Thank you for your information.  I tried to work it out for the couple of
days.  However, I still not yet successfully established the ppp link.  I
have a few questions.  I think you can be help.

On Sun, 13 Feb 2000, Miles Nordin wrote:

> On Mon, 14 Feb 2000, Chan Yiu Wah wrote:
> 
> > I need the pppd server
> 
> You have to be patient and a fairly studly sysadmin to do this well.  I
> did it (poorly) myself once.
> 
> 1. Arrange to have your ``server'' answer the phone.  The slickest way is
>    to install and configure mgetty from pkgsrc.  You may be able to get 
>    our uugetty(8) to answer the phone--there are even ppp entries in our 
>    example gettytab--but mgetty includes far greater complexity, to the
>    ends of being better able to understand the strange command language of
>    so-called ``smart'' modems.  My prediction is that installing and
>    reading about mgetty will save you time.
> 

I had tried and successully installed and configured the mgetty.  It can
be used to send out fax and received fax.

>    This is by far the hardest part.  I hope you bought a modem with lights
>    on it!
> 
> 2. Arrange to have pppd started once the phone is answered.  Either make a
>    fake user with pppd as her shell, or better yet have pppd started
>    instead of /usr/bin/login.  Some getty's (like ours, for example) are
>    capable of automatically starting pppd if they see a ppp handshake.
> 
>    If you use pppd as a shell, your client will need a chat(8) script to
>    login.  If your getty can start ppp instead of login, then you need
>    only use chat for dialing on the client side.

I had add a fake user with /usr/sbin/ppd as the login shell.

> 
> 3. Provide the right config files to the server's pppd.  pppd(8) will 
>    help.  These are almost exactly the same as the client, except:
> 
>    o you must specify the IP address.  there is no keyword for this--you
>      just put the local_address:remote_address in the config file
> 
>       192.168.0.1:192.168.0.15

I setup the /etc/ppp/options.tty00 which include the
local-addr:renmote-addr only.

> 
>      if you are using an IPv6-only network, I think you can skip this
>      step, but I'm not sure exactly how pppd must be configured for IPv6.

However the system connect with very short period and then disconnect.
Here is the part of log messages.

======= messaages =======
Feb 16 22:42:50 lts159 pppd[1797]: Starting link
Feb 16 22:43:15 lts159 pppd[1797]: Serial connection established.
Feb 16 22:43:15 lts159 pppd[1797]: Connect: ppp0 <--> /dev/modem
Feb 16 22:43:21 lts159 pppd[1797]: Remote message: Login ok
Feb 16 22:43:21 lts159 pppd[1797]: Deflate (15) compression enabled
Feb 16 22:43:21 lts159 pppd[1797]: Couldn't delete default route: No such
process
Feb 16 22:43:21 lts159 pppd[1797]: Remote IP address changed to
202.66.33.78
Feb 16 22:43:21 lts159 pppd[1797]: IPCP terminated by peer (Unauthorized
remote IP address)
Feb 16 22:43:21 lts159 pppd[1797]: LCP terminated by peer (No network
protocols running)
Feb 16 22:43:25 lts159 pppd[1797]: Connection terminated.
Feb 16 22:43:25 lts159 pppd[1797]: Connect time 0.1 minutes.

======= messaages =======


I can't go further.  Can you help ?  If you want all the config files, I
can send it to you.  Thanks

Clarence


> 
>    o you should set up authentication.  either PAP, maybe based on the
>      Unix passwd authentication subsystem, or better yet CHAP based on 
>      ppp-specific passwords.
> 
> 4. Arrange the routing.  If you want to set up one PPP link between two
>    LAN's, you should go easy on yourself and use lots of IP address-space.
> 
>    o The two LAN's need to be different subnets.
>    o The ppp link should have a subnet all to itself.
>    o Upstream routers need to know how to get to your LAN B.
> 
>        cloud
>          |
>  LAN A   |  ne0, 192.168.10.22 on 192.168.10.0/24
>    +-----+-----+
>    | ``server''|
>    +-----+-----+
>          |  ppp0, 192.168.0.1 on 192.168.0.0/24
>    +-----+-----+
>    | modem     |
>    +-----------+
>         ||
>         || telephone
>         ||
>    +-----+-----+
>    | modem     |
>    +-----------+
>          |  ppp0, 192.168.0.2 on 192.168.0.0/24
>    +-----+-----+
>    | ``client''|
>    +-----+-----+ 
>   LAN B  |  tlp0, 192.168.11.1 on 192.168.11.0/24
> 
> On the [default router]
>  192.168.11.0/24 -> 192.168.10.22
> 
> On the ``server,''
>  192.168.11.0/24 -> 192.168.0.2
>  default         -> [default router]
> 
> On the ``client,''
>  default         -> 192.168.0.1
> 
> Use of fewer IP addresses is left as an exercise for the reader.
> 
> -- 
> Miles Nordin / v:+1 720 841-8308 fax:+1 530 579-8680
> 555 Bryant Street PMB 182 / Palo Alto, CA 94301-1700 / US
> 
> 
>