Le ven 28/02/2003 à 16:13, Maciej Soltysiak a écrit : > > Maybe because RFC says that a SYN on a closed port must be replied with > > RST, and not ICMP port unreachable... > It is true but by sending ICMP port unreach. you inform the second > party's tcp stack that the port is unreachable, which should cause the > stack to inform the application that there is a problem. Maybe the > application (the mail daemon) was not handling this type of error. It is probably the case. > Properly written code should react for TCP RSTs and all other ICMP error > messages, and other error conditions. True. -- Cédric Blancher <blancher@cartel-securite.fr> Consultant en sécurité des systèmes et réseaux - Cartel Sécurité Tél: +33 (0)1 44 06 97 87 - Fax: +33 (0)1 44 06 97 99 PGP KeyID:157E98EE FingerPrint:FA62226DA9E72FA8AECAA240008B480E157E98EE
