DHCP issuing 2 or more to clients/servers

I am experiencing a issue where my DHCP server is giving out 2 IP address per
PC. One IP is the Active Lease and the second IP is shown as RAS, which seems
to be given out anywhere from 15 seconds to ~3-4 minutes later. My servers
has had 10 of these RAS IP given out to it and my clients will only have 1
RAS IP (This does not include the Active IP that originally been given to the
PCs/Servers.) My problem is that it that eventually I run out of IP address
and have to start manually deleting those RAS IPs. Another thing I have
noticed is when I look at the Address Leases on the DHCP server, I see a
slightly different DNS name between the Active IP and the RAS IP.
Here is my configuration:
Class C IP range with 255 IP address.
Domain naming: PC.Sub-Domain.Domain.Com.
The 2 names in DHCP are:
Active IP given to: PC.Sub-Domain.Domain.Com.
RAS IP given to: PC. Domain.Com.
Any ideas on what is causing this?

"John Czahor" <(E-Mail Removed)> wrote in message
news:E8BD8D16-B08B-4B61-AF7A-(E-Mail Removed)...
> I am experiencing a issue where my DHCP server is giving out 2 IP address
> per
> PC. One IP is the Active Lease and the second IP is shown as RAS, which
> seems
> to be given out anywhere from 15 seconds to ~3-4 minutes later. My servers
> has had 10 of these RAS IP given out to it and my clients will only have 1
> RAS IP (This does not include the Active IP that originally been given to
> the
> PCs/Servers.) My problem is that it that eventually I run out of IP
> address
> and have to start manually deleting those RAS IPs. Another thing I have
> noticed is when I look at the Address Leases on the DHCP server, I see a
> slightly different DNS name between the Active IP and the RAS IP.
> Here is my configuration:
> Class C IP range with 255 IP address.
> Domain naming: PC.Sub-Domain.Domain.Com.
> The 2 names in DHCP are:
> Active IP given to: PC.Sub-Domain.Domain.Com.
> RAS IP given to: PC. Domain.Com.
> Any ideas on what is causing this?
>
Servers will lease 10 or more IPs from DHCP if they are configured as
remote access servers and do not have a static pool of addresses set up. If
they are workstations, they have probably been configured to allow incoming
connections.

I have check the servers and they have leased 10 ip for RAS. I looked at the
server and RAS has never been configured. What is the default and how do I
disable?

John

"Bill Grant" wrote:

>
>
> "John Czahor" <(E-Mail Removed)> wrote in message
> news:E8BD8D16-B08B-4B61-AF7A-(E-Mail Removed)...
> > I am experiencing a issue where my DHCP server is giving out 2 IP address
> > per
> > PC. One IP is the Active Lease and the second IP is shown as RAS, which
> > seems
> > to be given out anywhere from 15 seconds to ~3-4 minutes later. My servers
> > has had 10 of these RAS IP given out to it and my clients will only have 1
> > RAS IP (This does not include the Active IP that originally been given to
> > the
> > PCs/Servers.) My problem is that it that eventually I run out of IP
> > address
> > and have to start manually deleting those RAS IPs. Another thing I have
> > noticed is when I look at the Address Leases on the DHCP server, I see a
> > slightly different DNS name between the Active IP and the RAS IP.
> > Here is my configuration:
> > Class C IP range with 255 IP address.
> > Domain naming: PC.Sub-Domain.Domain.Com.
> > The 2 names in DHCP are:
> > Active IP given to: PC.Sub-Domain.Domain.Com.
> > RAS IP given to: PC. Domain.Com.
> > Any ideas on what is causing this?
> >
> Servers will lease 10 or more IPs from DHCP if they are configured as
> remote access servers and do not have a static pool of addresses set up. If
> they are workstations, they have probably been configured to allow incoming
> connections.
>
>
>
>

Also what are the implications of turning this off?

