26 Feb
2016
26 Feb
'16
9:06 p.m.
The difference in blocking any of the existing ports on your list and blocking UDP/1900 is that the ports on your list are all registered ports. Port 1900 is not registered -
IANA is under the impression it's registered for SSDP. Do you have some reason to believe they're mistaken? http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?&page=34