Hi!

I have a small Ethernet network with 2 PCs with Windows95/NT4.0 and a PC
running RedHat 5.0 as server. I have also already a PPP connection from the
server to the Internet through a provider. I have only one phone line
available.

Now I have bought a notebook with Windows95 and I would like to connect it
to the LAN either with an Ethernet interface when I'm in the office or
through a PPP modem connection, when I'm far away. 

On my RedHat 5.0 server I have configured PPP to connect with my ISP with
ppp0 on /dev/ttyS0 (I configured it with the graphical tool). I'm getting
the ppp0 IP-address from my provider dynamically when I create a
connection. I'm using PAP and everything works fine.

On the same ttyS0 I have configured mgetty and now I can login on my RedHat
server through a modem connection from a notebook. It also works fine. I
can also receive faxes on the same line (ttyS0) and they are saved on the
hard disk.

Now I would like to dial-in also with a PPP connection from the notebook.
I have read that it's possible to configure PPP so that it works on the
same serial line (in this case /dev/ttyS0 with ppp0). A problem may be that
the same ppp0 in one case is getting its IP-address dynamically from the
ISP and in the other case, acting as "server" has to have either a static
IP-address or to get it from the notebook that is trying to connect as client.

I have tryed a lot also with uncommenting the /AutoPPP/ line in the
login.config file for mgetty. The line I have used is:

/AutoPPP/ - a_ppp /usr/sbin/pppd -detach auth -chat +pap login kdebug 7 debug

I have cheched that AutoPPP is active in mgetty. Using the following command

  strings $(which mgetty) | grep PPP

results in following lines:

  getlogname (AUTO_PPP), read:
  /AutoPPP/

I've read in an old message in the redhat mail list, that I can check this
way that mgetty is compiled with the AUTOPPP option.

Unfortunately although I have read many messages concerning AutoPPP on the
mailing list, I couldn't find enough information for my case. I need to
connect from the LAN (RedHat server) to the Internet (dynamic-IP address)
and to connect from the notebook with PPP through the same /dev/ttyS0 to
the LAN (static or dynamic IP-address?).

Now assuming that the right way is with AutoPPP:
- I'm using ppp0, what's a_ppp a few lines above?
- Does I need a clone of ppp0? or an alias? I didn't find any info about both
  features of the graphical interface (what are they used for?).
- Does I need to declare an a_ppp interface with the control_panel or
  will it be created automatically?
- Is a_ppp mapped to ppp0 and using /dev/ttyS0?

When I try to login from the notebook with PPP the PAP authorization fails,
and I don't know:
- Does I have to log in with one of the users/passwords declared in the
  passwd file or does I have to log in as AutoPPP?
- In this case does I have to create an AutoPPP user?
- An other possibility could be to use other special PPP passwords for the
  same users and declare them in the pap-secrets file?

How does I have to proceed?

Thanks a lot in advance!

Enrico

+--------------------------------------------------------------------+
| Enrico Ballarin Dolfin             email: [EMAIL PROTECTED] |
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