this machine is preventing the Calibre web server from using ipv4 or ipv6 addresses(only ipv6 loopback works, but not full address)

Ping, net view, and explorer work just fine. Just the Calibre web server can only be accessed by the ipv6 loopback.

rickhan · 03-13-2025, 10:03 PM

Quote:

Originally Posted by kovidgoyal

Check the Preferences->sharing over the net->advanced->The interface to listen on is blank

Never had to do that before, and I've been using Calibre for many years.

The blank default doesn't work.

Many thanks,

Rick retired dev. I think bit rot has started in my brain

kovidgoyal · 03-13-2025, 10:15 PM

A value of blank means either use :: if the kernel has dualstack IP support or 0.0.0.0 otherwise.

03-13-2025, 12:14 AM	#1
rickhan Enthusiast Posts: 35 Karma: 10 Join Date: Jul 2010 Device: PC	Can't connect to Calbre server on my local Lan. I can connect to it using local host, but not from other computers or phones on my local LAN, both wireless and wired. err: this page isn't working right now sent an invalid response It's not working if I use the full IP address on the host computer (http://192.168.1.135:8080/#library_i...anel=book_list) Working fine if I use: http://[::1]:8080/#library_id=Library&panel=book_list My Ubiquiti router has all local Lan ports open to all local traffic. My Windows Firewall has Calibre added as a trusted app. Turned the firewall off, still not working with the full IP address. Not sure what I'm missing.

03-13-2025, 11:54 AM	#4
rickhan Enthusiast Posts: 35 Karma: 10 Join Date: Jul 2010 Device: PC	doesn't work with 127.0.0.1 ipconfig /all confirms 192.168.1.135 I can connect to other computers on the Lan just fine through file manager. doesn't work with 127.0.0.1 in my browser Last edited by rickhan; 03-13-2025 at 12:43 PM.

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03-13-2025, 01:34 AM	#2
DNSB Bibliophagist Posts: 43,482 Karma: 165170834 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	Interesting that it works with a IP V6 loopback address. Have you tried 127.0.0.1 the IP V4 loopback address? Are you sure that 192.168.1.135 is the address for your LAN port? What does ipconfig /all show?

03-13-2025, 03:03 PM	#6
DNSB Bibliophagist Posts: 43,482 Karma: 165170834 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	I had noticed an issue with connections but that was due to the web browser insisting on using https so I had to use http://127.0.0.1:9091 to connect.

03-13-2025, 05:39 PM	#8
theducks Well trained by Cats Posts: 30,782 Karma: 59840450 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	Can you PING 192.168.1.135 from other systems? Maybe IPv4 is disabled

03-13-2025, 09:11 PM	#9
kovidgoyal creator of calibre Posts: 45,005 Karma: 27109258 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Check the Preferences->sharing over the net->advanced->The interface to listen on is blank

03-13-2025, 10:15 PM	#12
kovidgoyal creator of calibre Posts: 45,005 Karma: 27109258 Join Date: Oct 2006 Location: Mumbai, India Device: Various	A value of blank means either use :: if the kernel has dualstack IP support or 0.0.0.0 otherwise.