Digi TransPort - Socket Settings

Advanced Network Settings descriptions
Digi TransPort User Guide 495
Socket settings
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 used by the socket will be 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 IP address from the interface on which
the socket was created is used. The source address specified in this parameter is used 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.
Related CLI commands
Entity Instance Parameter Values Equivalent Web Parameter
sockopt n gp_ipent 0,PPP,ETH Default source IP address interface
x,y
sockopt n gp_ipadd Valid interface
number
Default source IP address interface
x,y
sockopt n sock_connto 0-2147483648 Connect Timeout s seconds
sockopt n sock_inact 0-2147483648 TCP socket inactivity timer s
seconds
sockopt n sock_keepact 0-2147483648 TCP socket keep-alive s seconds