VM Server and DMZ

I have a server i just configured into a VM called Mars1.  The server itself that houses the Mars1 vm image has 2 nic cards, one plugged into my internal LAN and the other into my DMZ.  the physical server i converted Mars1 from which is called Mars is currently on the DMZ and working fine.  I was wondering if i can get some help in trying to get the DMZ NIC working for Mars1.  I have configured both NICs, one for internal and one for DMZ access.  i know it doesnt work on the DMZ because when i disable the internal NIC on Mars1, i cant reach the internet nor ping any of the other servers on the DMZ.  Are there any special configuration or issues that cant have Mars1 have access to the dmz?  could i have some assistance in trying to get this up and running.
rswaniganAsked:
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vmwarun - ArunCommented:
Just to confirm, are you using VMware Server or VMware ESX ?

Have you checked the IP Config in both the NICs ?
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johnpittCommented:
You did assign the VM a different IP than the Physical one didn't you? Or do you turn off the physical one before you bring up your VM?
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rswaniganAuthor Commented:
i am using vm server esxi 3.5
yeah, i have checked both nics and i have even compared to other servers that are on the dmz.  

I renamed the vm server different then what the physical one was that i converted from.  i then gave it another static ip address.
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nappy_dThere are a 1000 ways to skin the technology cat.Commented:
Do you have a gateway IP set on your DMZ nic?  It seems that what you have described is that your internal nic may have a gw set. I would set the gw on the dmz and remove it from your intenal nic.
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johnpittCommented:
If Mars1 is Windows, do a "route print" from a command while both nics are enabled and plugged in. It may reveal something.
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davismisbehavisCommented:
You mention two NICS,  is that two NICS into the ESX box or are you talking about 2 NICS on the Virtual Machine called MARS1

How has the DMZ NIC connection been configured here,  is it a network switch VLAN configuration or are you using VLAN tagging in the virtual switch and a trunk connection from the network switch.  i.e. what makes it a DMZ.

Are you able to provide us with a screenshot of the virtual networking configuration screen in the VI Client so we can

www.virtualpro.co.uk 
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rswaniganAuthor Commented:
I do have both gateway's set on both NIC cards yes.  I also remember that when i tried to go and save the configuration after the last NIC, it kicked off an error saying something like there cold be a confliction if saved that way.

2 NICS on the virtual machine Mars1 and Mars2.  its a network switch confiured for VLAN only.

Ok, let me ask you this question...can you tell me the correct ways to configure both an internal NIC and a DMZ NIC on my server meaning for the internal, would i configure it with everything meaning the IP, Subnet, Gateway and both DNS's and for the DMZ just the IP and subnet.  What my issue seems to be here is the communication of both cards talking between my LAN & WAN networks.
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nappy_dThere are a 1000 ways to skin the technology cat.Commented:
You should only have a gateway set on your DMZ NIC.
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rswaniganAuthor Commented:
Ok, so its suppose to be like this then on that server:

For Internal NIC:
IP
Subnet
DNS

For DMZ NIC:
IP
Subnet
Gateway

This correct?
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nappy_dThere are a 1000 ways to skin the technology cat.Commented:
yes that is correct
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rswaniganAuthor Commented:
If i configure the NIC's that way, do i also have to have it written in my firewall to allow in and out or as long as the physical ESXi server is connected to the DMZ, it should work?  Do i need to reboot after i make my changes on the server or could i disable the iunbternal and see if the internet will still come up?
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nappy_dThere are a 1000 ways to skin the technology cat.Commented:
I am a little bit confused as to how the points were award here....
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