-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi , Everybody , I am on the list for a month , everytime I saw your question and answers , I just want to reproduct your enviroment and trouble , and then slove it . But your troubles almost occur in the very complicated enviroment such as two router with four LANs and a PPP interface and etc. How can I simulate such a condition ? Is there any software to achive such a task ? Thank you ! -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFOHZ17tZp58UCwyMRAhgfAJ9RsnnZDZiKdeHra+hoYFqEDmkHBQCgiP5t Pn0ZTHCLjK7wUVPjjXlN6dU= =+UrL -----END PGP SIGNATURE-----