Hello Bryan,
thanks for your answer. I checked and answered your questions below. I know,
I had a mistake in the beginning, I deaktivated the Router-DHCP while
installing the SBS, but somehow it was aktivated for a few minutes later.
The DHCP from my SBS is working, no doubt, but: I can not configure it ;-((
Jacob.
----- Original Message -----
From: "Brian Cryer" <>
Newsgroups: microsoft.public.windows.server.sbs
Sent: Tuesday, August 30, 2011 6:22 PM
Subject: Re: DHCP and Dyndns Problems
> "Jacob van Iwaarden" <> wrote in message
> news:4e5a3975$0$30113$ e...
>> Hello NG, I am pretty new in this scene, but I think I have some
>> interesting problems. One of them is this:
>> In the company we have anSBS2008 installed, a Router for Internet-Access,
>> it works all fine.
>>
>> I have the same configuration at home with a second Licence, this one
>> works fine too.
>> Both Servers are named: SBS-1.
>>
>> Then I configured Dyndns on the Router. We can reach our system (and the
>> network) using MyDom1.dyndns.org.
>> The same was done at home with MyDom2.DynDNS.org.
>>
>> So far so good, I wanted to check the DHCP-Server and now itīs getting
>> weird:
>> On my server at home, I have in the DHCP an entry: SBS-1.MyDom2.local, as
>> it should be. I can configure the Network and the leases.
>> In the Company this entry is called: MyDom1.dyndns.org and it is marked
>> red. The server Never was told, there is a Dyndns entry somewhere. This
>> was managed by the router! (In this case a Fritz!box, at Home I use a
>> Draytek)
>> I can delete the entry and connect to an authorized server,
>> sbs-1.MyDom2.local. This one is then listed, but in the moment I select
>> it, I get it red marked again...
>> If I try searching, I enter the name, SBS-1, check the name, it is named
>> correct. If I confirm, I get an entry in the DHCP-Console named
>> MyDom1.dyndns.org!!! If I selct it, it is marked red again.
>>
>> The system works, but I cannot change anything in the configuration.
>> Thatīs worrying me.
>>
>> Anyvbody who has an Idea? Can I deinstall and reinstall the DHCP wiith no
>> problems/ danger?
>> Any other Solution?
>>
>> Thanks in advance,
>> Jacob
>
> DynDns and DHCP should be completly unrelated.
>
> My suspision is that either:
>
> 1. Your router is acting as a DHCP server. The only reason I can think of
> for why the DHCP server won't start is if it detects another one.
My router was activateed as a DHCP-Server for a short while ;-(
I found out very fast, that there was a problem in the network and
deaktivated the Router-DHCP.
> 2. You are VPN'ing to this server to configure it. (I can't think why else
> DynDns is a factor.) Ordinarily this should be fine, but if you are
> VPN'ing from a network with an SBS server I wonder whether that might be
> causing you a problem.
Yea, I connect the server via VPN, but:
The adress for external is a dyndns-Address, which reaches the router. This
will pass the packets (based on the Ports used) through to the server, using
an internal IP-Adress. So the server will get a VPN-Tunnel to extern but the
IP-Adress he sees, is in his own network. (I checked)
> Could you check also that the IP address of your server is static - it
> isn't trying to assign an IP address using a DHCP server - this also might
> account for where the DynDns name is coming from but I'm just speculating.
> At the same time check that your DNS server is your SBS box and not the
> router.
Yes the server has got a static IP-Adress. And it was not changed at all.
> --
> Brian Cryer
> http://www.cryer.co.uk/brian
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