Re: ISPs are asked to block yet another port

[Jeff Kell]

The description by LURHQ is misleading.  Messenger is an RPC service. 
Typical pop-up spammers queried 135 (Windows RPC portmapper) to find the 
port number of the messenger service, then send the message to that 
port.  It turns out that messenger can "typically" be found on 1026.

And as was noted earlier, unconditionally blocking udp/1026 will cause
a lot of collateral damage when udp/1026 outbound is used as an 
ephemeral port for a legitimate UDP-based service (DNS, NTP, etc).

Jeff