[AccessD] OT: Public and private network

jwcolby jwcolby at colbyconsulting.com
Sat Jun 11 13:22:05 CDT 2011


Neat idea and long overdue.  It is kind of difficult to discover exactly what it does, and 
apparently it doesn't do port forwarding correctly or something.

AFAICT a pair of routers in series will do what I need.

John W. Colby
www.ColbyConsulting.com

On 6/11/2011 9:51 AM, Tina Norris Fields wrote:
> Dear John,
>
> I see that you do not have any response on this, yet. I am by far NOT an expert in networking. But,
> when I recently reconstructed my own wireless broadband network, I added a guest network. It was
> quite simple to do, and it gave me the option of allowing or not allowing the guest network to
> access my local network. I chose to not allow guest access. My new routers are NetGear WNDR3400's
> and their software guided me through the process.
>
> I hope this helps. I have received so much help from you over the years, it will delight me to be
> able to give back a little.
>
> T
>
> On 6/8/2011 9:09 AM, jwcolby wrote:
>> A church that I do pro bono for has an internet connection which currently is sent through a
>> wireless router and shared in a simple workgroup lan. They want to add a new lan segment which is
>> "public", i.e. can be used by classes they give, to get to the internet, but they do not want
>> those people to see or have access to the existing LAN / computers.
>>
>> Am I correct that I can simply take two routers:
>>
>> RouterA attached to the cable modem.
>> RouterA is the DHCP Server.
>> RouterA is the "Public" network and its wireless interface serves that part of the church.
>>
>> RouterB connects its WAN to one of the LAN ports.
>> RouterB DHCP Server is turned off
>> RouterB is the private network and it's wireless interface serves that part of the church.
>>
>> The cable modem location is several hundred feet from the church where the public network will be
>> located. I will use a Cantenna to beam the wireless down to the church.
>>
>> http://www.cantenna.com/
>>
>> I am considering using a bridge to pick up the signal from the Cantenna and retransmit the signal
>> on another wifi channel.
>>
>> My parts list
>>
>> 1 existing router (wrt54g IIRC)
>> 2 new router (probably a wrt54g as well)
>> 1 (or possibly 2) Cantenna
>>
>> I am going to spend some time working with the system to see if I need a bridge at the far end or
>> whether the cantenna will allow systems at the far end to see the internet directly through the
>> cantenna. I have no idea what the beam diameter will be a few hundred yards away, but I suspect
>> that a wireless bridge and another wireless router at the far end will be required.
>>
>> If anyone has done this kind of system and has words of wisdom please speak up. I will be setting
>> this up soon.
>>
>>



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