W&T 57630, Руководство пользователя

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W&T
Ports and network security
Subject to errors and modifications:
7.3 Ports and network security
7.3.1 Ports
Following is an overview of all the ports used in the Web-IO
12+12 Digital.
Port number Protocol Application Modifiable Can be
switched off
25 TCP SMTP Mail no yes
37 TCP Request to Time-Server no yes
53 UDP Request to DNS-Server no yes
69 TCP Update via TFTP no yes
80 TCP List port TCP/http no no
161 UDP SNMP no yes
42279 UDP UDP Socket 1...65535 yes
45889 UDP Binary 1 1...65535 yes
45889 UDP Binary 2 1...65535 yes
49153 TCP Binary 1 1...65535 yes
49154 TCP Binary 2 1...65535 yes
8009 TCP Help port for manual update no yes
8512 UDP Inventory no no
8513 UDP Inventory no no
8888 TCP Reset no no
1
Each port number may be used for only one service in
the Web-IO. If differing numbers are used with the
changeable ports, be sure that no port number is used twice.
7.3.2 The W&T Web-IO and network security
Security in networks is justifiably gaining increased attention. All
the experts agree that there can be no such thing as absolute
security at today‘s state of technology. Each customer must
therefore find an appropriate balance between security,
functionality and cost for his specific requirements.
To give the customer the greatest possible degree of flexibility in
this regard while responding to changing security requirements
from a pure testing and installation environment to critical
production applications, the security measures offer a high degree
of user configurability.
This document provides an overview of the security measures
implemented on the Wiesemann & Theis Web-IO and how they
can be used. It is assumed that the original W&T firmware (without