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144 lines
6.0 KiB
Plaintext
144 lines
6.0 KiB
Plaintext
This directory contains a set of scripts which have been used on Linux
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as well as Solaris 2.x systems to initiate or maintain a connection
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with PPP. The files in this directory were contributed by Al Longyear
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(longyear@netcom.com) and Adi Masputra (adi.masputra@sun.com)
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------------------------------------------------------------------------
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1. README
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This file. You are reading it. It is just documentation.
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------------------------------------------------------------------------
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2. ppp-on
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This script will initiate a connection to the PPP system. It will run
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the chat program with the connection script as a parameter. This is a
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possible security hole. However, it is simple. It is meant to replace
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the previous version of ppp-on which was not very functional.
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The ppp-on script has entries for the account name, password, IP
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addresses, and telephone numbers. The parameters are passed to the
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pppd process and, then in turn, to the second part of the connect
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script, as a set of environment variables.
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Please make sure that you put the full path name to the ppp-on-dialer
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script in the reference to it in ppp-on.
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------------------------------------------------------------------------
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3. ppp-on-dialer
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This is the second part to the simple calling script, ppp-on. It
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executes the chat program to connect the user with a standard UNIX
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style getty/login connection sequence.
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------------------------------------------------------------------------
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4. callback
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This script may be used in lieu of the ppp-on-dialer to permit the
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common modem callback sequence. You may need to make changes to the
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expected prompt string for the modem.
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The script works by disabling the system's detection of the DCD
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condition and working on the modem status message "NO CARRIER" which
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is generated when the modem disconnects.
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It is crude. It does work for my modem connection. Use as you see fit.
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------------------------------------------------------------------------
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5. redialer
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The redialer script is a replacement for the ppp-on-dialer script. It
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will do 'attack dialing' or 'demon dialing' of one or more telephone
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numbers. The first number which responds will be used for a
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connection.
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There is a limit of ten attempts and a 15 second delay between dialing
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attempts. Both values are set in the script.
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------------------------------------------------------------------------
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6. ppp-off
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This is a script which will terminate the active ppp connection. Use
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as either "ppp-off" to terminate ppp0, or "ppp-off <device>" to
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terminate the connection on <device>. For example, "ppp-off ppp2" will
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terminate the ppp2 connection.
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------------------------------------------------------------------------
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7. secure-card
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This script was written by Jim Isaacson <jcisaac@crl.com>. It is a script
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for the 'expect' programming language used with Tcl. You need to have
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expect and Tcl installed before this script may be used.
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This script will operate with a device marketed under the name "SecureCARD".
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This little device is mated with its controller. On the credit card size
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device, there is a sequence number which changes on a random basis. In order
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for you to connect you need to enter a fixed portion of your account name
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and the number which is displayed on this card device. The number must match
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the value at the controller in order for the account name to be used.
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The problem is that chat uses fixed response strings. In addition, the
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timing for running the script may prevent the use of a script that reads the
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value before it starts the dial sequence. What was needed was a script which
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asked the user at the user's console at the time that it is needed.
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This led to the use of expect.
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------------------------------------------------------------------------
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8. ppp-on-rsh
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This script will initiate a PPP connection to a remote machine using rsh.
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This is implemented by creating a master/slave pseudo-tty with the slave
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pointing to rsh, specifically with the 'pty' and 'notty' options of pppd.
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It is assumed that the remote machine contains some sort of trust
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mechanisms (such as ~/.rhosts, et al) to allow the local machine to
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connect via rsh as root.
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------------------------------------------------------------------------
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9. ppp-on-ssh
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This script will initiate a PPP connection to a remote machine using the
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secure shell, or ssh. I've only tested this on ssh 1.x, so those of you
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who are running ssh 2.x mahy need to modify the ssh options slightly.
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This is implemented by creating a master/slave pseudo-ttyt with the slave
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pointing to ssh, specifically with the 'pty' and 'notty' options of pppd.
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It is assumed that the remote machine can accept the ssh connection from
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the local host, in the sense that all ssh authentication mechanisms have
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been properly configured, so that a remote root user can open a ssh
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connection.
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------------------------------------------------------------------------
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10. options-rsh-loc & options-rsh-rem
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These options files accompany the ppp-on-rsh script mentioned above. In
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theory, you'd want to copy the options-rsh-rem to the remote machine where
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in.rshd is running. The only extra option required on the remote machine
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options file is the 'notty' option. In addition, all ASCII control characters
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[0x00 to 0x1f], plus 0xff, are escaped. This may need to be modified
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depending on the rsh (or pseudo-tty) implementation which may differ across
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platforms, for further optimizations.
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------------------------------------------------------------------------
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11. options-ssh-loc & options-ssh-rem
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These options files accompany the ppp-on-ssh script mentioned above. I've
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only tested this on ssh 1.x, so those of you who are running ssh 2.x need
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to modify the ssh options slightly. In theory, you'd want to copy the
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options-ssh-rem to the remote machine where sshd daemon is running. The only
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extra options required on the remote machine options file is the 'notty'
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option. In addition, all ASCII control characters [0x00 to 0x1f], plus 0xff,
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are escaped. This may need to be modified depending on the ssh (or
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pseudo-tty) implementation which may differ across platforms, for further
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optimizations.
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