Solved

How can I use LAN ports ONLY on a Linksys Wireless WRT54G?

Posted on 2008-06-15
8
507 Views
Last Modified: 2010-04-21
I want ALL packets to stay on the LAN.  I tried putting in a static route:

0.0.0.0
0.0.0.0
192.168.1.1

But it said "invalid destination IP".

The reason I want to do this is I am hooking up the WRT54G to the inside NIC card of an ISA2004 server, which is acting as the gateway to the internet.  

So I don't want to have a second gateway on the network and I don't want to have a second set of inside addresses.

Is there a way to make this work?

If it can't be done with the WRT54G, is there a wireless router I can buy that allows me to do this?

Thanks.
0
Comment
Question by:gateguard
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2
  • +1
8 Comments
 
LVL 6

Expert Comment

by:Nyah247
ID: 21788187
Have you tried to use the ISA server as your default gateway on your linksys.
0
 

Author Comment

by:gateguard
ID: 21788216
I'm not sure I understand.  The linksys has two configuration settings, one of the LAN the other for the WAN (or internet).

If I set up the LAN to have this address:
192.168.1.1
255.255.255.0
192.168.1.10

And the inside nic of the ISA server to have this address:
192.168.1.10
255.255.255.0
192.168.1.1

And have the wireless give out addresses in the range 192.168.1.100-150.

And then connect to the wireless with a laptop and try to go to the internet, I can't get to the internet.

It seems the wireless is trying to route the laptop's request out to its "internet" port, even though it's not plugged in.  Or anyway, it's failing.  (I can get to the internet from the ISA server.)

I'm not seeing what else I can do to route all packets on the wireless to 192.168.1.10.

0
 
LVL 6

Accepted Solution

by:
Nyah247 earned 167 total points
ID: 21788338
Ahh...  The ISA server should not have an internal gateway just one on the external interface.  You need to make sure that you setup the routing tables on ISA for internal.  Check this out for how to add routes:

http://forums.isaserver.org/m_2002050136/mpage_1/key_/tm.htm#2002050136

Check out the info about static routing with linksys here:
http://help.expedient.com/broadband/linksys_advanced_options.shtml
0
Flexible connectivity for any environment

The KE6900 series can extend and deploy computers with high definition displays across multiple stations in a variety of applications that suit any environment. Expand computer use to stations across multiple rooms with dynamic access.

 

Author Comment

by:gateguard
ID: 21788439
Thanks but I think I've got the ISA correctly set up.  If I take out the router, plug in a switch in its place, plug a PC into the switch and manually give it an ip address of 192.168.1.100, then that PC can get to the internet.

But if I remove the switch and put the wireless router back in the circuit, then I'm back to the problem of not being able to get to the internet from an inside computer.

The problem appears to be that I can't enter this static route on the WRT54G:
0.0.0.0
0.0.0.0
192.168.1.10

Sending all packets, whatever their destination, to the ISA server.

When I try to enter that route, I get "invalid destination IP address".  

Of course, in the "real" world, 0.0.0.0 is NOT an "invalid destination IP address".
0
 
LVL 44

Expert Comment

by:Darr247
ID: 21788770
Did you try plugging the ISA's inside NIC into one of the WRT54G's LAN ports, not its WAN/Internet port?
0
 
LVL 44

Assisted Solution

by:Darr247
Darr247 earned 167 total points
ID: 21788796
> If I set up the LAN to have this address:
> 192.168.1.1
> 255.255.255.0
> 192.168.1.10

Just for clarity, that's
LAN interface - 192.168.1.1
Subnet mask - 255.255.255.0
Gateway - 192.168.1.10

Correct?

If so, I'm not understanding

> And the inside nic of the ISA server to have this address:
> 192.168.1.10
> 255.255.255.0
> 192.168.1.1

i.e. The 'inside NIC' should NOT have a Gateway IP of 192.168.1.1


Assumption - You've also restricted the scope of any other DHCP server[s] to not hand out addresses from 100-150, and don't have any static IPs in that range, so you won't end up having devices with duplicate IPs 'inside'.
0
 
LVL 88

Assisted Solution

by:rindi
rindi earned 166 total points
ID: 21788820
Just give the router a static IP on your LAN's subnet. Make sure that IP isn't served by your DHCP server and disable the DHCP server of your router. Connect it to the LAN via it's LAN port. Don't use the WAN port.
0
 

Author Closing Comment

by:gateguard
ID: 31467325
Thanks for all your help.  One thing I added to the mix was turning on RIP on both the server RAS and the Linksys router.  That finally gave me the route I needed on the Linksys.
0

Featured Post

Manage your data center from practically anywhere

The KN8164V features HD resolution of 1920 x 1200, FIPS 140-2 with level 1 security standards and virtual media transmissions at twice the speed. Built for reliability, the KN series provides local console and remote over IP access, ensuring 24/7 availability to all servers.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In the modern office, employees tend to move around the workplace a lot more freely. Conferences, collaborative groups, flexible seating and working from home require a new level of mobility. Technology has not only changed the behavior and the expe…
This paper addresses the security of Sennheiser DECT Contact Center and Office (CC&O) headsets. It describes the DECT security chain comprised of “Pairing”, “Per Call Authentication” and “Encryption”, which are all part of the standard DECT protocol.
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar. Int…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…

707 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question