"Bill Grant" wrote:

>
>
> "John Czahor" <(E-Mail Removed)> wrote in message
> news:E8BD8D16-B08B-4B61-AF7A-(E-Mail Removed)...
> > I am experiencing a issue where my DHCP server is giving out 2 IP address
> > per
> > PC. One IP is the Active Lease and the second IP is shown as RAS, which
> > seems
> > to be given out anywhere from 15 seconds to ~3-4 minutes later. My servers
> > has had 10 of these RAS IP given out to it and my clients will only have 1
> > RAS IP (This does not include the Active IP that originally been given to
> > the
> > PCs/Servers.) My problem is that it that eventually I run out of IP
> > address
> > and have to start manually deleting those RAS IPs. Another thing I have
> > noticed is when I look at the Address Leases on the DHCP server, I see a
> > slightly different DNS name between the Active IP and the RAS IP.
> > Here is my configuration:
> > Class C IP range with 255 IP address.
> > Domain naming: PC.Sub-Domain.Domain.Com.
> > The 2 names in DHCP are:
> > Active IP given to: PC.Sub-Domain.Domain.Com.
> > RAS IP given to: PC. Domain.Com.
> > Any ideas on what is causing this?
> >
> Servers will lease 10 or more IPs from DHCP if they are configured as
> remote access servers and do not have a static pool of addresses set up. If
> they are workstations, they have probably been configured to allow incoming
> connections.
>
>
>
>

"John Czahor" <(E-Mail Removed)> wrote in message
news:B3CFB8E1-101C-4948-A541-(E-Mail Removed)...
> Also what are the implications of turning this off?
>
> "Bill Grant" wrote:
>
>>
>>
>> "John Czahor" <(E-Mail Removed)> wrote in message
>> news:E8BD8D16-B08B-4B61-AF7A-(E-Mail Removed)...
>> > I am experiencing a issue where my DHCP server is giving out 2 IP
>> > address
>> > per
>> > PC. One IP is the Active Lease and the second IP is shown as RAS, which
>> > seems
>> > to be given out anywhere from 15 seconds to ~3-4 minutes later. My
>> > servers
>> > has had 10 of these RAS IP given out to it and my clients will only
>> > have 1
>> > RAS IP (This does not include the Active IP that originally been given
>> > to
>> > the
>> > PCs/Servers.) My problem is that it that eventually I run out of IP
>> > address
>> > and have to start manually deleting those RAS IPs. Another thing I have
>> > noticed is when I look at the Address Leases on the DHCP server, I see
>> > a
>> > slightly different DNS name between the Active IP and the RAS IP.
>> > Here is my configuration:
>> > Class C IP range with 255 IP address.
>> > Domain naming: PC.Sub-Domain.Domain.Com.
>> > The 2 names in DHCP are:
>> > Active IP given to: PC.Sub-Domain.Domain.Com.
>> > RAS IP given to: PC. Domain.Com.
>> > Any ideas on what is causing this?
>> >
>> Servers will lease 10 or more IPs from DHCP if they are configured as
>> remote access servers and do not have a static pool of addresses set up.
>> If
>> they are workstations, they have probably been configured to allow
>> incoming
>> connections.
>>
>>
>>
>>

I can't think of any reason why this would happen if RRAS is not
configured as a remote access server.

By default, RRAS is not configured at all.

Just to let you know what I did, I found the RRAS service started and once I
turned it off, it released the xtra IPs. It looks like the default is the
RRAS service is active even if it is unconfigured and pull extra IP from the
DHCP server. The XP/Vista Workstations are setup the same way. I would
consider this to be a bad desing flaw as on a network you would have to
either remember to only allow half of pcs per number of IPs allocated to the
subnet or disable the RASS service on every single PC/server on the subnet.

