Calibre Server with Reverse Proxy

arcegabriel · 05-28-2026, 09:20 AM

I have Calibre server setup on windows 10. It is running as a service and listening to 8083. I have auth on
On the same server I setup iis reverse proxy. Goes from https/fqdn to the local on 8083

When I access direcly all good (ie inside home using the ip of the server)
When I access via the proxy, I get to calibre ok and get the auth prompt

1. If auth-mode is not included via CLI, I get Failed to communicate with "/calibre-web/interface-data/init?1779930038205", with status: [400 (error)]
The uri in the Request Line and the Authorization header do not match

2. If auth-mode is basic via CLI, after entering user/pass cycles back and ask again for user/pass. Forever

Appreciate any suggestions

arcegabriel · 05-28-2026, 09:42 PM

I solve the problem
The iis reverse proxy was configured to use the /calibre-web sufix
I removed it from the config and it no longers fails

05-28-2026, 09:20 AM	#1
arcegabriel Member Posts: 19 Karma: 10 Join Date: Jun 2017 Device: Android	Calibre Server with Reverse Proxy I have Calibre server setup on windows 10. It is running as a service and listening to 8083. I have auth on On the same server I setup iis reverse proxy. Goes from https/fqdn to the local on 8083 When I access direcly all good (ie inside home using the ip of the server) When I access via the proxy, I get to calibre ok and get the auth prompt 1. If auth-mode is not included via CLI, I get Failed to communicate with "/calibre-web/interface-data/init?1779930038205", with status: [400 (error)] The uri in the Request Line and the Authorization header do not match 2. If auth-mode is basic via CLI, after entering user/pass cycles back and ask again for user/pass. Forever Appreciate any suggestions Last edited by arcegabriel; 05-28-2026 at 09:58 AM.

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05-28-2026, 09:42 PM	#2
arcegabriel Member Posts: 19 Karma: 10 Join Date: Jun 2017 Device: Android	I solve the problem The iis reverse proxy was configured to use the /calibre-web sufix I removed it from the config and it no longers fails