net.ipv4.ip_local_port_range default should be 32768 60999

User uses a custom value and has code in the pattern.

  transp = svcudp_create(RPC_ANYSOCK);

But the value frequently is out of the range of net.ipv4.ip_local_port_range

  This should be a side effect of possibly non related behavior.

  User did rely on it working on RHEL6, where glibc did choose the value with:

       if ((sock = __socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)

but {{libtirpc }}basically has the code:

 /*
 * Dynamic port range as defined in RFC 6335 Section 6.
 * This range avoids all IANA-assigned service port
 * numbers.
 */
enum {
	LOWPORT		= 49152,
	ENDPORT		= 65534,
	NPORTS		= ENDPORT - LOWPORT + 1,
};

...
	port = (rand_r(&seed) % NPORTS) + LOWPORT;
	for (i = 0; i < NPORTS; ++i) {
		*portp = htons(port++);
		res = bind(fd, sap, salen);

in src/binddynport.c

  There is no easy workaround. The RHEL8 libtirpc package does not include the patch, or variant of  https://sourceforge.net/p/libtirpc/mailman/message/37667337/ that could be used as a way to set the ports to not be used.

  The proper fix might be to adapt the logic in the above patch to respect  net.ipv4.ip_local_port_range assuming this is the correct or expected behavior, otherwise, a different approach might be required.