RRAS, IAS and Microsoft VPN server, why are RAS reservations in DHCP server?

Posted on 2007-10-17
Medium Priority
Last Modified: 2010-08-05
here is the scenario, i have a windows 2003 server with 2 nics.
I installed RRAS and IAS on this machine.
Both machines have internal(but different) IP's on the nics on nicA and on nicB(this is the one configured as the external ip on the vpn server because i am doing natting with my firewall to this ip)
I have configured the IAS to use active directory with its authentication and a the vpn(nic-B) as a radius client

my question is on my dhcp server which is a completely different server(its on my domain controller) i am seeing a bunch of IP addresses being taken up by the unique id "RAS", the name is the name of the server for all the ip's. why is this happening?
please advise.
thank you
Question by:yalemort
1 Comment

Accepted Solution

Brugh earned 2000 total points
ID: 20093602
Because your installed RRAS.  RAS is a Windows function that hands out IP addresses to remote users when they connect.  In order to NOT duplicate IP addresses, RAS will update the DHCP with those addresses and basically "reserve" them so that they don't get issued out by normal DHCP requests.


Featured Post

SMB Security Just Got a Layer Stronger

WatchGuard acquires Percipient Networks to extend protection to the DNS layer, further increasing the value of Total Security Suite.  Learn more about what this means for you and how you can improve your security with WatchGuard today!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Trying to figure out group policy inheritance and which settings apply where can be a chore.  Here's a very simple summary I've written which might help.  Keep in mind, this is just a high-level conceptual overview where I try to avoid getting bogge…
If you use NetMotion Mobility on your PC and plan to upgrade to Windows 10, it may not work unless you take these steps.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…

612 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