I found something like this:
you-experience-issues-with-udp-dependent-network-services-after-you-install-dns-server-service-security-update-953230-ms08-037-ee8a0d5f-c6eb-7020-4c88-455369acf194 https://support.microsoft.com/en-us/topic/you-experience-issues-with-udp-dependent-network-services-after-you-install-dns-server-service-security-update-953230-ms08-037-ee8a0d5f-c6eb-7020-4c88-455369acf194
"The implementation of the DNS server security update reserves a set of ports when randomizing queries. This design decision was made to address performance concerns for DNS servers that handle and originate a significantly larger number of queries compared to Windows-based clients. The set of reserved ports by the DNS Server is referred to from here onward as a "socket pool."
The default size of the socket pool on Windows-based servers is 2,500 sockets."
Could anyone that have domain dns server, enter: netstat -ano and check if you have the same?