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Description of problem:
In /etc/services, port 5666 shows the following confusing line:
###UNAUTHORIZED USE: Port 5666 used by SAIC NRPE############

The latest port assignment from IANA shows that port number 5666 is registered by Nagios for use; 

https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=5666

In other words, the line(s) should be something like in /etc/services :
nrpe        5666/tcp                          # Nagios Remote Plugin Executor
nrpe        5666/udp                          # Reserved for Nagios Remote Plugin Executor

In Summary, the /etc/services file should reflect all of the current IANA port assignments.  Can we get this fixed upstream and propagated to RHEL 7.x and 8.x?

Version-Release number of selected component (if applicable):
setup-2.12.2-1.el8.noarch.rpm

How reproducible:
- By default no entry for nrpe port 5666 in /etc/services

Steps to Reproduce:
1. Check entry in /etc/services for port 5666
2.
3.

Actual results:
###UNAUTHORIZED USE: Port 5666 used by SAIC NRPE############

Expected results:
nrpe        5666/tcp                          # Nagios Remote Plugin Executor
nrpe        5666/udp                          # Reserved for Nagios Remote Plugin Executor

Additional info:
Same has been the situation in RHEL7 and RHEL8.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:1770