Specifications

Niagara Release 2.3
Revised: May 22, 2002 Niagara Networking & Connectivity Guide
Chapter 6 Using Security Technologies
Default Niagara Port Numbers
6–20
Additional Open Ports on the JACE-NP
When you install a factory-fresh JACE-NP, several additional well known server
ports are, by default, open and scannable. They are listed in Table 6-3, by the model
and function:
Changing the time
synchronization port a Niagara
client uses to contact a server.
Note: If you use the Supervisor
check box, the application tries to
contact its Supervisor on the
default port of 37. To contact the
Supervisor (or any other time
synch host) on another port, use
the method shown.
Connecting to a GxPage on a
station with a changed HTTP
port.
Connecting to a host-based page
on a host with a changed Admin
port.
Table 6-2 Selected examples of specifying a port after a port change. (continued)
Action Example
Table 6-3 Additional default (non-Niagara) ports.
Platform Port Function
Embedded JACE-NP only
7 Echo—RFC 862. Once a a client establishes a connection, any data received
by the server is sent back to the client. This continues until the client
terminates the connection.
9 Discard—RFC 863. Once a client establishes a connection, any data
received by the server is thrown away. No response is sent. This continues
until the client terminates the connection.
13 Daytime—RFC 867. Once a client establishes a connection, the current date
and time is sent out on the connection as a ascii character string (and any
data received is thrown away). The service closes the connection after
sending the data.