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DHCP IP addresses acquired by RAS

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Name: John D. Kulakowski
Date: March 11, 2003 at 08:37:48 Pacific
OS: Win2000 Server
CPU/Ram: PIII processor / 1 Gig ra
Comment:

I've got a Win 2000 server with the following setup:
. Active Directory
. DNS / WINS
. DHCP
. 8 ip addresses and no IP restrictions
. A gateway address is issued to clients acquiring a DHCP address
. Server DOES NOT GO ONTO THE WEB. (Gateway address not entered into TCP/IP configuration (By choice)).
. Routing and Remote Access (RAS) has not been setup on the server.
. An external modem has been setup and is known to the server. HOWEVER, no inbound or outbound calls monitoring has been setup.

I've got three (3) client PC's (WIN 2000 Pro) that acquire DHCP IP addresses from the domain server when logging into the domain. That is working great. And from the server MMC console under address leases for DHCP, it also shows the issued IP's to the clients.

But here is my problem.
In addition to listing the issued IP's for the clients from the server MMC DHCP address leases, the server it also show's two (2) additional clients that have acquired IP addresses also. The client names are 'specialcc' and the Unique ID for them is RAS. Again, I have not setup RAS on the server. These 'RAS' ip's DO NOT ping either.

No weired messages either that I can see from the event logs.

Comments or suggestions PLEASE.



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Response Number 1
Name: ITsupport
Date: March 12, 2003 at 06:41:18 Pacific
Reply:

Hi,

Did you check to see if the those are reserved IPs in the DHCP server.

Keep us updated please.
Good luck.


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Response Number 2
Name: John D. Kulakowski
Date: March 12, 2003 at 08:23:32 Pacific
Reply:

ITSupport:

Na, I checked and DHCP does not have any reserved IP's setup. DHCP has been setup with a range of 8 addresses to issue.

If I delete one of these DHCP issued IP addresses for RAS, the deleted IP, in a short time frame, will be issued again to same requester.

Also, issuing a PING command to the DHCP RAS address will fail.

One thought though, could a client PC that acquires a DHCP address ALSO be setup to acquire a RAS address from the server. (Even though RAS has not been setup on the server.

I'm scraping the bottom of the barrel on this one!!!!!!


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Response Number 3
Name: John D. Kulakowski
Date: March 18, 2003 at 08:40:51 Pacific
Reply:

Problem has finally been resolved!!!!!
Believe it or not, DHCP has been doing what it's designed to do (Issue IP addresses). However, everyone forgot about two NT 4.0 servers stuffed in the back part of the building of my place of business. (Third party vendors installed these several years ago for some project). And it is from these NT servers that RAS is installed. (No DHCP has been installed though).

How 'specialcc' was tracked goes like this:
. Win2000 server DHCP listed two RAS IP addresses as 'specialcc'.
. A ping command to resolve addresses to hostnames was issued.
Ex: ping -a specialcc
. The ping command came back with an address not part of the DHCP range but a successful ping at that.
. It was from the 'resolved' address listed that was figured to be these NT servers.



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