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:] --- [many hosts, -]
            |     +-- [ <-tun->] -- [bc1]
    [bs:] -- [ <-tun->] -- [bc2]
                  +-- [ <-tun->] -- [bc3] 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 to

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 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 to assign an IP address from address pool to bc, also let 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 wish to ssh to bc2, bs should be smart enough to make it happen. Is it the so-called arp proxy?
* And bc2 connects (ssh or ftp) to any other hosts in the LAN as well.

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

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