Can install but cannot access Webinterface

[Alex-joomla]

I installed the addon on my new HA installation:

CUPS Version 3.0.3

HA System:

Version	core-2024.2.5
Installation Type	Home Assistant OS
Development	false
Supervisor	true
Docker	true
User	root
Virtual Environment	false
Python Version	3.12.1
Operating System Family	Linux
Operating System Version	6.6.16-haos
CPU Architecture	x86_64
Timezone	Europe/Berlin
Configuration Directory	/config

It seems to run but if I try to get to the webinterface :631, I get a forbidden screen.

Log is:

Network interface enumeration completed.
Registering new address record for fe80::c0ec:bcff:feae:3b25 on vethc6027c3.*.
Registering new address record for fe80::f401:7cff:fec2:5c12 on veth88319ce.*.
Registering new address record for fe80::6089:9aff:fee1:c74 on veth1f14353.*.
Registering new address record for fe80::b0c7:9fff:feea:f2e8 on veth6f78aa4.*.
Registering new address record for fe80::4802:e3ff:fe4e:5171 on veth74716d5.*.
Registering new address record for fe80::e0d8:83ff:fea6:18ff on veth180de5f.*.
Registering new address record for fe80::3051:ffff:fe8c:9137 on veth351c658.*.
Registering new address record for fe80::42:29ff:fe23:4a40 on docker0.*.
Registering new address record for 172.30.232.1 on docker0.IPv4.
Registering new address record for fe80::42:dff:fe10:8169 on hassio.*.
Registering new address record for 172.30.32.1 on hassio.IPv4.
Registering new address record for fe80::3225:5797:b859:b3fc on enp0s18.*.
Registering new address record for 192.168.0.10 on enp0s18.IPv4.
Registering new address record for ::1 on lo.*.
Registering new address record for 127.0.0.1 on lo.IPv4.
[09:01:25] INFO: Preparing directories
'/etc/cups' -> '/data/cups'
'/etc/cups/cupsd.conf' -> '/data/cups/cupsd.conf'
'/etc/cups/cups-files.conf' -> '/data/cups/cups-files.conf'
'/etc/cups/cups-pdf.conf' -> '/data/cups/cups-pdf.conf'
'/etc/cups/interfaces' -> '/data/cups/interfaces'
'/etc/cups/ppd' -> '/data/cups/ppd'
'/etc/cups/raw.convs' -> '/data/cups/raw.convs'
'/etc/cups/raw.types' -> '/data/cups/raw.types'
'/etc/cups/snmp.conf' -> '/data/cups/snmp.conf'
'/etc/cups/ssl' -> '/data/cups/ssl'
removed directory '/etc/cups/ppd'
removed directory '/etc/cups/ssl'
removed '/etc/cups/raw.types'
removed '/etc/cups/cupsd.conf'
removed '/etc/cups/cups-pdf.conf'
removed '/etc/cups/raw.convs'
removed '/etc/cups/snmp.conf'
removed '/etc/cups/cups-files.conf'
removed directory '/etc/cups/interfaces'
removed directory '/etc/cups'
'/etc/cups' -> '/data/cups'
[09:01:25] INFO: Starting CUPS server as CMD from S6
Withdrawing address record for fe80::c0ec:bcff:feae:3b25 on vethc6027c3.
Withdrawing address record for fe80::f401:7cff:fec2:5c12 on veth88319ce.
Withdrawing address record for fe80::6089:9aff:fee1:c74 on veth1f14353.
Withdrawing address record for fe80::b0c7:9fff:feea:f2e8 on veth6f78aa4.
Withdrawing address record for fe80::4802:e3ff:fe4e:5171 on veth74716d5.
Withdrawing address record for fe80::e0d8:83ff:fea6:18ff on veth180de5f.
Withdrawing address record for fe80::3051:ffff:fe8c:9137 on veth351c658.
Withdrawing address record for fe80::42:29ff:fe23:4a40 on docker0.
Withdrawing address record for 172.30.232.1 on docker0.
Withdrawing address record for fe80::42:dff:fe10:8169 on hassio.
Withdrawing address record for 172.30.32.1 on hassio.
Withdrawing address record for 192.168.0.10 on enp0s18.
Withdrawing address record for ::1 on lo.
Withdrawing address record for 127.0.0.1 on lo.
Host name conflict, retrying with 1e14b3fb-cups-2
Registering new address record for fe80::c0ec:bcff:feae:3b25 on vethc6027c3.*.
Registering new address record for fe80::f401:7cff:fec2:5c12 on veth88319ce.*.
Registering new address record for fe80::6089:9aff:fee1:c74 on veth1f14353.*.
Registering new address record for fe80::b0c7:9fff:feea:f2e8 on veth6f78aa4.*.
