Direct And Indirect Proxy Connections - DPS Telecom NetGuardian 420 Web User Manual

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Hot Tip!
SPS8 ports do not support direct proxy. You must navigate via the TTY menu. If interfacing a T/Mon to SPS8
through a NetGuardian, set the port type to TCP.
UDP
Makes reach-through available at UDP ports (up to 4 UDP ports available).
CHAN
Creates logical bridge to odd/even partner. The odd/even partners are pairs of 1-2 and 3-4. This allows the
NetGuardian to view communication traffic in either direction when inserted in the serial communication path
between two devices. This is accomplished by going "in" to the NetGuardian with one device and "out" to the other
device from the odd/even partner port. Data is passed directly from one port to its odd/even partner without being
altered in any way. This ability greatly simplifies troubleshooting communication problems by isolating the non-
communicating device.
When is selected, the NetGuardian automatically activates the odd/even partner as
CHAN
the odd/even pairs can be set to any available rate except for any combination of 19200 and 38400 between the
two ports. Use "SPO" filter debug to analyze protocol traffic in a terminal.
CRFT
Causes the data port to have the same functionality as the front panel craft port.
CAP
Allows the user to capture debug information. The debug information is stored in the receive queue of the
NetGuardian (See section "Monitoring Data Port Activity" for more information). This is used primarily as a
troubleshooting feature.
ECU
For use if an ECU is connected to this port (see section "Building Access Controller").
SCAN
Creates logical bridge between all ports set up as SCAN. When data comes in one port, it will forward out all
other SCAN ports. The SCAN port defined under SCAN Serial Port will be the only port that will respond to scan
polls. The rest will only forward data.
MBSI
Allows the use of the optional Cellguard Battery Monitoring System. When MBSI is selected, the NetGuardian
automatically sets the Description and Baud settings.

4.3.5.2.2 Direct and Indirect Proxy Connections

The NetGuardian supports both direct and indirect proxy connections. In a direct proxy connection, the user enters
an IP address and port number to Telnet directly to a TCP serial port. In an indirect connection, the user navigates
the TTY menu to select a proxy port. Because the TTY interface is password protected, thus providing greater
security, indirect connections are preferred. Some users prefer to disable direct proxy for all connections in order
to enforce the password security provided by the TTY interface.
To disable proxy connections you may either:
1. Set the proxy port to an uncommon value.
2. Set the data ports to
off
which effectively disables the port from direct access. This is a more secure and convenient method of
disabling proxy access.
in the field. When set to
Type
, the port is no longer associated with a TCP socket,
off
. Baud rates for
CHAN