FYI: Please find an URL to a good introduction on NATs:

http://www.cisco.com/en/US/about/ac123/ac147/archived_issues/ipj_7-3/anato my.html http://www.cisco.com/en/US/about/ac123/ac147/archived_issues/ipj_7-3/anat omy.html

With kind regards

Martin Euchner. ----------------------------------------------------------------------- | Dipl.-Inf. Rapporteur | Martin Euchner Phone: +49 89 722 55790 | Siemens AG.....................Fax : +49 89 722 62366 | COM GC PS 3 mailto:Martin.Euchner@siemens.com mailto:Martin.Euchner@siemens.com | mailto:martin.euchner@ties.itu.int mailto:martin.euchner@ties.itu.int | Hofmannstr. 51 Intranet: http://ietf.icn.siemens.de/sr3/Standardisation_Topics/security/ http://ietf.icn.siemens.de/sr3/Standardisation_Topics/security/ | D-81359 Muenchen Internet: http://www.siemens.de/ http://www.siemens.de/ | __________________ | Germany -----------------------------------------------------------------------