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[Fixed] Weird Wireguard issues I could use some help with. (lemmy.procrastinati.org)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

28 comments fedilink hide all child comments

I've hit a wall with a weird Wireguard issue. I'm trying to connect my phone (over cell) to my home router using wireguard and it will not connect.

The keys are all correct.
The IPs are all correct.
The ports are open on the firewall.
My router has a public IP, no CGNAT.

The router is opnsense, I have a tcpdump session going and when I attempt a connection from the phone I see 0 packets on that port. I am able to ping the router and reach the web server sitting behind it from the phone.

I have a VPS that I configured WG on and the phone connects fine to that. I also tested configuring the VPS to connect to my home router and that also works fine.

I'm really at a loss as to where to go next.

Edit 2: I completely blew out the config on both sides and rebuilt it from scratch, using a different UDP port, and it all appears to be working now. Thanks for everyone's help in tracking this down.

Edit: It was requested I provide my configs.

opnsense:

####################################################
# Interface settings, not used by `wg`             #
# Only used for reference and detection of changes #
# in the configuration                             #
####################################################
# Address =  172.31.254.1/24
# DNS =
# MTU =
# disableroutes = 0
# gateway =

[Interface]
PrivateKey = 
ListenPort = 51821

[Peer]
# friendly_name = note20
PublicKey = 
AllowedIPs = 172.31.254.100/32

Android:

[Interface]
Address = 172.31.254.100/32
PrivateKey = 

[Peer]
AllowedIPs = 0.0.0.0/32
Endpoint = :51821
PublicKey =

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[–] baascus 2 points 1 year ago (1 children)

I’ve encountered a similar issue with WireGuard on my iOS and macOS devices. On iOS, I need to first connect to the VPN, then disable and re-enable both Wi-Fi and cellular data before the traffic begins flowing through the tunnel. On macOS, the process involves connecting the tunnel and toggling Wi-Fi off and on. It seems like I have to reset the network connection on the device after establishing the tunnel to get it working. I’m also using OPNsense with the WireGuard plugin.

Sounds like it may be the same issue so I hope that this helps!

[–] [email protected] 1 points 1 year ago

I'll give it a try, thanks.