SonicWALL TZ 190 Manuale Utente

Chapter 41: 

The TCP Settings lets you view statistics on TCP Traffic through the security appliance and 
manage TCP traffic settings. The page is divided into three sections

TCP Traffic Statistics

TCP Settings

SYN/RST/FIN Flood Protection

The TCP Traffic Statistics table provides statistics on the following:

Connections Opened – Incremented when a TCP connection initiator sends a SYN, or a 
TCP connection responder receives a SYN.

Connections Closed – Incremented when a TCP connection is closed when both the 
initiator and the responder have sent a FIN and received an ACK.

Connections Refused – Incremented when a RST is encountered, and the responder is in 
a SYN_RCVD state.

Connections Aborted – Incremented when a RST is encountered, and the responder is in 
some state other than SYN_RCVD.

Total TCP Packets – Incremented with every processed TCP packet.

Validated Packets Passed – Incremented under the following conditions:

When a TCP packet passes checksum validation (while TCP checksum validation is 
enabled).

When a valid SYN packet is encountered (while SYN Flood protection is enabled).

When a SYN Cookie is successfully validated on a packet with the ACK flag set (while 
SYN Flood protection is enabled).

Corrupted Packets Dropped - Incremented under the following conditions:

When TCP checksum fails validation (while TCP checksum validation is enabled).