Hello again

I am sure some of you will remember me - I am the Irish fellah living in the boonies in italy, my brother and I set up (with great help from computing.net) a 5km link and repeater. As we have very little knowledge, this is on a par with little johnny actually landing his washing up liquid bottle rocket on the moon and returning it back to earth undamaged.

We now seek your help with what I hope will be much more simple project. We are hoping top add a server, where we can share storage space and run utorrent remotely from either my machine or my brothers.

Our set-up is as follows:
Our ISP router is linked to a tsunami antenna, broadcasting from "Base Station" (this is in a DSL covered area, broadcasting to my house). This signal is picked up in my house "Repeater Station", there it goes into a router and brings the signal to my computer and back to another tsunami antenna broadcasting down to my brothers house "Remote Site". We want to add a server in my house (Repeater Station) which I can access directly through the router in my house, and which my brother can access via the antenna.

Our current set up uses the following IP Addresses
Base Station Antenna - Where the ISP has their router
IP Address 172.19.55.3
Subnet Mask 255.255.255.0
Gateway 172.19.55.2

Repeater Station Antenna - where I receive the ISP Signal
IP Address 172.19.55.9
Subnet Mask 255.255.255.0
Gateway 172.19.55.3

ReTransmission Antenna - broadcasting from me to my brother
IP Address 172.20.55.3
Subnet Mask 255.255.255.0
Gateway 172.20.55.2

Antenna in my brothers house (Remote Site)
IP Address 172.20.55.9
Subnet Mask 255.255.255.248
Gateway 172.20.55.3

Router in my house - distributing to my brother via antenna I am directly wired into it - proposed server would be wired into this router too
IP Address 172.20.55.2
Subnet Mask 255.255.255.0
Gateway 172.19.55.2 (I think that is right listed as WAN Gateway??)

Could any kind soul tell us....

How do we set the server up so we can see it from my house (Repeater Station) and so that my brother can see it from his house (Remote Site). I am pretty sure that the problems we haven't been able to get around are:

1. The Subnet masks - my network in my house is 255.255.255.0, but the antenna my brother is using to access into my house is on 255.255.255.248

2. I think I need to set up some IP Hops in the router configuration but no idea what they need to be

3. A lot of other obvious things - without doubt

We have fiddled and searched and researched for a month now and still no joy, sorry if I have left anything out but if you need more info let me know and I'll post it asap.

Thanks in advance for all of your assistance!!

Roller