UDP through a router

Kol · 2 Feb 2006 at 22:53

Hi guys,

Anyone help? I have Linksys WRT54GS and I'm trying to view a stream which is using UDP. If I plug the internet connection directly to my laptop via RJ45, I can view the stream. If I use the router, the stream doesn't work. It's as if there is nothing there.

I have tried the DMZ, tried forwarding the port. Maybe something I'm missing?

Ta.

oldbag · 2 Feb 2006 at 23:00

What port is it using on UDP?

Kol · 2 Feb 2006 at 23:01

Port 1234 mate.

oldbag · 2 Feb 2006 at 23:01

Open port 1234 outgoing on the router..... That should work

Kol · 2 Feb 2006 at 23:03

I tried port forwarding the port 1234 to my laptop, but it doesn't appear to work.

thanks for your help.
Mike

oldbag · 2 Feb 2006 at 23:04

You shouldn't have to port forward, just opening the port outgoing should be fine. Try connecting to the stream and see if you get any logs for the stream....

Kol · 2 Feb 2006 at 23:07

OK, I cannot find an option to open a port (with this router) only the option to port forward. I will try streaming (with ethereal open) when connected directly, see if it suggests anything else needs opening.

oldbag · 2 Feb 2006 at 23:08

Odd. That's a weird router if it doesn't allow you to open/close ports.

Kol · 2 Feb 2006 at 23:11

I've had three, D-Link, Netgear and finally Linksys, can't say I've ever noticed it on those three :confused:

Have you any experience of a Linksys at all bud?

oldbag · 2 Feb 2006 at 23:13

Nah. I tried a d-link once and that was horrible. The main problem seems to be that many routers have dodgy web interfaces, and options which make no sense. Then you get the dodgy manuals which seem to be translated from Japanese or something.

I assume it has a firewall and stuff on it? I assume that it allows you to configure it?

Kol · 2 Feb 2006 at 23:14

Aye, it has a firewall, which has been duly disabled. The only security options regarding ports are forwarding and triggering, then obivously uPNP

oldbag · 2 Feb 2006 at 23:16

Well, if there's no firewall enabled, have you got one on your PC? Is nat enabled on the router (I assume it is)

Kol · 2 Feb 2006 at 23:18

Nope. The only difference is that when connect directly, it works and when connected via the router it doesn't. I don't use a firewall on this computer (silly I know, but there are reasons) so it's not a firewall causing the problem as it can usually connect when plugged in directly.

Yes, NAT is enabled! It's not often I'm stumped by things like this, but oddly, I am. When I had the D-Link, it worked fine. The Netgear wouldn't... this doesn't yet, however, so far this router is rock solid.

oldbag · 2 Feb 2006 at 23:19

So, is your gateway on your pc set to the router's internal LAN IP? I take it you can browse the net normally through the router?

Kol · 2 Feb 2006 at 23:20

Everything works through the router, apart from this UDP stream yeah. The laptop has an IP, gateway, DNS etc. Internet works, mail works, etc. just this damn stream. Maybe it's a sign, who knows

oldbag · 2 Feb 2006 at 23:21

And it's definitely that port?

oldbag · 2 Feb 2006 at 23:24

The only thing i can think of is that NAT on the router isn't working properly.

Kol · 2 Feb 2006 at 23:32

Cheers for your help buddy. Not a problem. I'll just not bother with watching TV, it can only be a good thing.

oldbag · 2 Feb 2006 at 23:34

hehe, no worries.