52 lines
2.0 KiB
Plaintext
Executable File
52 lines
2.0 KiB
Plaintext
Executable File
Microsoft Call Back Configuration Protocol.
|
|
by Pedro Roque Marques
|
|
(updated by Paul Mackerras)
|
|
|
|
The CBCP is a method by which the Microsoft Windows NT Server may
|
|
implement additional security. It is possible to configure the server
|
|
in such a manner so as to require that the client systems which
|
|
connect with it are required that following a valid authentication to
|
|
leave a method by which the number may be returned call.
|
|
|
|
It is a requirement of servers to be so configured that the protocol be
|
|
exchanged.
|
|
|
|
So, this set of patches may be applied to the pppd process to enable
|
|
the cbcp client *only* portion of the specification. It is primarily
|
|
meant to permit connection with Windows NT Servers.
|
|
|
|
The ietf-working specification may be obtained from ftp.microsoft.com
|
|
in the developr/rfc directory.
|
|
|
|
The ietf task group has decided to recommend that the LCP sequence be
|
|
extended to permit the callback operation. For this reason, these
|
|
patches are not 'part' of pppd but are an adjunct to the code.
|
|
|
|
To enable CBCP support, all that is required is to uncomment the line
|
|
in Makefile.linux that sets CBCP=y and recompile pppd.
|
|
|
|
I use such script to make a callback:
|
|
|
|
pppd debug nodetach /dev/modem 115200 crtscts modem \
|
|
callback 222222 name NAME remotename SERVER \
|
|
connect 'chat -v "" atz OK atdt111111 CONNECT ""'
|
|
sleep 1
|
|
pppd debug /dev/modem 115200 crtscts modem \
|
|
name NAME remotename SERVER defaultroute \
|
|
connect 'chat -v RING ATA CONNECT "\c"'
|
|
|
|
First we invoke pppd with 'nodetach' option in order to not detach from
|
|
the controlling terminal and 'callback NUMBER' option, then wait for
|
|
1 second and invoke pppd again which waits for a callback (RING) and
|
|
then answers (ATA). Number 222222 is a callback number, i.e. server will
|
|
call us back at this number, while number 111111 is the number we are
|
|
calling to.
|
|
|
|
You have to put in /etc/ppp/chap-secrets the following two lines:
|
|
|
|
NAME SERVER PASSWORD
|
|
SERVER NAME PASSWORD
|
|
|
|
You have to use your real login name, remote server name and password.
|
|
|