D-Link DFL-700 - Manual (Page 77)

Connections
Click on Status in the menu bar, and then click Connections below it. A window will
appear providing information about the content of the state table.
Shows the last 100
connections opened
through the firewall.
Connections are
created when traffic is
permitted to pass via
the policies.
Each connection
has two timeout values,
one in each direction.
These are updated
when the firewall
receives packets from
each end of the
connection. The value
shown in the Timeout
column is the lower of
the two values.
Possible values in
the State column
include: TPC_CLOSE,
TCP_OPEN,
SYN_RECV, FIN_RECV and so on.
The Proto column can have:
TCP - The connection is a TCP connection
PING - The connection is an ICMP ECHO connection
UDP - The connection is a UDP connection
RAWIP - The connection uses an IP protocol other than TCP, UDP or ICMP
The Source and Destination columns show from what ip and port on the source interface
is the connection, and to what interface with what port number is the connection to.