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Guest OS getting IP from unknown DHCP Server

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First of all, hello!
My first post, i hope i am asking my quastion well heh.

 

So guys...
Im currently a IT student, at my school i am currently working with virtualization.
Before our teacher gave us the jobs that we had to do inside the VM we could choose either VMWare or VirtualBox


I used VMWare obviously, since i used it before it was was excelent!

im gonna write my problem but before i do that please keep in mind that i MUST be using NAT, im not allowed to use Bridge (believe me if i was allowed to use this i would not be here today)

But now my problem...
one of the Guest systems is getting a IP adress from a unknown DHCP Server. while i really thought it would get it from anohter guest server that is actually running the DHCP Server (Windows server 2012)

the IP that the guest client gets is the following
10.0.0.1
the default gateway is 192.168.30.1 (odd)

when i lookup in arp -a  i see that its linked with 00-AC-E5-14-E2-D0 (not the MAC of the guest itself, also not the MAC of the windows 2012 Server guest, and not my host either! so what the hell right?)

 

Some  information about the virutal network:

  • Once again, using NAT
  • DHCP is DISABLED
  • Connect a host virtual adapter to this network is checked
  • Subnet is 192.168.140.0, mask 255.255.255.0
  • Gateway is 192.168.140.2
  • Auto-get DNS Servers from host

Some server information:

  • IP is set as 192.168.140.100
    The Scope is set as 192.168.140.110 to 192.168.140.120
  • Default gateway is setup was 192.168.140.2
  • subnet 255.255.255.0
  • Primary DNS set to localhost
  • Secondary DNS set to 192.168.140.2
  • Internet access WORKS!

 

And here is my setup

2 Systems running

  • Windows Server 2012
  • Windows 10

Windows Server 2012

  • Running DHCP Server
  • Running DNS Server
  • Running ADDS
  • And some few extra features..

Windows 10

  • Noting installed yet
  • NIC Configured as default so it would try to get a IP from a DHCP server

 

Things i already have done

  • Disable the build-in DHCP Server within vmware and configure the Win Server with a correct static IP adress (works, internet access granted!)
  • Remove and re-add a new Network adapter
  • Upgrade from VMware 11 to 12
  • restarting Win 10 client, not working...
  • ipconfig /release and renew, also flushhing dns but i dont think i should be worry about DNS at this moment.

And some things that i noticed...

  • While running the DHCP Server on Server 2012 i noitced that TWO Securenat-xxxx clients were connected to the Server. (not sure if this is OK or not)
  • Sometimes it DOES works. but very rare and it doesnt work long enough
  • i believe restarting my HOST system will temporally fix this issue rather then restarting VMware guest systems...
  • Shutting down the DHCP Server on Windows server 2012 still allowes the Windows 10 guest to grab a IP aderss from somewhere!


Please help im really lost i dont know where to look anymore

After reading this quastions and if your confused too, i can give you accsess to the server just to look for yourself.

 

Thank you all for your response already,

 

Best regards

 

EDIT:
The guest has still Internet access by the way! but not via the Server 2012

i can ping that 192.168.30.1 from the guest client

but Server 2012 cannot ping that IP.

Also, the Guest client can ping the server but the server cannot ping him back (10.0.0.1 - Remember that i did not configure this)
EDIT #2

i just had to forward some ports within VMWare workstation, after i was done i applied and closed the vmware and restarted my host system.
After i attempted to boot into my windows client there was a red cross witch makes me believe that there is something wrong with VMWare

This also worked before!


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