pptp --version (return code: 0)
pptp version 1.8.0
pptp -HELP (return code: 1)
pptp: unrecognized option '--help'
--missing-window <n> Activate 'missing window' validation and set tolerance to <n> packages (300=default, 6000=recommended)
Copyright (C) 2000 Free Software Foundation
This program comes with ABSOLUTELY NO WARRANTY; for details see source.
This is free software, and you are welcome to redistribute it under certain
conditions; see source for details.
Usage:
pptp version 1.8.0 <hostname> [<pptp options>] [[--] <pppd options>]
Or using pppd's pty option:
pppd pty "pptp <hostname> --nolaunchpppd <pptp options>"
Available pptp options:
--version Display version number and exit
--phone <number> Pass <number> to remote host as phone number
--nolaunchpppd Do not launch pppd, for use as a pppd pty
--quirks <quirk> Work around a buggy PPTP implementation
Currently recognised values are BEZEQ_ISRAEL only
--debug Run in foreground (for debugging with gdb)
--sync Enable Synchronous HDLC (pppd must use it too)
--timeout <secs> Time to wait for reordered packets (0.01 to 10 secs)
--nobuffer Disable packet buffering and reordering completely
--idle-wait Time to wait before sending echo request
--max-echo-wait Time to wait before giving up on lack of reply
--logstring <name> Use <name> instead of 'anon' in syslog messages
--localbind <addr> Bind to specified IP address instead of wildcard
--rtmark <n> Use specified policy routing mark for all packets
--nohostroute Do not add host route towards <hostname>
--loglevel <level> Sets the debugging level (0=low, 1=default, 2=high)
--test-type <type> Damage the packet stream by reordering
--test-rate <n> Do the test every n packets