Question

How do I setup port forwarding properly with Qwest DSL modem and Linksys router?

Asked by: saxguy

I have a PPPoA DSL account with Qwest modem and a Linksys router.

The Actiontec has DHCP turned on 192.168.0.1
The Linksys has DHCP turned on as well 192.168.1.1
The Linksys features DynDNS and seems to be updating the correct WAN IP.

Where and how should I configure Port Forwarding to allow RDP 3389 to work across the Internet?

It's currently port fowarding on the Linksys to IP 192.168.1.100.
I also setup port forwarding on the modem to 192.168.0.1

What do I have to do to enable this to work? Right now, my FQDN for the DynDNS client is resolving the 192.168.0.x address space.

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Asked On
2005-12-28 at 16:25:07ID21677813
Tags

port

,

qwest

,

dsl

,

forwarding

,

modem

Topics

Telecommunications Providers

,

Wireless Network Cards & Adapters

,

Miscellaneous Networking

Participating Experts
3
Points
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Comments
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Answers

 

by: irwinpksPosted on 2005-12-28 at 18:41:42ID: 15568137

You got several issues..

1st one...

You can only have 1 DHCP on your network. Unless you are fronting either one of your routers, and the intention is to have separate isolated networks.  Since the Linsys is grabbing the correct WAN IP that's a good sign.... so to clarify you have the Qwest Actiontec BEHIND the Linksys?

2nd...

Linksys routers come in different flavors, what model?

3rd...
You wanna open port RDP 3339, why?

4th...

Is there a need to have 2 routers on your network?  

Please advise

 

by: RobWillPosted on 2005-12-28 at 19:30:10ID: 15568322

The way you would normally do this is to switch the Actiontec modem from NAT mode to Bridge mode and then configure the PPPoA connection on the WAN page of the Linksys. Then the Linksys will appear to sit directly on the Internet and make your port forwarding more easily configurable and assign your DDNS service a public IP rather than the private IP you are getting. However, your Linksys has Dynamic, Static, and PPPoE options, but does it have PPPoA? Most don't as of yet. There may be a firmware upgrade available on their site that would enable this. Make sure you check the European Linksys sites for the firmware.

 

by: saxguyPosted on 2006-01-06 at 16:54:23ID: 15635006

I don't believe the Linksys has a PPPoA connection but will look when I get back to the clients office. THEN I would turn off NAT on the Actiontec. I believe the answer will be closer to this one which I posted not too long ago and invloved a D-Link router.
 Title: How do I setup my D-Link DI-604 router to work with a Qwest/Actiontec modem?
~~~~~~~~~~~~~~

The Dlink should have a WAN setting and a LAN setting.

Disable DHCP on the modem.

Assign the WAN setting of the Dlink to 192.168.0.2
Subnet is 255.255.255.0
Gateway is 192.168.0.1

DNS - get from your ISP.


on the LAN side, assign the IP 192.168.1.1
Turn on DHCP on the DLINK

Connect the modem ethernet to the WAN(Internet) port of the DLINK.

Plug your workstation into any other port on the DLINK.

Make sure Windows is set to obtain an IP Automatically.

The DLINK should give your workstation an ip of 192.168.1.x (whatever the next available # in DHCP scope is)

You should have internet access.

 

by: RobWillPosted on 2006-01-06 at 18:30:58ID: 15635295

You should have no problem a all getting an Internet connection using the configuration you show with the D-link. However, port forwarding with that configuration becomes much more complicated and might not work, at least not with all services. In that configuration you have to enable port forwarding on the Quest Modem to the Linksys router, and then on the Linksys router to the workstation. In this situation both the modem and router are forwarding and performing NAT (Network Address Translation). This is called double NATing a will not work with VPN's and some other file sharing applications.

If you are able to configure as in my original post by putting the Modem in bridge mode the ISP's WAN address is assigned to the Linksys WAN configuration, effectively by-passing the NATing on the modem. Then all services can be configured quite easily.

Let us know how you make out. Glad to add details where necessary.

 

by: saxguyPosted on 2006-01-06 at 18:38:00ID: 15635311

Yep agreed. Will check the Linksys for PPPoA and go from there. Thanks for the explanation on the double NATing. What will be the IP of the first forwarded port then, 192.168.1.1?

 

by: RobWillPosted on 2006-01-06 at 18:57:43ID: 15635365

Not quite sure which connection has which IP from the description [I'm easily confused :) ] but using the following example:

Configuration #1 with double NATing (Quest in NAT mode)
Quest WAN = [something like] 66.66.123.123 (probably assigned with DHCP)
Quest LAN =192.168.0.1
Linksys WAN =192.168.0.2
Linksys LAN =192.168.1.1
Linksys DHCP config for LAN = 192.168.1.100-150
First workstation = 192.168.1.100
Here on the Quest you would forward WAN port 3389 to 192.168.0.2  port 3389
and on the Linksys forward WAN port 3389 to 192.168.1.100 port 3389
-------------------------------------------------
Configuration #2 (Quest in Bridge mode)
Quest WAN = [something like] 66.66.123.123 (probably assigned with DHCP)
Quest LAN =192.168.0.1 (unimportant- not even sure what it assigns in Bridge mode)
Linksys WAN =[something like] 66.66.123.123 (same as Quest WAN probably assigned with DHCP)
Linksys LAN =192.168.1.1
Linksys DHCP config for LAN = 192.168.1.100-150
First workstation = 192.168.1.100
No forwarding on Quest
and on the Linksys forward WAN port 3389 to 192.168.1.100 port 3389

Couple of notes.
1) In config #1 The Linksys obtains an IP from the Quest dynamically. If this ever changes you will loose your port forwarding. You might want to assign the Linksys LAN statically.
2) A basic router is the subnets on either side of any router have to be different so regardless of how you configure the Linksys the LAN and WAN have to have different 3rd octets like 192.168.0.x and 192.168.1.x
3) Configuration #1 may not work for port forwarding, but should for Remote Desktop

 

by: saxguyPosted on 2006-01-06 at 19:02:09ID: 15635374

>>1) In config #1 The Linksys obtains an IP from the Quest dynamically. If this ever changes you will loose your port forwarding. You might want to assign the Linksys LAN statically

Yes on the Linksys WAN side it there would be a static assignment.

Will advise when I try it out. thanks again

 

by: RobWillPosted on 2006-01-06 at 20:27:59ID: 15635650

Great, good luck!
--Rob

 

by: irwinpksPosted on 2006-01-12 at 21:18:32ID: 15688974

Hey, this is still open.. what's the status?  Any new development?  I would like to table this or help you out.  If there is a valid answer could you please grade accordingly.  If there were many input from other's splitting the poinst would be good as we invested our time in helping you out.  Please advise.

 

by: saxguyPosted on 2006-01-12 at 22:05:30ID: 15689279

I can't get to the router until next wednesday when the owner gets back. I will try it out then and advise.

thanks

 

by: irwinpksPosted on 2006-01-12 at 22:15:03ID: 15689310

OK... thank you for the update.. thought you forgot about us...

 

by: saxguyPosted on 2006-01-18 at 16:36:40ID: 15735060

Great job RobWill, thanks for your patience....

 

by: RobWillPosted on 2006-01-18 at 16:58:06ID: 15735185

Thanks saxguy ,
--Rob

20120131-EE-VQP-002

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