ZyXEL Communications 91-009-073003B manual 25

	Table of Contents
Chapter 45
System ...................................................................................................................................	675
45.1 Overview ..........................................................................................................................	675
45.1.1 What You Can Do in this Chapter ..........................................................................	675
45.2 Host Name .......................................................................................................................	676
45.3 Date and Time ................................................................................................................	676
45.3.1 Pre-defined NTP Time Servers List ........................................................................	679
45.3.2 Time Server Synchronization .................................................................................	680
45.4 Console Port Speed .........................................................................................................	681
45.5 DNS Overview .................................................................................................................	681
45.5.1 DNS Server Address Assignment ..........................................................................	682
45.5.2 Configuring the DNS Screen ..................................................................................	682
45.5.3 Address Record ....................................................................................................	685
45.5.4 PTR Record ...........................................................................................................	685
45.5.5 Adding an Address/PTR Record ............................................................................	685
45.5.6 Domain Zone Forwarder .......................................................................................	686
45.5.7 Adding a Domain Zone Forwarder .........................................................................	686
45.5.8 MX Record ............................................................................................................	687
45.5.9 Adding a MX Record ..............................................................................................	688
45.5.10 Adding a DNS Service Control Rule ....................................................................	688
45.6 WWW Overview ..............................................................................................................	689
45.6.1 Service Access Limitations ....................................................................................	689
45.6.2 System Timeout .....................................................................................................	690
45.6.3 HTTPS ...................................................................................................................	690
45.6.4 Configuring WWW Service Control ........................................................................	691
45.6.5 Service Control Rules ............................................................................................	695
45.6.6 Customizing the WWW Login Page .......................................................................	695
45.6.7 HTTPS Example ....................................................................................................	699
45.7 SSH ..............................................................................................................................	706
45.7.1 How SSH Works ....................................................................................................	707
45.7.2 SSH Implementation on the ZyWALL .....................................................................	708
45.7.3 Requirements for Using SSH .................................................................................	708
45.7.4 Configuring SSH ....................................................................................................	708
45.7.5 Secure Telnet Using SSH Examples ......................................................................	710
45.8 Telnet ...............................................................................................................................	711
45.8.1 Configuring Telnet ..................................................................................................	712
45.9 FTP .................................................................................................................................	713
45.9.1 Configuring FTP .....................................................................................................	713
45.10 SNMP ...........................................................................................................................	715
45.10.1 Supported MIBs ...................................................................................................	717
45.10.2 SNMP Traps .........................................................................................................	717
45.10.3 Configuring SNMP ...............................................................................................	717
45.11 Vantage CNM ................................................................................................................	719
ZyWALL USG 50 User’s Guide	25