Has anyone solved the problem with limiting the max number of connections that emule use. I even can’t drop emule’s KAD Network because it uses UDP which can’t be droped with /ip firewall rule forward add p2p=all-p2p action=drop. And why MTK can’t limit max number of UDP connectiond - only TCP…
Because there is no such thing. Or not like TCP connection 
As UDP doesn’t have the concept of a “connection”, you can’t limit the number of connections. You could only limit the bandwidth UDP packets are getting. But as KAD is using random port numbers - if I remember correctly - you would have to limit a rather broad range of ports to catch the KAD traffic, too. And this would most surely also hit other types of traffic using UDP - perhaps VoIP and the like…
So You say thet there is no simple solution to limit KAD and that MTK’s p2p limiting is not working with KAD?
That’s the way I’d interpret the docs and the facts I know… But it’s surely worth an e-mail to support@mikrotik.com in order to find out exactly (or perhaps have this added, if there’s some way to filter it)…
I just went to emules home page and find text that describes port usage of emule:
http://www.emule-project.net/home/perl/help.cgi?l=1&rm=show_topic&topic_id=122
I will try to block all of these ports, but the problem with limitting is still there…