allow access from internal device to another internal device

[GameHoundsDev]

Hello, I have the following network layout: PFSense > Server > Proxmox > VM's

I am trying to allow internal VM to communicate with another VM for email servers and other servers via domain names.

Example: I have a VM for a forums, I want it to be able to use mail.domainname.com to communicate with the Email VM on the same proxmox/pfsense installation network

Does anyone have any tutorials or instructions on how to setup i think 1:1 nat to enable this? If its not 1:1 nat what is it? Sorry i am new to nat stuff.

Any help would be awesome, Thanks.

[GameHoundsDev]

@GameHoundsDev Sorry looking to setup Hairpinning i think.

[SteveITS]

@GameHoundsDev I think you want https://docs.netgate.com/pfsense/en/latest/recipes/port-forwards-from-local-networks.html

[GameHoundsDev]

@SteveITS Do you think splitdns will mess anything up if i set it up?

[Patch]

@GameHoundsDev said in allow access from internal device to another internal device:

I am trying to allow internal VM to communicate with another VM

You need both

1. Ethernet level 2 connection. This is most easily done by having them on the same LAN. Within Proxmox that is done most easily by having them on the same bridge (the virtual equivalent of a physical Ethernet switch)

2. IP routing (if you intend to use a WAN IP to access a local LAN device). Look at NAT reflection