DHCP with Hub

Hi everyone,

Please help.....
I tried to follow Microsoft's guide to setup in house private network. Base on the guide, I configured my Win2003 server as a DHCP server and Domain Controller, too. After those steps, I use one Linksys Hub to connect my DC and laptop, but my laptop couldn't join to my domain.
Is that because I can not use Hub to connect them or anything I have to do in laptop before it joins to the domain ?.... ...Thanks

 

No , a hub should work. If you have broadband I would strongleY suggest not using a hub. A router has features to keep ppl out of your network. Like SPI and NAT. With a hub anyone can surf in from the internet. Make sure that your notebook does not have a firewall, including XPs built in , actually turn off all firewalls. Also make sure that the notebook is pulling an ip from your dhcp server. Also make sure you are not using a cross over cable. Your dhcp server should also have a static ip address.

 

I expect the problem is that you haven't set the 2003 server as your DNS server in the DHCP scope. For you to log in the system needs to query active directory, and to do that it needs to identify parts of the active directory via their DNS names. Therefore, DNS on each client PC needs to point at the 2003 server (and not your ISP's DNS servers). The easiest way to do this is to add a DHCP scope option for DNS.

A hub cannot connect to the internet directly. There must either be a router or a network gateway device (a computer with a modem and ICS perhaps) connecting the network to the internet. Therefore, the nature of your internet connection is not a reason not to use a hub.

Again, I don't think I agree with this. Turn off your firewall temporarily to test if the firewall is the problem, but otherwise having a personal firewall is a good idea, even on a network secured at the boundary. You may have to configure the firewall to allow local network traffic.

 

Hi Reggie B,

I don't quite understand what that means. Could you please explain more clearly ? By the way, I also did install DNS in the 2003 server. Thank you for helping me.

 

Is this clear?

 

I think what reggie means is if you are using active directory, I think you have to go into the DHCP scope options, i could find it if it were in front of me. it will say 015 dns

anyway what does your ip dns and gateway ip's look like in ipconfig ?

 

I'm in the office now, so I can't run ipconfig command.
By the way, if I rename win2003 Server's name, after it became DC and had AD, DHCP runs on it. Will it cause this problem ?

 

SO you demoted the server from active directory to change the name and make it a DC ?
i guess it could , if you ping the name of any of your workstations do you get a reply or does it time out, if you can and you get a reply DNS is working. I once made a mistake and all my network was pointing to my ISPs DNS servers.

 

Could you give more details about "I can't run ipconfig command" ?

What happened?

 

you know I think we are going down the wrong path. I do not think DNS is an issue with releasing and renewing a dhcp lease or at least in this
you may also want to lokk at services in admin tools, to makeure the correct are configured

 

Yes. Both the active directory and DNS will be set up to work with your server name as it was when you set up those services. If you change the server name, Active Directory and DNS will have problems unless you reconfigure them to match the new server name.

 

ise2006, can you confirm that your laptop is getting an IP address from DHCP? Can you ping the server's IP address. If yes to both of these, the problem is most likely to be your DNS settings.

 

The main job DHCP does is hand out the basic IP address settings. These are IP address, and subnet mask. These are the fundimental settings that a PC needs to connect to a TCP/IP network.

However, DHCP can also issue other IP settings that are required for a PC to do things such as resolve computer names, and connect to the internet. These additional settings are the "scope options ". Here are some links concerning DHCP scope options:

http://technet2.microsoft.com/Windo...e400-4ab3-be4f-684c9cb9b3011033.mspx?mfr=true

http://www.computerperformance.co.uk/w2k3/services/DHCP_Configure.htm

 

Hi everyone,

First, I really wanna say "Thank you" for everyone who answers my questions,
since the first day I post question in this website. Those answers really not only help me to fix the problems, but also learn lots of new stuffs from them.

Second, I found the reason caused this problem. My laptop had wrong network card driver, after I installed the correct driver. The problem has beed fixde. I guess you guys will wanna kill me when you see this rite ....
Anyway, lots of thanks again

 

-LOL-

Very similar story I experienced last week.

My boss, yes, my boss told me he has three computers at home.One desktop wired to router in one room, another desktop and one laptop connecting router via wireless in another room. The router connect to modem then to internet.

Problem is every time he turned off the wired desktop. The other two computers can't go to internet. Then he turned on the wired desktop, for a while, the other two then worked fine with internet.

After he told me this story, I thought it was very weird and could not figure it out.


When I went his home and he showed me that. It was exactly what he told me. I stayed with two wireless computers and opened www.windowsbbs.com, it was fine. He went to the room which router was in and told me loudly he turned the desktop off. All of the sudden, I could not connect to windowsbbs.
Then I tried Yahoo, same thing.

Then I ping router, it was OK. But I can't ping yahoo.com or google.com.

Then he yelled at me that he turned the desktop on, then I found everything recovered.

Then I let my boss stayed with two wireless computers, I went to that room to turn on/off the desktop. No matter I turned on or turned off that computer, he always could connect to internet.

Who can tell what happened?

 

isn't that the way it always is.