[HamWAN PSDR] Clarification on client node routing (this means your home / EOC /etc)

[Bart Kus]

There appears to be confusion about what client sites will look like.  I 
have had the Client Node Routing 
<https://www.hamwan.org/t/tiki-index.php?page=Client+Node+Routing&structure=HamWAN> 
page up for a while, but it did not contain a clear pictographic view, 
nor a thorough textual description.  I've now spent a little time to 
draw up a clear graphical representation of what to expect at your 
site.  Just hit up that page to see.

Your local router and wireless access point are staying, as is your 
Internet modem.  The newly added HamWAN microwave modem + router will 
simply plug into the LAN side of your network.

 From a routing perspective, the HamWAN modem will announce routes to 
your main router via RIP /most likely/ (see below).  These are subnets 
which are accessible via the microwave network and the packets for those 
subnets should be sent to the microwave modem. Default gateway /should/ 
(see below) stay as your main ISP.

If you have received subnet routing services from HamWAN (ie: you have 
your own subnet which is announced into the rest of the HamWAN network) 
then you'll configure your LAN devices with your subnet's IPs.

The open problems in this design are:

1) Asymmetric reply traffic when requests come into your HamWAN subnet 
from Internet IPs.  The reply packets will attempt to leave via your ISP 
since it's your default gateway.  We may have to do some policy routing 
on the main router to mitigate this, or multinet any network devices 
which want to talk out both networks.  To be engineered.

2) DNS queries need to work for at least the HamWAN.net domain despite a 
total Internet failure (of both your local ISP and HamWAN's Internet 
links).  DNS queries for regular Internet domains should be undisturbed 
during normal operation.

HamWAN should not request any control over user routers beyond the 
HamWAN modem + router device.  On the HamWAN modem + router device, 
users need to be free to define their own firewall rules and set other 
settings which do not conflict with HamWAN access policy.

--Bart

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