never try dude before until ccr1009 received. after installation, the log displayed all the TCP SYN input to the router local management ip. Dude can be used with default setting. some Ethernet interface flapped up/down, even can't control by winbox. after uninstall, CCR1009 went back to normal. 

I can't say that I have seen or heard of such problem caused by The Dude server package. If that is just test router then I would recheck this again with most recent v6.36rc build. If that does happen again then generate supout file before uninstalling the package and send it to support@mikrotik.com