I have a network routing problem that I need help with. We have a DEV network which is accessible on our LAN. I have made this accessible by installing MS routing and remote access services. I have created a virtual machine with 2 vm nics, one nic is connected to a virtual switch that has an up-link connected to the LAN network and one nic connected to an internal virtual switch with no physical up-link. Other VMs are connected to the internal switch and I can ping all these VMs from the LAN network. I have configured a routing rule on our SonicWall Pro 2040 device so that LAN clients know how to access the DEV VMs. Here are the network addresses
LAN Network - 10.2 /22
DEV Network - 172.16.10 /24
I have specified on the SonicWall Pro 2040 device that if you want to get to the 172.16.10 /24 network, then go to IP gateway of 10.2.4.100. This is the LAN IP address of the VM that has 2 nics and I use this as the gateway for the DEV network.
The problem is I cannot access the DEV network from outside the LAN. For example, I have a DMZ network, 172.16.0 /24 and I need to be able to access the DEV network from the DMZ network. I can ping machines on the LAN from the DMZ, but I cannot ping machines on the DEV network form the DMZ. I noticed that I cannot ping the10.2.4.100 address from the DMZ, but I can ping all other 10.2.4 addresses I chose. I also have site to site VPNs and I need remote sites to be able to access the DEV network so they can access DEV websites and the like.
I am only concerned at the moment about being able to ping IP addresses and not DNS names. Once I get the IP routing working, I will implement DNS for the DEV VMs. I have this working on the LAN at the moment, ie I can ping the DEV machine names and IP address from the LAN.
There are a few things that might come to mind that I have checked. I.e., firewall settings etc. But I think this is a routing issue rather than a firewall config issue. I think there must be something I need to configure on the SonicWall Pro 2040 device to tell machines that if you want to access the DEV network from the DMZ, then routing this way..
Any help would be appreciated