SOLVED: Unable to connect via IP address. Only connects via loopback.

[jayjay]

Hi, I have an HP Thin Client T530 running Ubuntu 22.04.3 LTS.

Installed and running Jellyfin. Device IP address & port 192.168.1.33:9222.

Connected via the IP address locally and configured Jellyfin. Connected via Jellyfin app and Swiftfin app. Confirmed able to connect via tailscale using tailscale IP address and same port.

Unfortunately I can now only connect via the loopback address locally on Ubuntu - 127.0.0.1:9222. I can no longer connect via the IP address 192.168.1.33:9222 from Ubuntu or any other device, locally or via tailscale with the 100.x.

Jellyfin web

Local HTTP port number:
9222

Bind to local network address:
127.0.0.1/8, 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, 100.0.0.0/8, 192.168.1.33/24

I added the last entry just now but still no luck.
rebooted Ubuntu, no luck.
stopped and started Jellyfin service, no luck.

sudo ufw status
Status: inactive

sudo systemctl status jellyfin
jellyfin.service - Jellyfin Media Server
Loaded: loaded (/lib/systemd/system/jellyfin.service; enabled; vendor preset: enabled)
Drop-In: /etc/systemd/system/jellyfin.service.d
└─jellyfin.service.conf
Active: active (running) since Sun 2023-08-27 23:33:28 NZST; 1 day 8h ago
Main PID: 1071 (jellyfin)
Tasks: 21 (limit: 8162)
Memory: 635.6M
CPU: 4min 51.907s
CGroup: /system.slice/jellyfin.service
└─1071 /usr/bin/jellyfin --webdir=/usr/share/jellyfin/web --restartpath=/usr/lib/jellyfin/restart.sh --ffmpeg=/usr/lib/jellyfin-ffmpe>
Aug 29 08:01:10 MediaServer jellyfin[1071]: [08:01:10] [INF] Using LAN addresses: [10.0.0.0/8,172.16.0.0/12,192.168.0.0/16]
Aug 29 08:02:35 MediaServer jellyfin[1071]: [08:02:35] [INF] Defined LAN addresses : [10.0.0.0/8,172.16.0.0/12,192.168.0.0/16]
Aug 29 08:02:35 MediaServer jellyfin[1071]: [08:02:35] [INF] Defined LAN exclusions : []
Aug 29 08:02:35 MediaServer jellyfin[1071]: [08:02:35] [INF] Using LAN addresses: [10.0.0.0/8,172.16.0.0/12,192.168.0.0/16]
Aug 29 08:04:17 MediaServer jellyfin[1071]: [08:04:17] [INF] Defined LAN addresses : [10.0.0.0/8,172.16.0.0/12,192.168.0.0/16]
Aug 29 08:04:17 MediaServer jellyfin[1071]: [08:04:17] [INF] Defined LAN exclusions : []
Aug 29 08:04:17 MediaServer jellyfin[1071]: [08:04:17] [INF] Using LAN addresses: [10.0.0.0/8,172.16.0.0/12,192.168.0.0/16]
Aug 29 08:06:56 MediaServer jellyfin[1071]: [08:06:56] [INF] Defined LAN addresses : [10.0.0.0/8,172.16.0.0/12,192.168.0.0/16]
Aug 29 08:06:56 MediaServer jellyfin[1071]: [08:06:56] [INF] Defined LAN exclusions : []
Aug 29 08:06:56 MediaServer jellyfin[1071]: [08:06:56] [INF] Using LAN addresses: [10.0.0.0/8,172.16.0.0/12,192.168.0.0/16]

sudo ss -tulwn | grep LISTEN
tcp  LISTEN 0      4096                              127.0.0.53%lo:53        0.0.0.0:*         
tcp  LISTEN 0      4096                            100.107.252.135:50657      0.0.0.0:*         
tcp  LISTEN 0      10                                      0.0.0.0:36614      0.0.0.0:*         
tcp  LISTEN 0      128                                    127.0.0.1:631        0.0.0.0:*         
tcp  LISTEN 0      10                                      0.0.0.0:7070      0.0.0.0:*         
tcp  LISTEN 0      512                                    127.0.0.1:9222      0.0.0.0:*         
tcp  LISTEN 0      128                                        [::1]:631          [::]:*         
tcp  LISTEN 0      4096  [xxxxxxxxxxxxxxxxxxxxxxxxxx]:50657        [::]:*

ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether xxxxxxxx brd xxxxxxxx
inet 192.168.1.33/24 brd 192.168.1.255 scope global dynamic noprefixroute enp1s0
valid_lft 48814sec preferred_lft 48814sec

Ubuntu Firefox
Unable to connect
Firefox can’t establish a connection to the server at 192.168.1.33:9222.

If I connect using a different computer on the LAN, I get the following error.
This site can’t be reached192.168.1.33 refused to connect.
Try:
Checking the connection
Checking the proxy and the firewall
ERR_CONNECTION_REFUSED

I'm unsure where I can find the logs for this. Can anyone advise where the logs can be located.

Any suggestions on what I can do to access Jellyfin again via the IP address and why it has stopped responding to it.