Router:Linux - Debian - With L2TP Fallback: Difference between revisions

There are two options for IPv4 ranges. You can either assign a /29 to the handoff interface between the Linux router and the firewall. This would be the "Proper" way to do things, but would waste 3 public IP addresses, which are a precious resource in this day and age. I have instead used RFC1918 private address space as a handoff between the devices, and routed the public /29 block to the private IP of the firewall. The firewall can then be configured with these as virtual addresses, with all 8 addresses kept as usable addresses.

 

[[File:Debian L2TP Routing Setup IPv4.jpg|none|frame|IPv4 routing setup used in this example]]

[[File:Debian L2TP Routing Setup IPv6.jpg|none|frame|IPv6 routing setup used in this example]]