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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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[–] [email protected] 1 points 1 year ago (2 children)

There's some confusion here. I'm running wireguard on my opnsense router and I'm trying to connect my Android phone to it.

I just used the VPS to help troubleshoot to show other clients can connect to opnsense AND the phone can connect to other servers but the phone and opn won't talk.

I know this screams config issue. I've gone over it and rebuilt it multiple times. I can't find anything wrong. Someone else asked to see configs so I'll post those tomorrow.

[–] [email protected] 2 points 1 year ago

It is a config issue. Allowed IPs for your client should be 0.0.0.0/0 not 0.0.0.0/32