# Issues with Autointerface

_Help · started by Ken on Fri, May 22, 2026 1:37 AM_

---

## Original post

**Ken** · Fri, May 22, 2026 1:37 AM

I'd appreciate any help on the topic, I can't get autointerface to discover any of my devices on my local network. I've tried all combinations of phone, laptop, tablet on two different networks plus attempting to use my phone hotspot to bridge the other two. I've also tried with columba, ratspeak and meshchatx.

---

## Reply 1

**welo** · Fri, May 22, 2026 7:17 AM

I'm not exactly sure what the problem would be here (you need to provide some more details) but as a last resort if all else falls you could always set up the laptop as a backbone/tcpserver interface and connect everything through that by setting it as a transport node.

---

## Reply 2

**joakim** · Fri, May 22, 2026 8:17 AM

UDP traffic has to be allowed on ports `29716` and `42671` for it to work, so check any firewalls. Link-local IPv6 addresses must also be enabled on your system, which it should be by default.

---

## Reply 3

**Mark** · Fri, May 22, 2026 10:37 AM

And just to expand, you don't need any sort of IPv6 support on the network *infrastructure*, like APs, switches or anything. It just needs to be available in the OS of the devices running RNS.

But yeah, most likely it's a firewall issue, or your router / wifi AP is dropping or filtering multicast traffic. That's a common thing on some cheap ISP-provided routers, usually can be turned off in settings. Sometimes it's also bundled under the "client isolation" "feature".

---

## Reply 4

**Ken** · Tue, May 26, 2026 2:39 AM

Thanks for the help everyone. My ISP router does not support multicast so I guess I'd need a new router to be able to use autointerface.

---