Solved

DHCP Leases As A Result of Workstation RRAS

Posted on 2011-09-16
6
477 Views
Last Modified: 2012-05-12
I have a client that has 50-60 workstations and a handful of servers.  Recently the DHCP pool exhausted IP's and it was discovered that multiple IP's were being used by RAS connections on servers and workstations.  To verify this, I'm able to delete the "Incoming Connections" adaptor on a workstation and the associated DHCP leases disappear on the server.  The next day, the "Incoming Connections" adaptor is back, and of course using IP leases.  I've looked through all GPO's and don't see anything that would do this, maybe I'm just missing it.  Is there anywhere else I should be looking to make sure the adaptors go away and stay away?

Thanks for any tips.
0
Comment
Question by:SafetyNet-TC
  • 4
  • 2
6 Comments
 
LVL 13

Expert Comment

by:5g6tdcv4
Comment Utility
lower the lease time on your DHCP server that is supplying IP's to RRAS
0
 

Author Comment

by:SafetyNet-TC
Comment Utility
I fail to see how that will solve the issue.  The IP's will just be renewed once they reach 50% of their expiry.  Additionally, that doesn't explain why the adaptors are created in the first place.
0
 
LVL 13

Expert Comment

by:5g6tdcv4
Comment Utility

Let me rephrase this:

What is the DHCP lease renewal on the server supplying IP's to RRAS?
Are these multiple IP's held by the workstation registered in DNS?
If you restart RRAS on the server are these leases dumped?
0
How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

 

Author Comment

by:SafetyNet-TC
Comment Utility
The DHCP lease renewal is 1 day.  No, the IP's do not get registered in DNS.  The RRAS service on the server is stopped and disabled for now.  Starting/stopping it has no affect on the leases.  It seems coincidental that a lot of the leases were created/expire in the 3-4AM range.  

Thanks for your response.


  DHCP RAS Examples
0
 

Accepted Solution

by:
SafetyNet-TC earned 0 total points
Comment Utility
I found the GPO causing this.  Not sure how I missed it the first two times I looked.  Thank you for your response, I really do appreciate it.
0
 

Author Closing Comment

by:SafetyNet-TC
Comment Utility
Self solved.
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

On a regular basis I get questions about slow RDP performance, RDP connection problems, strange errors and even BSOD, remote computers freezing or restarting after initiation of a remote session. In a lot of this cases the quick solutions made b…
Setting up a Microsoft WSUS update system is free relatively speaking if you have hard disk space and processor capacity.   However, WSUS can be a blessing and a curse. For example, there is nothing worse than approving updates and they just have…
This video discusses moving either the default database or any database to a new volume.
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

772 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

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now