this post was submitted on 20 Dec 2023
27 points (93.5% liked)

Selfhosted

40347 readers
401 users here now

A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

Rules:

  1. Be civil: we're here to support and learn from one another. Insults won't be tolerated. Flame wars are frowned upon.

  2. No spam posting.

  3. Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it's not obvious why your post topic revolves around selfhosting, please include details to make it clear.

  4. Don't duplicate the full text of your blog or github here. Just post the link for folks to click.

  5. Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).

  6. No trolling.

Resources:

Any issues on the community? Report it using the report flag.

Questions? DM the mods!

founded 1 year ago
MODERATORS
ruud@lemmy.world
Loki@lemmy.world
CannaVet@lemmy.world
devve@lemmy.world
HybridSarcasm@lemmy.world
HybridSarcasm@lemmy.hybridsarcasm.xyz
27
[Fixed] Weird Wireguard issues I could use some help with. (lemmy.procrastinati.org)
submitted 11 months ago* (last edited 11 months ago) by SeeJayEmm@lemmy.procrastinati.org to c/selfhosted@lemmy.world
29 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 =
you are viewing a single comment's thread
view the rest of the comments
[–] lemming741@lemmy.world 2 points 11 months ago (1 children)

Have you been down the MTU rabbit hole? The wg-quick helper scripts are supposed to find the best MTU but I've found cases (tethering) where I had to adjust. Too big an MTU and you could silently drop packets.

Are you virtualizing opnsense? I am, and the wg plugins and config felt foreign to me it was easier to virtualize a wg endpoint.

[–] SeeJayEmm@lemmy.procrastinati.org 1 points 11 months ago

Have you been down the MTU rabbit hole?

No. I'm going to look into that and do some testing today. Perhaps there's something wonky between my mobile and home ISPs in that regard.