/usr/lib/ipa/oddjob/org.freeipa.server.conncheck is in freeipa-server 4.3.1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 | #!/bin/sh
exec /usr/sbin/ipa-replica-conncheck --replica "$1" 2>&1
|