Description of problem:

ypxfrd is not using a static port as configured in /etc/sysconfig/network .

Version-Release number of selected component (if applicable):
ypserv-4.1-1.el8.x86_64
RHEL8.6

How reproducible:

Steps to Reproduce:

• From my testbox:
  =======
  1. Configure NIS server on RHEL8.6 machine

2. Add below in "/etc/sysconfig/network"
-----------

1. Created by anaconda
   NISDOMAIN = rh8nis.local #<== change NIS domain a per the environment
   YPSERV_ARGS="-p 834"
   YPXFRD_ARGS="-p 835"
   ----------

Actual results:

ypxfrd bound to some other port but not on static configured one.
=======
. # rpcinfo -p
program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper
100009 1 udp 1010 yppasswdd
100009 1 tcp 1010 yppasswdd
100007 3 udp 1017 ypbind
100007 2 udp 1017 ypbind
100007 1 udp 1017 ypbind
100007 3 tcp 1017 ypbind
100007 2 tcp 1017 ypbind
100007 1 tcp 1017 ypbind
100004 2 udp 834 ypserv
100004 1 udp 834 ypserv
100004 2 tcp 834 ypserv
100004 1 tcp 834 ypserv
600100069 1 udp 836 fypxfrd #<== different from static configured port
600100069 1 tcp 836 fypxfrd
=========

Expected results:

ypxfrd should bind to the port 835 as configured in "/etc/sysconfig/network"

Additional info:

• Also, tried with selinux in permissive mode but results were same in RHEL8.6

• I have tried to configure the same on RHEL7.9 to verify and observed that it is working as expected i.e bound to the static configured port:

• From RHEL7.9 testbox
  -------------------
  [root@nis ~]# cat /etc/redhat-release
  Red Hat Enterprise Linux Server release 7.9 (Maipo)

[root@nis ~]# cat /etc/sysconfig/network

1. Created by anaconda
   NISDOMAIN = nis.master.com
   YPSERV_ARGS="-p 834"
   YPXFRD_ARGS="-p 835" <=======

[root@nis ~]# getenforce
Permissive
[root@nis ~]# rpcinfo -p
program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper
100009 1 udp 788 yppasswdd
100007 2 udp 857 ypbind
100007 1 udp 857 ypbind
100007 2 tcp 860 ypbind
100007 1 tcp 860 ypbind
600100069 1 udp 835 fypxfrd <========
600100069 1 tcp 835 fypxfrd
100004 2 udp 834 ypserv
100004 1 udp 834 ypserv
100004 2 tcp 834 ypserv
100004 1 tcp 834 ypserv
[root@nis ~]#
-------------------