John

"Bill Grant" wrote:

>
>
> "John Czahor" <(E-Mail Removed)> wrote in message
> news:B3CFB8E1-101C-4948-A541-(E-Mail Removed)...
> > Also what are the implications of turning this off?
> >
> > "Bill Grant" wrote:
> >
> >>
> >>
> >> "John Czahor" <(E-Mail Removed)> wrote in message
> >> news:E8BD8D16-B08B-4B61-AF7A-(E-Mail Removed)...
> >> > I am experiencing a issue where my DHCP server is giving out 2 IP
> >> > address
> >> > per
> >> > PC. One IP is the Active Lease and the second IP is shown as RAS, which
> >> > seems
> >> > to be given out anywhere from 15 seconds to ~3-4 minutes later. My
> >> > servers
> >> > has had 10 of these RAS IP given out to it and my clients will only
> >> > have 1
> >> > RAS IP (This does not include the Active IP that originally been given
> >> > to
> >> > the
> >> > PCs/Servers.) My problem is that it that eventually I run out of IP
> >> > address
> >> > and have to start manually deleting those RAS IPs. Another thing I have
> >> > noticed is when I look at the Address Leases on the DHCP server, I see
> >> > a
> >> > slightly different DNS name between the Active IP and the RAS IP.
> >> > Here is my configuration:
> >> > Class C IP range with 255 IP address.
> >> > Domain naming: PC.Sub-Domain.Domain.Com.
> >> > The 2 names in DHCP are:
> >> > Active IP given to: PC.Sub-Domain.Domain.Com.
> >> > RAS IP given to: PC. Domain.Com.
> >> > Any ideas on what is causing this?
> >> >
> >> Servers will lease 10 or more IPs from DHCP if they are configured as
> >> remote access servers and do not have a static pool of addresses set up.
> >> If
> >> they are workstations, they have probably been configured to allow
> >> incoming
> >> connections.
> >>
> >>
> >>
> >>
>
> I can't think of any reason why this would happen if RRAS is not
> configured as a remote access server.
>
> By default, RRAS is not configured at all.
>
>

"John Czahor" <(E-Mail Removed)> wrote in message
news:692AB0EA-085F-413F-8DC5-(E-Mail Removed)...
> Just to let you know what I did, I found the RRAS service started and once
> I
> turned it off, it released the xtra IPs. It looks like the default is the
> RRAS service is active even if it is unconfigured and pull extra IP from
> the
> DHCP server. The XP/Vista Workstations are setup the same way. I would
> consider this to be a bad desing flaw as on a network you would have to
> either remember to only allow half of pcs per number of IPs allocated to
> the
> subnet or disable the RASS service on every single PC/server on the
> subnet.
>
> John

By default, the service is disabled, unless it is configured using the RRAS
console. So IMHO, I believe it was configured at one point, but for some
reason when it was turned off using the console, the service continued to
come up automatically, otherwise this wouldn't have occured in a default
installation.

By default, yes, when RRAS is configured and started, it will pull blocks of
10 IPs at a time as needed for RRAS clients.

If you are saying that you are finding your machines to have RRAS service
set to automatic and are started, is there some sort of GPO or other policy
or app that is installed that is turning it on?

Are your machines installed based on an image that the RRAS service was set
to automatic?

Like I said, by default it is disabled on servers and desktop operating
systems with fresh installs.

--
Ace

This posting is provided "AS-IS" with no warranties or guarantees and
confers no rights.

Please reply back to the newsgroup/forum to benefit from collaboration among
responding engineers, as well as to help others benefit from your
resolution.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSA Messaging, MCT
Microsoft Certified Trainer
(E-Mail Removed)
http://twitter.com/acefekay

For urgent issues, you may want to contact Microsoft PSS directly. Please
check http://support.microsoft.com for regional support phone numbers.

All of these PCs and servers I setup from scratch. I don't even look at RRAS
when I setup the OS. Where is that located in there? I just check the server
and pc that I have turned it off and had set it to disable and discovered it
to be back on again.You were saying that it could be in group policy. Where
is that located in there?

