KDE Connect Can't find my Device

[zpero]

Decided to read this wiki to figure it out:
https://userbase.kde.org/KDEConnect#Troubleshooting

sudo netstat -tunelp | grep -i kdeconnect
[sudo] password for zpero:
tcp6 0 0 :::1716 :::* LISTEN 1000 14266 1557/kdeconnectd
udp 0 0 0.0.0.0:5353 0.0.0.0:* 1000 14267 1557/kdeconnectd
udp 0 0 0.0.0.0:41998 0.0.0.0:* 1000 279309 1557/kdeconnectd
udp6 0 0 :::5353 :::* 1000 14268 1557/kdeconnectd
udp6 0 0 :::47191 :::* 1000 279310 1557/kdeconnectd
udp6 0 0 :::47193 :::* 1000 279311 1557/kdeconnectd
udp6 0 0 :::39822 :::* 1000 279312 1557/kdeconnectd
udp6 0 0 :::1716 :::* 1000 14265 1557/kdeconnectd

and,

netcat -z -v 1714-1764
(This takes over 2 minutes to do anything and fails to return anything at all when the command finally runs)

I ran these commands:

sudo firewall-cmd --permanent --zone=public --add-service=kdeconnect
sudo firewall-cmd --reload

They both said “success”

Devices still cannot find each other.
How do I get this to work?

I can transfer files between the two devices with bluetooth, but I don’t want to use Bluetooth I want to use WiFi. Here is some other data that might be helpful:

Plasma 6.0.1
Shell: zsh 5.9
Kernel: 6.7.9-arch1-1
My phone is a Pixel 8 Pro running GrapheneOS.

Thanks in advance.

[d-air1]

First try turning off the firewall just to see if it works, if it does then we know it is a firewall problem. We can then turn it back on and try and figure it out from there.

[zpero]

I disabled it with systemctl and confirmed it was inactive. After this, I opened the settings menu and went to the KDE Connect section. Clicked refresh, still not finding my phone. Phone still not finding PC.

netcat -z -v xxx.xxx.x.xxx 1714-1764

This command still takes over two minutes to run and returns absolutely nothing.
What’s the next step?

[d-air1]

If it can’t find it even without the firewall, then there is an option to manually add the device by it’s ip address. Try that.

[misanthrope]

It is the firewall causing the problem. See here for more info and the correct ports to open to allow the phone to be seen. Or as @d-air1b said, you could just disable it (I realize you didn’t necessarily mean to disable it permanently, rather for testing purposes).

[zpero]

Where is this option? I cannot find it.

[zpero]

Nope. I turned it off, and it still doesn’t work.

[d-air1]

Open the kdeconnect app on your phone and click the hamburger menu. Then click settings. From there look for add devices by ip.

[misanthrope]

Can you ping your phone from the computer?

Are you connected to a VPN on your phone?

[zpero]

This was actually the solution. I was connected to a VPN with “always-on VPN” and “Block connections without a VPN” also turned on. I disabled them, and I was able to find and connect to my PC.
I also tried re-enabling the firewall, and it still works, probably thanks to those commands from the wiki.

[misanthrope]

Brilliant! I had the same problem previously.