XP and IP address for a TCP/IP connection

[azPNG]

I am running XP that is connected to a network that they setup the computers to renew their IP addresses everytime someone reboots their personal computer in their room. Well, mine has not changed IP addresses in overa month and I wondering if that is a bad thing (ie hackers, etc). When I have XP repair the connection, I get an error saying that it could not renew my IP address. I dont want to go to the IS on my campus and tell them this and make them made or anything, so is there a way to reset the IP address manually?? Like, unplugging the cable from the wall when the computer is off or something like that. But I am not sure this is a bad thing though. Someone shed some light on this thing. Also, sometime in the near future I want to setup my linux box to run DHCP and will need to set the IP address to my box and make it permanent. So keep that in mind when you provide feedback. LMK.

linman

 

[Saltin]

If I understand the situation correctly, you are connected with an XP box to a network that uses DHCP to assign TCP/IP information to clients.
Your TCP/IP is set up to obtain an address automatically.
You would use the ipconfig command to view/renew/release your TCP/IP Info
ipconfig /all (shows info)
ipconfig /release ( releases you lease)
ipconfig /renew ( renews your lease)

Keep in mind that when a client renews his lease with a DHCP server, 9 times out of 10 he is going to get the exact same IP addy back. It won't necessarlily change the info ( although it may), what it does do is renew your lease.

The fact that your IP addy appears to be static should not be a huge concern to you if you employ the proper security practises. Just play it smart.

 

[azPNG]

OK, I THINK I HAVE A HUGE PROBLEM. WHEN I WENT TO ipconfig /renew, it told me that it couldn't renew my ip address because the request was rejected. And when I tried to do a repair from the Network info panel, explorer restarted and the event viewer had this message for me about DHCP:

Event Type: Warning
Event Source: Dhcp
Event Category: None
Event ID: 1007
Date: 11/1/2001
Time: 4:10:20 PM
User: N/A
Computer: &*$#N
Description:
Your computer has automatically configured the IP address for the Network Card with network address 00A0CC39B4ED. The IP address being used is 169.254.178.28.

But when I run ipconfig /all, the same ip address is there and my lease runs out on the 15th of november, what is that?? Someone help me please.

linman

 

[toant103]

you have to release before you can renew. If you live in a dorm, DHCP will still assign you the same address. Well, in my case at Virginia Tech

 

[azPNG]

I typed in the release command and then the renew command. But what about the lease expiration on 11/15/01?? What is that??

linman

 

[Saltin]

You don't have to release before you renew. Renew is a release plus a new request.

Linman, when you do an IPCONFIG /all do you see info for more than one adapter?
I'm betting you do.
One will be 169.254.whatever.whatever. This is an APIPA address, it's what Windows defaults to when it is set up to obtain TCP/IP info from a DHCP server, but cant contact a DHCP server.

The other Adapter is likely configured with a normal Ip Address, right?

If this is the case, go into the properties of the adapter that is displaying the 169.254.whatever.whatever address.
Click on TCP/IP, and then click properties.
In the IP address box put in 10.0.0.1
In the subnet mask box put in 255.0.0.0

You wont get those warning messages anymore.

What you have isnt a major problem, it's just a minor annoyance.
I'm guessing you can surf your network just fine. Otherwise you would have mentioned that.

EDIT : Don't WORRY ABOUT THE LEASE EXPIRATION!! Your computer will renew it's lease automatically long before it ever has a chance to expire.If you want to know more read up about DHCP yourself.

 

[azPNG]

Thanks so very much for your help. I knew it wasnt a major domo of a prob.

linman