Registering new address record for fe80::4802:e3ff:fe4e:5171 on veth74716d5.*.
Registering new address record for fe80::e0d8:83ff:fea6:18ff on veth180de5f.*.
Registering new address record for fe80::3051:ffff:fe8c:9137 on veth351c658.*.
Registering new address record for fe80::42:29ff:fe23:4a40 on docker0.*.
Registering new address record for 172.30.232.1 on docker0.IPv4.
Registering new address record for fe80::42:dff:fe10:8169 on hassio.*.
Registering new address record for 172.30.32.1 on hassio.IPv4.
Registering new address record for fe80::3225:5797:b859:b3fc on enp0s18.*.
Registering new address record for 192.168.0.10 on enp0s18.IPv4.
Registering new address record for ::1 on lo.*.
Registering new address record for 127.0.0.1 on lo.IPv4.
Withdrawing address record for fe80::c0ec:bcff:feae:3b25 on vethc6027c3.
Withdrawing address record for fe80::f401:7cff:fec2:5c12 on veth88319ce.
Withdrawing address record for fe80::6089:9aff:fee1:c74 on veth1f14353.
Withdrawing address record for fe80::b0c7:9fff:feea:f2e8 on veth6f78aa4.
Withdrawing address record for fe80::4802:e3ff:fe4e:5171 on veth74716d5.
Withdrawing address record for fe80::e0d8:83ff:fea6:18ff on veth180de5f.
Withdrawing address record for fe80::3051:ffff:fe8c:9137 on veth351c658.
Withdrawing address record for fe80::42:29ff:fe23:4a40 on docker0.
Withdrawing address record for 172.30.232.1 on docker0.
Withdrawing address record for fe80::42:dff:fe10:8169 on hassio.
Withdrawing address record for 172.30.32.1 on hassio.
Withdrawing address record for 192.168.0.10 on enp0s18.
Withdrawing address record for ::1 on lo.
Withdrawing address record for 127.0.0.1 on lo.
Host name conflict, retrying with 1e14b3fb-cups-3
Registering new address record for fe80::c0ec:bcff:feae:3b25 on vethc6027c3.*.
Registering new address record for fe80::f401:7cff:fec2:5c12 on veth88319ce.*.
Registering new address record for fe80::6089:9aff:fee1:c74 on veth1f14353.*.
Registering new address record for fe80::b0c7:9fff:feea:f2e8 on veth6f78aa4.*.
Registering new address record for fe80::4802:e3ff:fe4e:5171 on veth74716d5.*.
Registering new address record for fe80::e0d8:83ff:fea6:18ff on veth180de5f.*.
Registering new address record for fe80::3051:ffff:fe8c:9137 on veth351c658.*.
Registering new address record for fe80::42:29ff:fe23:4a40 on docker0.*.
Registering new address record for 172.30.232.1 on docker0.IPv4.
Registering new address record for fe80::42:dff:fe10:8169 on hassio.*.
Registering new address record for 172.30.32.1 on hassio.IPv4.
Registering new address record for fe80::3225:5797:b859:b3fc on enp0s18.*.
Registering new address record for 192.168.0.10 on enp0s18.IPv4.
Registering new address record for ::1 on lo.*.
Registering new address record for 127.0.0.1 on lo.IPv4.
Server startup complete. Host name is 1e14b3fb-cups-3.local. Local service cookie is 29212888.```

[bmorgenthaler]

I have the same issue and it ties into issue #15 as well. Basically you need to modify cupsd.conf and change the following
Port 631 -> Listen *:631 this will allow you to access the admin interface. However you still might get an error so you have to add
ServerAlias <fqdn of HA>

I had to do this by remoting into HA and then
docker exec -it addon_2c6aefcc_cupsik /bin/bash to get into the container then use nano to edit /data/cupsd.conf

You'll have to do this every time the container restarts because it overwrites cupsd.conf

[Qhilm]

Typing https://<IPv4>:631 or https://[<IPv6>]:631 works for me, but typing https://<FQDN>:631 gives me Bad Request.

[pbov]

After the installation I also ran into this issue. Could be an improvement to allow all hosts. this is also discussed here: https://serverfault.com/questions/836266/how-can-i-enable-remote-access-to-the-admin-page-in-cups