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