John

"Ace Fekay [Microsoft Certified Trainer]" wrote:

> "John Czahor" <(E-Mail Removed)> wrote in message
> news:692AB0EA-085F-413F-8DC5-(E-Mail Removed)...
> > Just to let you know what I did, I found the RRAS service started and once
> > I
> > turned it off, it released the xtra IPs. It looks like the default is the
> > RRAS service is active even if it is unconfigured and pull extra IP from
> > the
> > DHCP server. The XP/Vista Workstations are setup the same way. I would
> > consider this to be a bad desing flaw as on a network you would have to
> > either remember to only allow half of pcs per number of IPs allocated to
> > the
> > subnet or disable the RASS service on every single PC/server on the
> > subnet.
> >
> > John
>
> By default, the service is disabled, unless it is configured using the RRAS
> console. So IMHO, I believe it was configured at one point, but for some
> reason when it was turned off using the console, the service continued to
> come up automatically, otherwise this wouldn't have occured in a default
> installation.
>
> By default, yes, when RRAS is configured and started, it will pull blocks of
> 10 IPs at a time as needed for RRAS clients.
>
> If you are saying that you are finding your machines to have RRAS service
> set to automatic and are started, is there some sort of GPO or other policy
> or app that is installed that is turning it on?
>
> Are your machines installed based on an image that the RRAS service was set
> to automatic?
>
> Like I said, by default it is disabled on servers and desktop operating
> systems with fresh installs.
>
> --
> Ace
>
> This posting is provided "AS-IS" with no warranties or guarantees and
> confers no rights.
>
> Please reply back to the newsgroup/forum to benefit from collaboration among
> responding engineers, as well as to help others benefit from your
> resolution.
>
> Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSA Messaging, MCT
> Microsoft Certified Trainer
> (E-Mail Removed)
> http://twitter.com/acefekay
>
> For urgent issues, you may want to contact Microsoft PSS directly. Please
> check http://support.microsoft.com for regional support phone numbers.
>
>
>
>
>
>

Never mind I found the location in GP and disabled it.

john

"Ace Fekay [Microsoft Certified Trainer]" wrote:

> "John Czahor" <(E-Mail Removed)> wrote in message
> news:692AB0EA-085F-413F-8DC5-(E-Mail Removed)...
> > Just to let you know what I did, I found the RRAS service started and once
> > I
> > turned it off, it released the xtra IPs. It looks like the default is the
> > RRAS service is active even if it is unconfigured and pull extra IP from
> > the
> > DHCP server. The XP/Vista Workstations are setup the same way. I would
> > consider this to be a bad desing flaw as on a network you would have to
> > either remember to only allow half of pcs per number of IPs allocated to
> > the
> > subnet or disable the RASS service on every single PC/server on the
> > subnet.
> >
> > John
>
> By default, the service is disabled, unless it is configured using the RRAS
> console. So IMHO, I believe it was configured at one point, but for some
> reason when it was turned off using the console, the service continued to
> come up automatically, otherwise this wouldn't have occured in a default
> installation.
>
> By default, yes, when RRAS is configured and started, it will pull blocks of
> 10 IPs at a time as needed for RRAS clients.
>
> If you are saying that you are finding your machines to have RRAS service
> set to automatic and are started, is there some sort of GPO or other policy
> or app that is installed that is turning it on?
>
> Are your machines installed based on an image that the RRAS service was set
> to automatic?
>
> Like I said, by default it is disabled on servers and desktop operating
> systems with fresh installs.
>
> --
> Ace
>
> This posting is provided "AS-IS" with no warranties or guarantees and
> confers no rights.
>
> Please reply back to the newsgroup/forum to benefit from collaboration among
> responding engineers, as well as to help others benefit from your
> resolution.
>
> Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSA Messaging, MCT
> Microsoft Certified Trainer
> (E-Mail Removed)
> http://twitter.com/acefekay
>
> For urgent issues, you may want to contact Microsoft PSS directly. Please
> check http://support.microsoft.com for regional support phone numbers.
>
>
>
>
>
>

"John Czahor" <(E-Mail Removed)> wrote in message
news:197A8312-4BB2-4114-829F-(E-Mail Removed)...
> Never mind I found the location in GP and disabled it.
>
> john


There you go! Glad you found it and resolved it.

Cheers!

Ace