Werk #13170: check_dns: added option to use default DNS server

Component

Checks & agents

Title

check_dns: added option to use default DNS server

Date

Oct 27, 2021

Level

Trivial Change

Class

New Feature

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.1.0b1	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)
2.0.0p14	Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

If no DNS server is specified the error message "CRITICAL - Plugin timed out while executing system call" could have been reported. The reason for this error is that the check_dns option "-s" is used with the hostname as DNS server. The host might not be a DNS server and a timeout occurs.

The new option "Use default DNS server" will omit the option "-s" for check_dns. In this case the default DNS server of the checkmk server will be used and no timeout occurs any more.

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