# Syncthing and Calibre 404 not Found

**URL:** https://discuss.freedombox.org/t/syncthing-and-calibre-404-not-found/4239
**Category:** Support
**Created:** [May 12, 2026, 8:07pm UTC](https://discuss.freedombox.org/t/syncthing-and-calibre-404-not-found/4239 "2026-05-12T20:07:06Z")
**Posts on this page:** 1
**Showing post:** 12

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### Author: ![cj-macbeth](https://discuss.freedombox.org/user_avatar/discuss.freedombox.org/cj-macbeth/32/1697_2.png) [@cj-macbeth](https://discuss.freedombox.org/u/cj-macbeth)
#### Post date: [September 3, 2026, 6:29am UTC](https://discuss.freedombox.org/t/syncthing-and-calibre-404-not-found/4239/12 "2026-09-03T06:29:27Z")

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TLDR:

OpenIDConnect refuses to resolve .onion addresses, according to RFC 7686.

Workaround by modifying the Apache authentication settings for Calibre, or Calibre’s internal access-control settings (except don’t because the passwords are stored in plaintext, IIRC). Either way, you’re getting your hands dirty.

> [@Calibre returns 404 when visited through .onion address](https://discuss.freedombox.org/t/calibre-returns-404-when-visited-through-onion-address/4256):
>
> Problem Description Calibre is not accessible via the .onion site (Onion site is available, login and other apps function as expected via onion site) Steps to Reproduce Success Login to FreedomBox via local/IP Launch Calibre There be all the Books Steps to Reproduce Error Login to FreedomBox via .onion/Tor Browser (tried on Debian and Android) Launch Calibre There be no Books, no Books at all : ( Apache autogenerated 404 page The requested URL was not found on this server. Most Usef…

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