Server 2008 SBS shows multiple ip's assigned to server..

[knc]

Client has been having some issues on network... some quick books issues (error you are attempting to open a file stored on another compter etc), and if I look at the QB database manager it says the ip is 192.168.100.165 where the Server ip is 192.168.100.10. reran database manager it says network issues repair and rerun. Network card on server is Static 192.168.100.10.

I have never noticed a server.domain.local to have 5 or more entries on dhcp..

Wait just had a thought what happens when you vpn into the server (as some do) and use RDP they will get an ip to the Server something other than the static right?

The whole network was recently rebooted (sat)... It is hard to do much diagnostics as it is a CPA firm..

So if the vpn is pulling dhcp address' to be designated as Server and that IP address.

How would you reset QB database manager to see the correct server ip address? I have run it a few times today but it is failing..

 

[fencepost]

The server shouldn't be getting anything via DHCP, but unless the router is handing it out it should be acting as the DHCP server. If you go to a command prompt and do ipconfig /all what do you get?

Is this an issue with the server getting addresses (or having multiple static IPs on the same subnet assigned which is viable but only something to do if you know what you're doing - e.g. web server vhosting with multiple IPs), or is it WINS or DNS server with multiple hardcoded IP addresses associated with the name? I think Windows could allow you to do that in some versions....

In any case, the IPs assigned (and checked with ipconfig) are the bottom line for what will be functional. If there's bad DNS so \\quickbooksserver resolves to more than one IP and only one of those is correct, that's a separate issue.

If ipconfig shows that the server actually is receiving addresses via DHCP as well as its static one, what's the address of the DHCP server (shown by ipconfig /all) and why are multiple NICs active without static addresses on all of them?

 

[YeOldeStonecat]

How many NICs does the server have active? Ya know..some servers have multiple NICs....might have the second one active, perhaps for teaming...and the teaming broke.

Check in TCP/IP properties...Advanced....and see if (for some reason)...someone setup additional IP addresses on the NIC (since Windows can have additional IP addresses assigned to a NIC).

A VPN doesn't hand out alternate IPs for the server. A VPN just connects a remote user or a remote network to the network that this server is on. Internal resources are still their original IPs. A VPN doesn't change that.

If this network is using active directory (meaning the server is a domain controller)....the server should be doing DHCP, not a router.

In the servers TCP/IP settings...it should be using itself for DNS...and NOTHING ELSE. So if the server is 192.168.100.10 ...you'll see 255.255.255.0 for subnet, 192.168.100.1 for gateway (or whatever it is), and for DNS...you should see 192.168.100.10 and NO secondary DNS (unless there is another DC on the network....sometimes you see them added there depending on setup).

 

[knc]

Ipconfig /all shows static ip assigned to Server.. Second nic is disabled not bridged. Server is doing Dhcp. Yet still multiple ip's showing for Server..
So I know that a VPN tunnel has to hand out an ip address to a user right? If that user authenticates against the server and the ip is in the lease what computer should it be assigned to?

So if something is amiss what could it be? in a local scan I see about 5 or 6 entries showing ip's (in the pool) with Server.domain.local next to them... What could this be?

 

[YeOldeStonecat]

Do you know where to check for the additional/alternate IP addresses in TCP properties? I haven't seen an answer to that yet.

Also check for a bad or stale A-Record in DNSMGMT.MSC

Did you confirm if the server it using only itself as the DNS server in TCP/IP properties?

Is the server running the VPN server service (RRAS) and that's exposed to the internet? (horrible idea)...or is their VPN done by a VPN appliance like a router or dedicated VPN appliance (better way to do it).

 

[fencepost]

I think the cat's already got you, but if ipconfig/all doesn't show those additional addresses then you don't have an IP problem - you have a DNS problem.

When you run the network scan, it's asking the DNS server (presumably the Windows server you're having issues with) "hey, what's the name associated with this IP address?" If the DNS server was configured with or for some reason has held incorrect names for those addresses, it's giving back what it has rather than the actual name of the workstation that it handed out DHCP to.