Peer-peer windows connection

April 6, 2009 at 16:43:32
Specs: Windows XP SP3
I have two Windows XP desktops I want to connect together for simple file sharing, but with one serving as the internet access gateway for the other. I have a wireless network on the "main" PC so it has internet access. Then it has a separate NIC card with cat6 cable to the other PC, which also has a similar NIC card. The two PCs are cabled into a Netgear 8-port gigabit switch. I can't seem to get any connection between the two PCs to work. Windows tells me "limited or no connectivity" on this cabled netwrok. The wireless works fine for the "main" PC's access to the internet. When I do an "ipconfig" on the "main" PC, the DNS suffix for the NIC and the default gateway are both blank. The same is true for the other PC. I'm a network dummy. What can I do to fix the problem?

See More: Peer-peer windows connection

Report •

April 6, 2009 at 17:01:27
I think you are getting a switching loop.

So you have a wireless router which is connected to one pc , you then have an 8-port which which is connected to a LAN port on the router?

How many port does the router have??

Report •

April 6, 2009 at 18:03:01
Actually, my "main" PC does not have the wireless router, but only has a wireless NIC. The PC that has the wireless router or gateway (it's an ActionTec wireless modem) is elsewhere in the home and is not mine. I'm just connecting to that existing wireless network with my "main" PC so I can get out to the internet.

Then, my "main" PC also has another, cable-type (non-wireless) NIC, and so does my second PC, and my two PCs are both cabled to the Netgear 8-port switch - nothing else is cabled to that switch.

So, I'm hoping to be able to get my 2 PCs to see each other, and for my second PC to get internet access via my "main" PC.

So, from the standpoint of my "main" PC, I have two networks. One wireless and one local cabled network (the one that uses the Netgear switch). But that second network between my two PCs is the one that says no connectivity is present.

Do I need more than a simple ethernet switch between my 2 PCs? Do I need a "gateway" or a router of some kind to manage traffic between them? Can my "main" PC be configured to be a gateway or router without damaging the connectivity on its wireless NIC with the existing wireless network in the rest of the home?

Report •

April 7, 2009 at 01:51:10
That should work ok. To do it manually something like this

1) On the "main" pc go to network connections open the wired adapter connection(NIC), go to properties, advanaced, and check "allow other network user to connect trhough this computer internet connection".
2) Again on the "main", the wireless router will give the wireless NIC an IP, find out what that IP is, maybe
2) Go to network connections again and open the wired adapter connection in properties. Set the IP, in internet protocol tcp/ip to IF the wireless NIC IP on "main" was say just keep the "0" number column the same.
3) On the other PC with 1 x wired NIC, go to internet protocol (tcp/ip) settings and set the ip to say but this time also set the gateway ip to the "main" pcs wired ip i.e You dont need to set the gateway ip on the "main" pc just the second pc.

Report •

Related Solutions

April 7, 2009 at 08:35:18
Thanks much - I'll try this today - can you also tell me, though, how to set the IPs to the desired values - do I use ipconfig to do that?

Report •

April 7, 2009 at 11:31:44
Ok - I've now got the LAN working between my two PCs, and the wireless access to the internet still works from my "main" PC, but I can't get internet access from the second PC. Here's the current config:

Main PC Wireless:
Assigned automatically by DHCP

Main PC Wired:
Assigned manually

Main PC Wired LAN allows other computers to connect to internet thru its connection

2nd PC wired:
Assigned manually
Default gateway:
DNS server addresses are blank
LMHOSTS lookup enabled
NetBios is default

Any suggestions on how to get the 2nd PC to be able to see the internet?

Thanks for all your help!

Report •

April 7, 2009 at 11:56:55
You can't have main wireless nic and main 2nd pc nic both being in the same subnet.

You can't use ICS since the wireless router is giving you 192.168.0.x for ip. ICS defaults to 192.168.0.x for the second nic which would put you back where you are with no 2nd pc internet access.

setup as follows;

main host pc
wireless nic
wireless nic gateway [assumed]

main host pc
wired nic
no gateway entry

2nd pc
wired nic

On the main host pc BRIDGE the two nics together. Right mouse clieck on the wireless nic and bridge connections should be a choice.

Report •

April 7, 2009 at 13:23:58
Well, I set up the bridge exactly the way you suggested, with the wired NICs on the .1 subnet instead of on the same subnet as the wired NIC, but the bridge kills all network connections, both wired and wireless.

So I deleted the bridge, but left the wired NICs on their own subnet. So the only thing that still doesn't work is internet access from the 2nd PC.

Maybe it would be best to simply get a USB wireless NIC adapter for the 2nd PC and let it connect directly to the wireless network instead of trying to get it to connect thru my "main" PC.

I think that might be best. What do you suggest?

Report •

April 7, 2009 at 17:53:38
what do you mean by "the bridge kills all connections"

you mean you no longer had internet access from the host [pc1 connected to the internet]?

Have you disengaged the windows firewall on pc1?

Put things back as recommended.
Ping the ip of the wireless nic. Are you successful?

Report •

April 7, 2009 at 18:08:55
Yes, all network connections became inoperable, but no error messages from Windows.

Windows firewall is enabled on both PCs and both wireless and wired networks. I will try disabling it on pc1, put things back as you recommended, and let you know what happens.

Yep - disabling Windows firewall on pc1 did the trick. It all works good now. I also had a problem with McAfee blocking the network, so I had to place them as "trusted" within McAfee. Thanks for all your help!!!

Report •

Ask Question