Bibliography

What is ADSL:
http://www.howstuffworks.com/dsl.html

The HOWTO-ADSL-BEZEQ and patched PPTP versions:
http://www.pointer.co.il/~mulix/

pptp (old version) homepage:
http://cag.lcs.mit.edu/~cananian/Projects/PPTP/

pptp (new version) homepage:
http://www.scooter.cx/alpha/pptp.html

The pptp sources include copies of all relevant RFCs.