DNS - Cache Failed Lookups

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Section: HKEY_LOCAL_MACHINE\SOFTWARE\SolarWinds\Syslogd\Properties

 

Value (STRING): DNSCacheFailedLookups

 

Min value:        0

Max value:        1

Default value:        1

Type: 1=Cache Failed DNS lookups, 0=Do not Cache Failed DNS lookups                

 

DNSCacheFailedLookups

Improves DNS name resolution performance by caching failed lookups.  In the event that a DNS server responds with a valid response, but where the response does not include a resolved name, Kiwi Syslog Server will cache that response to avoid repeated queries to the DNS server.  This situation can occur when querying a DNS server for the name of and IP address that the DNS server itself does not know.  Instead of timing out, the DNS server sends a valid response of "NAME NOT FOUND".  This is the sort of response that is cached, which avoids repeated queries to the DNS server for a name that will not be found.   Failed lookups will be flushed from the cache at the frequency defined in "Flush entries after X minutes".

 

 

Running Kiwi Syslog Server on a native 64-bit machine?

 

 On 64-bit Windows installations, Kiwi Syslog Server runs in WOW (Windows on Windows) 32-bit

 emulated mode.  In WOW mode, the SolarWinds registry hive resides in:

 HKEY_LOCAL_MACHINE\Software\WOW6432Node, not in HKEY_LOCAL_MACHINE\Software

 as it does on a native 32-bit Windows environment.

 

 If you are running Kiwi Syslog Server on a native 64-bit windows machine, please re-map all

 registry settings from HKEY_LOCAL_MACHINE\Software\SolarWinds\... to:

HKEY_LOCAL_MACHINE\Software\WOW6432Node\SolarWinds\...