ppp server: arp proxy things? (re-post)

[Zhang Weiwu]

Hello. I posted this questions three days ago; I didn't get a reply yet. I 
have been fighting the problem today whole day without any luck, and the 
more I dig into the problem, the more I feel it should not be a very rare 
problem. Perhaps I didn't descirbe my problem clear enough in my last 
email, or did I have etiquette problem? Should I provide more specific 
information? 

Now to what I can understand, the biggest problem is the proxy arp. I can 
have bc compuerts connects to bs, but I cannot let them access other hosts 
on the LAN. A true example: bc1 is 10.0.0.11, on the other side of the 
tunnel is 10.0.0.10 (bs). bs also have a NIC address 10.0.0.9. bc1 ping 
10.0.0.10 and 10.0.0.9 just fine, ping other hosts gets time out.

I do have "enable proxy" (and "enable proxyall") in my ppp.conf; I do have 
gateway_enable="yes" in my rc.conf. So it is a simple question: ppp 
connects okay, but  proxy arp is not working, what should I do? 

=== Here is my last post ===

Hello. I think this problem really go out of my English language ability, 
I'm trying my best to explain it:

Now I just built a bluetooth based LAN access server, that is to run 
several serial connection over bluetooth, so you can think they are many 
simple serial connection, and ppp runs over the connections through tun. 
The network is like this:

     [gateway/firewall: 10.0.0.138] --- [many hosts, 10.0.0.1 - 10.0.0.8]
             |
             |     +-- [10.0.0.10 <-tun-> 10.0.0.11] -- [bc1]
     [bs: 10.0.0.9]+-- [10.0.0.12 <-tun-> 10.0.0.13] -- [bc2]
                   +-- [10.0.0.14 <-tun-> 10.0.0.15] -- [bc3]

10.0.0.138 is also the DHCP/DNS server. bs means bluetooth LAN access 
server, bc1 is a notebook computer with bluetooth, bc2 is another, and bc3 
yet another.

I have pppd running on bs. I'm pretty dumb with ppp, to get it working I 
setup three ppp lables in /etc/ppp/ppp.conf, holding the address from 
10.0.0.10 to 10.0.0.15.

Currently bc1, bc2, bc3 connect to bs correctly, I don't have any 
route/proxy to let bc to connect to other computers in the LAN, say 
10.0.0.1. Now I wish to make the network really transparent, that is as if 
bc1, bc2, bc3 is in the LAN, to be pinged and sshed. I wish to make:
* upon each ppp connection, bs ask 10.0.0.138 to assign an IP address from 
address pool to bc, also let 10.0.0.138 give other dhcp information like 
dns server, search domain etc. If bc love to register a DNS entry it should 
be able to do so.
* When someone in LAN (say 10.0.0.5) wish to connect to bc2 it should be no 
problem (so-called proxy arp).

I hope I'm clear. Am I still far away from getting that work? Where to find 
a guide to achieve that? Thank you!

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