Connection Timeout Settings - D-Link NetDefend DFL-210 User Manual

13.5. Connection Timeout Settings

13.5. Connection Timeout Settings
The settings in this section specify how long a connection can remain idle, that is to say with no data
being sent through it, before it is automatically closed. Please note that each connection has two
timeout values: one for each direction. A connection is closed if either of the two values reaches 0.
TCP SYN Idle Lifetime
Specifies in seconds how long a TCP connection, that is not yet fully established, is allowed to idle
before being closed.
Default: 60
TCP Idle Lifetime
Specifies in seconds how long a fully established TCP connection may idle before being closed.
Connections become fully established once packets with their SYN flags off have travelled in both
directions.
Default: 262144
TCP FIN Idle Lifetime
Specifies in seconds how long a TCP connection about to close may idle before finally being closed.
Connections reach this state when a packet with its FIN flag on has passed in any direction.
Default: 80
UDP Idle Lifetime
Specifies in seconds how long UDP connections may idle before being closed. This timeout value is
usually low, as UDP has no way of signalling when the connection is about to close.
Default: 130
UDP Bidirectional Keep-alive
This allows both sides to keep a UDP connection alive. The default is for NetDefendOS to mark a
connection as alive (not idle) every time data is sent from the side that opened the connection.
Connections that do not receive any data from the opening side within the UDP lifetime will
therefore be closed even if the other side continues to transmit data.
Default: Disabled
Ping Idle Lifetime
Specifies in seconds how long a Ping (ICMP ECHO) connection can remain idle before it is closed.
Default: 8
IGMP Idle Lifetime
Connection lifetime for IGMP in seconds.
Default: 12
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Chapter 13. Advanced Settings