Sometimes it might be necessary to override the maximum adjustment. For example, if time
synchronization has just been enabled and the initial time difference is greater than the maximum
adjust value. It is then possible to manually force a synchronization and disregard the maximum
adjustment parameter.
Example 3.26. Forcing Time Synchronization
This example demonstrates how to force time synchronization, overriding the maximum adjustment setting.
Command-Line Interface
gw-world:/> time -sync -force
Synchronization Intervals
The interval between each synchronization attempt can be adjusted if needed. By default, this value
is 86,400 seconds (1 day), meaning that the time synchronization process is executed once in a 24
hour period.
D-Link Time Servers
Using D-Link's own Time Servers is an option in NetDefendOS and this is the recommended way of
synchronizing the firewall clock. These servers communicate with NetDefendOS using the SNTP
protocol.
When the D-Link Server option is chosen, a predefined set of recommended default values for the
synchronization are used.
Example 3.27. Enabling the D-Link NTP Server
To enable the use of the D-Link NTP server:
Command-Line Interface
gw-world:/> set DateTime TimeSynchronization=D-Link
Web Interface
1.
Go to System > Date and Time
2.
Select the D-Link TimeSync Server radio button
3.
Click OK
As mentioned above, it is important to have an external DNS server configured so that the D-Link
Time Server URLs can be resolved during the access process.
3.8.4. Settings Summary for Date and Time
Below is a summary of the various settings for date and time:
Time Zone
3.8.4. Settings Summary for Date and
Time
Chapter 3. Fundamentals
141
Summary of Contents for DFL-1600 - Security Appliance
Page 27: ...1 3 NetDefendOS State Engine Packet Flow Chapter 1 NetDefendOS Overview 27 ...
Page 79: ...2 7 3 Restore to Factory Defaults Chapter 2 Management and Maintenance 79 ...
Page 146: ...3 9 DNS Chapter 3 Fundamentals 146 ...
Page 227: ...4 7 5 Advanced Settings for Transparent Mode Chapter 4 Routing 227 ...
Page 241: ...5 4 IP Pools Chapter 5 DHCP Services 241 ...
Page 339: ...6 7 Blacklisting Hosts and Networks Chapter 6 Security Mechanisms 339 ...
Page 360: ...7 4 7 SAT and FwdFast Rules Chapter 7 Address Translation 360 ...
Page 382: ...8 3 Customizing HTML Pages Chapter 8 User Authentication 382 ...
Page 386: ... The TLS ALG 9 1 5 The TLS Alternative for VPN Chapter 9 VPN 386 ...
Page 439: ...Figure 9 3 PPTP Client Usage 9 5 4 PPTP L2TP Clients Chapter 9 VPN 439 ...
Page 450: ...9 7 6 Specific Symptoms Chapter 9 VPN 450 ...
Page 488: ...10 4 6 Setting Up SLB_SAT Rules Chapter 10 Traffic Management 488 ...
Page 503: ...11 6 HA Advanced Settings Chapter 11 High Availability 503 ...
Page 510: ...12 3 5 Limitations Chapter 12 ZoneDefense 510 ...
Page 533: ...13 9 Miscellaneous Settings Chapter 13 Advanced Settings 533 ...