DNS cache management - BlueCat Integrity

DNS cache management - BlueCat Integrity - 26.1.0

Address Manager Administration Guide

ft:locale

en-US

Product name

BlueCat Integrity

Version

26.1.0

Delete DNS information from the DNS recursive or caching server.

When a DNS caching or recursive server obtains a result, the query is temporarily cached according to the record's time to live (TTL) value. This is normally a good idea, as it reduces the number of queries that the caching or recursive servers need to make for known hosts. However, when an issue with a particular server or domain is found, these problematic records will persist until the TTL has expired.

Address Manager provides the ability to flush DNS information from the DNS recursive or caching server as needed. It allows you to selectively remove specific cache entries or all entries from the DNS cache to address problems found when troubleshooting DNS. If no DNS deployment role is assigned to a server, Address Manager will display a message: No DNS deployment role assigned to this server.

Important:

Non-administrative users must be granted deployment privilege in order to clear the server cache. Previously, non-administrative users only required the View access right to clear the server cache. For more information, refer to Setting and changing default access rights.
To clear all cache entries in all views, the total number of views associated with the server must not exceed 1000.
Clearing the DNS cache will fail if the server’s associated DNS view name contains a space. As a best practice, BlueCat recommends to not include any spaces in the names of DNS views.

To clear the DNS cache from the server:

Select the Servers tab in the sidebar, then select Servers.
Select the name of a server.
Select the Services tab.
Under Core services, locate the DNS service panel.
Select Actions > Clear cache.
In the Clear DNS cache window that opens, configure the following parameters:
- Cache type—from the drop-down list, select the type of cache entries that you want to delete:
  - View—select to delete DNS cache entries in DNS views. Then, you can choose to either clear all views associated with the server, or clear view-specific cache entries in a single view:
    Do one of the following:
    
    To clear all cache entries in all views, select the Select all views checkbox.
    
    To clear view-specific cache entries in a single view, select a view from the Specify view drop-down list. Only views with DNS roles assigned to the server will display in this drop-down list.
  - Domain—select to delete domain name cache entries. Then, you can choose to either clear all domain name entries in all views associated with the server, or clear view-specific domain name entries in a single view:
    Do one of the following:
    
    To clear all domain name cache entries in all views associated with the server, select the Select all views checkbox.
    
    To clear domain name cache entries from a particular view, select a specific view from the Specify view drop-down list. Only views with DNS roles assigned to the server will display in this drop-down list.
    
    Domains—this field is displayed when you select Domain from the Cache type drop-down list. Enter a list of domains that you want to clear from your DNS server cache. You can enter multiple names in CSV format or one entry per line
  - Host—select to delete host name cache entries. Then, you can choose to either clear all host name entries in all views associated with the server, or clear view-specific host name entries in a single view:
    Do one of the following:
    
    To clear all host name cache entries in all views, select the Select all views checkbox.
    
    To clear host name cache entries from a particular view, select a specific view from the Specify view drop-down list. Only views with DNS roles assigned to the server will display in this drop-down list.
    
    Host names—this field is displayed when you select Host from the Cache type drop-down list. Enter a list of host names that you want to clear from your DNS server cache. You can enter multiple names in CSV format or one entry per line.
Select Clear cache.