Hard Light Productions Forums

Off-Topic Discussion => General Discussion => Topic started by: Hunter on July 05, 2005, 10:33:22 am

Title: DHCP and port forwarding
Post by: Hunter on July 05, 2005, 10:33:22 am
Ok. I'm using a Creative 8133U router. I'm trying to free up some ports, but it's like fighting the worst router ever created... It just doesn't work. I've heard that DHCP can cause problems for NAT routers(?) so I thought I'd disable it and assign a static IP address.

My router is on 192.168.1.1, subnet 255.0.0.0
My PC has been on 192.168.1.9, subnet 255.255.255.0

That's how DHCP always assigned it... So I just set the static values to the same. And while I can still communicate with the router, I can no longer see my internet connection through the router. Everything looks ok, it just doesn't work... Is there something in my router settings I missed before disabling DHCP?
Title: DHCP and port forwarding
Post by: vyper on July 05, 2005, 10:44:35 am
DHCP should not be causing problems with NAT, since it rarely changes IPs for hardware on home-sized LANs.
Title: DHCP and port forwarding
Post by: Hunter on July 05, 2005, 10:52:46 am
Well something isn't right, because port forwarding just isn't working. I try to host a game server and no one can see it, but I can see it on the LAN.
Title: DHCP and port forwarding
Post by: vyper on July 05, 2005, 11:01:03 am
Silly question time - are you giving them your external IP?
Title: DHCP and port forwarding
Post by: kasperl on July 05, 2005, 11:14:26 am
DHCP also sometimes gives DNS info. Check with your windows networking settings to see what DNS is set.
Title: DHCP and port forwarding
Post by: Hunter on July 05, 2005, 11:41:34 am
No DNS is set.

No silly questions please. ;)
Title: DHCP and port forwarding
Post by: kasperl on July 05, 2005, 12:42:47 pm
Well, not getting web acess might be due to a lack of DNS settings....
Title: DHCP and port forwarding
Post by: Hunter on July 05, 2005, 12:47:22 pm
Well, I did try to enter manual DNS info obtained from the ISP, but that didn't work either. Wheres that trusty hardware hammer of mine.
Title: DHCP and port forwarding
Post by: kasperl on July 05, 2005, 01:36:42 pm
Ehm, if you do ping bbc.co.uk, what does it show?

(If you haven't got a clue what I'm on about, do the following:
start, run, command.com
enter
ping bbc.co.uk > c:\HLPOWNZ.txt
Open the file c:\HLPOWNZ.txt, and copy the contents onto the forum.)
Title: DHCP and port forwarding
Post by: Hunter on July 05, 2005, 01:54:10 pm
Ok, I got it working. I set the DNS to my Router IP, and walla. I was thinking of the DNS assigned by the ISP.

Still no luck with port forwarding mind you. Useless bloody thing... Even enabling DMZ and no one can see my server still. I mean, DMZ opens all ports, and yet nothing... WTF is going on.
Title: Re: DHCP and port forwarding
Post by: karajorma on July 05, 2005, 03:44:56 pm
Quote
Originally posted by Hunt Smacker
Ok. I'm using a Creative 8133U router. I'm trying to free up some ports, but it's like fighting the worst router ever created... It just doesn't work. I've heard that DHCP can cause problems for NAT routers(?) so I thought I'd disable it and assign a static IP address.

My router is on 192.168.1.1, subnet 255.0.0.0
My PC has been on 192.168.1.9, subnet 255.255.255.0

That's how DHCP always assigned it... So I just set the static values to the same. And while I can still communicate with the router, I can no longer see my internet connection through the router. Everything looks ok, it just doesn't work... Is there something in my router settings I missed before disabling DHCP?


This probably isn't what's causing your problem but why are you supernetting your router? Unless you've got 16 million computers on your LAN I really can't see the need for not just having a subnet mask of 255.255.255.0 :)

Oh and congratulations on finding a router PortForward.com (http://www.portforward.com/routers.htm) had never heard of. I was going to link you to their site but it probably won't be much help.
Title: DHCP and port forwarding
Post by: Hunter on July 05, 2005, 05:21:47 pm
I already posted there. Still waiting ;)

I'm notorious for hardware issues no one has ever heard of.
Title: DHCP and port forwarding
Post by: Taristin on July 05, 2005, 05:25:06 pm
Maybe you're just describing things wrong? :p
Title: DHCP and port forwarding
Post by: mrduckman on July 06, 2005, 09:16:03 am
Hmm.
Is the Creative Router and ADSL modem? If so, and is acting like a router with a DHCP active, are you absolutely sure that the router is using netmask 255.0.0.0?
By default the network 192.168.1.0 has a netmask of 255.255.255.0
So, either the dhcp is giving addresses with the wrong netmask?

In any case, you should try the connectivity to your router first, rather than check for internet connectivity.
If you can ping your router, you should have internet connectivity. If it's connected, of course.
Title: DHCP and port forwarding
Post by: Hunter on July 06, 2005, 01:28:37 pm
I already fixed the problem.

But port forwarding doesn't work, nor does enabling of DMZ. I guess its just a flawed router, because with any normal router, enabling DMZ means = all ports open on specified IP, and port forwarding means "those ports are open" on the specified IP...

My guess is, something else is preventing my server from appearing (let's just use Unreal Tournament as an example). But, I've tried fiddling with everything in the router to no avail, the server does not appear on the Internet. Only on the LAN, and no one can ping it from the Internet, either.
Title: DHCP and port forwarding
Post by: mrduckman on July 06, 2005, 03:30:52 pm
Hmm. Indeed, either port forwarding is not working or your ISP is blocking the ports?

Get a Linksys :P
Title: DHCP and port forwarding
Post by: Hunter on July 06, 2005, 05:01:02 pm
Send me a free one? :P

No, the ISP is not, because my USB Modem works fine with servers (but its trash, so I'm not using it...)
Title: DHCP and port forwarding
Post by: mrduckman on July 07, 2005, 10:27:53 am
Build a linux box? :P