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Werk #19415: Fix piggybacked host not handled correctly when source identifies it by IP address

Component Core & setup
Title Fix piggybacked host not handled correctly when source identifies it by IP address
Date Mar 19, 2026
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.6.0b1
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.5.0b3
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.4.0p26
Not yet released
Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Previously, if a piggyback source identified a piggybacked host by its IP address instead of its hostname, it was handled incorrectly in Checkmk:

  • The host was not identified as a piggybacked host, meaning the relevant services would not be discovered.
  • Downloading the agent output yielded empty data for such hosts

All affected lookups now also check the configured IPv4 and IPv6 addresses of the host, so piggyback data sent under either the hostname or any configured IP address is found correctly.

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