hostnames in allowed_hosts works only when there is an entry in /etc/hosts file

[Arvi2020]

hostname entries in ncpa.cfg allowed_
We get a 403 error when the connection is attempted from the host mentioned in ncpa.cfg . This has been tried on NCPA 2.4.0 on Solaris 11 and NCPA 3.1.1 on Windows Server 2016 . (Though ping works fine, confirming no issue with DNS resolution)
The connection works fine ONLY when there is an entry in /etc/hosts file
The same behavior is observed on both Solaris 11 and Windows Server 2016

Please take note of this bug and fix with the next release
Also , if a fix for this can be provided for NCPA 2.4.0 on Solaris11

Thanks

[ne-bbahn]

This may be the same issue here: https://support.nagios.com/forum/viewtopic.php?t=53990

[ne-bbahn]

We have some code handling if dual-stack mode fails in NCPA 3, but it may not be properly handling allowed_hosts and it may not be implemented in NCPA 2. I'll investigate.
My hopes are to get NCPA 3 working on Solaris, in which case you'd just have to migrate to NCPA 3 if it's being handled properly. If not, I'll try to have a fix in 3.1.4/3.2 or whatever the next release will be called.

[Arvi2020]

Please share steps how to get NCPA 3 working on Solaris
The last build available for Solaris 11 is NCPA 2.4.0