TRENDnet TDM-E400 User's Guide - Page 120

to view accumulated data on, how many NAT rules have been invoked and how much data has

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TDM-E400 / TDM-C400 ADSL2+ Ethernet Modem Router User's Manual Field TCP Idle Timeout (sec) TCP Close Wait (sec) TCP Def Timeout (sec) UDP Timeout (sec) ICMP Timeout (sec) GRE Timeout (sec) ESP Timeout (sec) Default Nat Age (sec) NAPT Port Start/End Description When two computers communicate via the Internet, a TCP-based communication session is created between them to control the exchange of data packets. The TCP session can be viewed as being in one of three states, depending on the types of packets being transferred: the establishing state, where the connection is being set up, the active state, where the connection is being used to transfer data, and the closing state, in which the connection is being shut down. When a NAT rule is in effect on a TCP session in the active state, the session will timeout if no packets are received for the time specified in TCP Idle Timeout. When in the closing state, the session will timeout if no packets are received for the time specified in TCP Close Wait. When in the establishing state, the session will timeout if no packets are received for the time specified in TCP Def Timeout. Same as TCP Idle Timeout, but for UDPbased communication sessions. Same as TCP Idle Timeout, but for ICMPbased communication sessions. Same as TCP Idle Timeout, but for GREbased communication sessions. Same as TCP Idle Timeout, but for Encapsulating Security Payload-based communication sessions. For all other NAT translation sessions, the number of seconds after which a translation session will no longer be valid if no packets are received. When an NAPT rule is defined, the source ports will be translated to sequential numbers in this range. If you change any values, click . Then click the Admin tab and commit your changes to permanent system memory (see page 46). You can click to view accumulated data on how many NAT rules have been invoked and how much data has been translated. A page displays similar to the one shown in Figure 46. 120

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TDM-E400 / TDM-C400 ADSL2+ Ethernet Modem Router User’s Manual
120
Field
Description
TCP Idle Timeout (sec)
TCP Close Wait (sec)
TCP Def Timeout (sec)
When two computers communicate via the
Internet, a TCP-based communication
session is created between them to control
the exchange of data packets. The TCP
session can be viewed as being in one of
three states, depending on the types of
packets being transferred: the
establishing
state
, where the connection is being set up,
the
active state
, where the connection is
being used to transfer data, and the
closing
state
, in which the connection is being shut
down. When a NAT rule is in effect on a TCP
session in the active state, the session will
timeout if no packets are received for the time
specified in
TCP Idle Timeout
. When in the
closing state, the session will timeout if no
packets are received for the time specified in
TCP Close Wait
. When in the establishing
state, the session will timeout if no packets
are received for the time specified in
TCP Def
Timeout
.
UDP Timeout (sec)
Same as TCP Idle Timeout, but for UDP-
based communication sessions.
ICMP Timeout (sec)
Same as TCP Idle Timeout, but for ICMP-
based communication sessions.
GRE Timeout (sec)
Same as TCP Idle Timeout, but for GRE-
based communication sessions.
ESP Timeout (sec)
Same as TCP Idle Timeout, but for
Encapsulating Security Payload-based
communication sessions.
Default Nat Age (sec)
For all other NAT translation sessions, the
number of seconds after which a translation
session will no longer be valid if no packets
are received.
NAPT Port Start/End
When an NAPT rule is defined, the source
ports will be translated to sequential numbers
in this range.
If you change any values, click
. Then click the Admin
tab and commit your changes to permanent system memory (see
page 46).
You can click
to view accumulated data on
how many NAT rules have been invoked and how much data has
been translated. A page displays similar to the one shown in Figure
46.