Avaya Configuring IP Utilities Instrukcja Użytkownika Strona 129

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Customizing NTP Services
117358-A Rev. A 7-13
Specifying a Filter Type and IP Subnet Mask
The NTP filter type parameter allows you to specify whether to drop or accept
NTP timestamps destined for a local NTP client. By default, the filter type is set to
Restrict, which tells NTP to drop specific NTP timestamps destined for a local
NTP client based on its source IP address and source subnet mask. For example, if
you have ten remote time servers broadcasting to a router and you want to receive
NTP timestamps from only three remote time servers, you can restrict the other
seven remote time servers.
When you set the Filter Type to Prefer, the local NTP client accepts packets
received from remote time servers.
The Mask parameter allows you to specify an IP subnet mask address to filter
NTP timestamps based on a source subnet.
Using Site Manager
Complete the tasks in the following table to add access control to a time server.
6. Set the Access IP Address parameter.
Click on Help or see the parameter
descriptions on page A-18.
7. Click on OK. The source IP address of the remote time
server whose access you want to restrict
appears in the NTP Access Configuration
List window.
Site Manager Procedure
You do this System responds
1. In the Configuration Manager window,
choose Protocols.
The Protocols menu opens.
2. Choose Global Protocols. The Global Protocols menu opens.
3. Choose NTP. The NTP menu opens.
(continued)
Site Manager Procedure
(continued)
You do this System responds
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