Configure Advanced Network settings Socket settings
Digi TransPort WR Routers User Guide 519
Socket settings
The Advanced Network Socket Settings are as follows:
Default source IP address interface x,y
The values in these two text boxes define the interface (None, PPP, ETH) and the instance
number of the interface to use as a source address for IP when not using the interface that the
socket was created on. The router creates general-purpose sockets automatically when the
controlling application requests them, for example, when TPAD calls are made over IP or XOT.
Normally, the source address the socket uses is that of the outgoing interface, usually PPP.
However, for some applications, such as when setting up a VPN, it may be necessary to specify
that the socket uses a different source address such as that of the local Ethernet port. This
parameter specifies the interface from which the source address should be derived.
Note Even when this parameter is not configured, the router uses IP address from the interface on
which the socket was created. It uses the source address specified in this parameter only if it
causes the traffic to match an Eroute and therefore be sent using IPsec or GRE.
Connect Timeout s seconds
The amount of time after which a TCP socket may remain idle before being closed. If the value is
set to 0, the socket may remain open indefinitely.
TCP socket inactivity timer s seconds
The maximum period of inactivity, in seconds, that can occur before and open TCP/IP socket is
closed. The default value is 300 seconds (five minutes), and normally should not need to be
changed.
TCP socket keep-alive s seconds
The amount of time, in seconds, between sending keep-alive messages over open TCP
connections. The purpose of these messages is to prevent a connection from closing even when
no data is being transmitted or received. The default value of this parameter is 0, which disables
keep-alive messages.
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