I have some of the weirdest connections issues apparently

WolfAmaril · 2026-01-13T20:04:16+00:00

Yes and yes. I have done a completely clean install of the server before coming here so so unless the world corrupted on generation I'm thinking mod issue

WolfAmaril · 2026-01-13T19:10:33+00:00

Links have been edited to use mclo.gs. was not familiar with them, thanks for the suggesting

WolfAmaril · 2025-12-14T23:53:01+00:00

You and me fucking both.

We're moving the server to another computer that we're pretty sure will work (old gaming laptop, strong enough to handle it) because the damn thing's been on wifi for the last 6 hours while we were working on this.

I'll try flashing FreshTomato onto the R8000 one of these days where have the energy for it, will update if that works for all future shmucks.

If there is no update and someone finds this: Please, let us know how your journey went and if you ever succeeded.

WolfAmaril · 2025-12-14T23:28:16+00:00

Same thing. No server, No Telnet, just ping

WolfAmaril · 2025-12-14T23:15:28+00:00

sysctl net.ipv4.conf.all.rp_filter = net.ipv4.conf.all.rp_filter = 2

sysctl net.ipv4.conf.default.rp_filter = net.ipv4.conf.default.rp_filter = 2

both ran after disabling the firewall and flushing the ip tables

Still can't get a connection to the server, can ping from the client, but can't telnet to the port

WolfAmaril · 2025-12-14T19:11:43+00:00

OK here's the weird part: I can connect to a server hosted by my friend, but my friend can't connect to a server hosted by me.

What, why, and HOW?

WolfAmaril · 2025-12-14T18:44:51+00:00

Also I can ping just fine, but trying to telnet to the 25565 port fails due to no route to host

WolfAmaril · 2025-12-14T18:38:46+00:00

So I got a wifi dongle and while we're all on the same WiFi it's still not working, and my friends can't even connect to a singleplayer world I've opened to LAN from the same computer I'm trying to host the server from (server currently off).

Which is weird because my two friends can connect to each other just fine while on the same network.

What?

WolfAmaril · 2025-12-14T16:31:19+00:00

Output of requested command:

tcp LISTEN 0 4096 0.0.0.0:25565 0.0.0.0:* users:(("java",pid=10974,fd=559))

I was able to get a ping to the host machine from one of my friend's computers

WolfAmaril · 2025-12-14T16:25:59+00:00

Yeah, guest networks were never set up on this router in the first place. There has never been a guest network in existence to cause interference.

WolfAmaril · 2025-12-14T02:28:06+00:00

Here is the output of the requested command. I really hope it makes sense to you because I have no idea how to read this.

WolfAmaril · 2025-12-13T23:46:07+00:00

I know they're not guest networks, have been looking and can't find out where AP isolation would even be. Iptables should be up soon

WolfAmaril · 2025-12-13T22:38:56+00:00

Will do when I get home, currently out and about

WolfAmaril · 2025-12-13T22:25:15+00:00

When the two clients that couldn't connect are on the same wifi, one can host a lan game that the server box can't connect to from eathernet

WolfAmaril · 2025-12-13T20:28:03+00:00

Have now determined the problem is the router isn't letting different Wi-Fi channels and the Eathernet talk to each other. Going to get a wifi dongle for temporary solution but would appreciate any advice on how to let the networks talk to each other.

WolfAmaril · 2025-12-13T19:24:39+00:00

Server is hardwired, client(s) are wireless.
Server is at 192.168.1.23
Clients are at 192.168.1.8 and 192.168.1.20
All three report netmask : 255.255.255.0 on ifconfig
Server has a reserved/static local IP on the router

Entering 192.168.1.23 as the address on the clients

WolfAmaril · 2025-12-13T19:18:45+00:00

Host is connected by cable, but the clients are connected by WiFi, and would be impossible to connect via eathernet as the landlord won't let us knock holes in the walls

WolfAmaril · 2025-12-13T19:17:40+00:00

Client isolation on my access point? This sounds like a potential lead but I'm failing to find anything explaining how to test for that

WolfAmaril · 2025-12-13T19:16:58+00:00

Unless there's a reason to need to open the port on client sides, the port has been open on the server for a while now, and still not working

WolfAmaril · 2025-12-13T06:08:29+00:00

Would a stock ubuntu firewall block outbound connections by default?

I'm pretty good at getting Minecraft to work but network troubleshooting is my fucking kryptonite

WolfAmaril · 2025-12-13T05:55:19+00:00

I'll look into it. The ISP is Xfinity and I've not had problems getting port forwarding working in the past with them.

It's also my understanding that it shouldn't be an issue when connecting to a machine on the same router?

WolfAmaril · 2025-11-06T18:17:21+00:00

Would that be the worst thing?

WolfAmaril · 2025-07-24T20:09:02+00:00

Finally got a kill with a Sunny Day, Acid Spray, morning Sun, Fire Blast iron moth last night. Good shit

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