Codemaster, first an apology for an error on the diagram of the network. It shows the internal router address as 192.168.0.1 when it should be 192.168.1.1.
Although I would like to follow the first option so that pfsense manages the ADSL connection, I do not think it will be possible although I am wiling to try as I can always revert. I have the login details for the ADSL but when I tried to allocate 192.168.1.1, it of course clashed with the existing router address. Furthermore, I do not know how to stop the box managing the connection as the command interface is limited on the box and I cannot see anything to disable the connection or to bridge the router (which I assume I would have to do?).
In the diagram you have changed the link of the router to go direct to the pfsense box but although I can do this in a virtual sense (i.e., through address mapping) I cannot do it in a physical sense as I need to use the four ethernet connections in the box for the IP phones and other items. Can you confirm that your revision is intended as a virtual not a physical break?
The IP phones and power link and connection to my office are essential and using this box is the only way for them to have a wired ethernet connection (i.e., not wifi or power link) without me rewiring the house which I do not want to do. Also, the power link has to be connected to the router (pfsense or SFR) not passed ver wifi as your diagram suggests. I would need to wire a second (physical) cable connection from the pfsense server back to the SFR router position with a switch if your diagram requires a physical break as shown and again, this would be very difficult to achieve.
What DNS settings should I use? At the moment, AirVPN is set up and working on the pfsense router and the DNS is set to its requirements and should remain so I assume those are the ones I should use.
I am not really understanding why you want to amend the wiring (if that is what you are proposing) as I thought this could be managed through subnet addressing which is really all I am now trying to understand and achieve. Whenever I set a separate subnet i cannot ping from one to the other and that is the bit I do not understand and there seems to be several ways to achieve it including iptables, NAT and routing, all of which seem to require adjusting the netmask?. This is the part I need to understand better and apply to my network
Also, having looked at your instructions (and tried it) I could not see how to enable the pfsense box to manage the WAN service dial up. Is it automatic? Does it require a reboot? Is there something else I need to do to start it if I use it?
I have manage to get it all working again on my single network but would still like to continue to try to set it up via subnets if possible.
Geoff