Hello friends,
I am trying to reliably create a point to point connection between two computers which may not have a 1 to 1 public IP.
In order to do this, I need to set the destination MAC address and destination port number.
For example, if there is an IP 192.168.0.2 and another IP 192.168.0.3 , and if a connection is made on the same local port eg 10,000, after NAT through a firewall, the source IP Address in a many to 1 system will need to be DNATed using some other information.
In bound packets to both 192.168.0.2 and 192.168.0.3 prior to DNAT will show the firewall's IP - eg 99.99.99.99.
However, reviewing the Etherreal output of the packet - the MAC address is specific to the adapter - so the router or firewall must be using the MAC Address to correctly route the inbound packets and DNAT to the local IP.
So the question is : is the firewall using the destination MAC address to DNAT and route ?