Apparently a big stupid who is believed Keving Mitnik is register and erase the section firewall of the wiki of routeros. I have the hope that the admin are done some back up, since was very good articles.
I agree with the idiot assessment…and not much of a hacker either. Here is the Firewall section before he/she deleted it.
http://wiki.mikrotik.com/index.php?title=Firewall&oldid=8415
You can find the previous changes under the “history” tab in the Wiki.
It also shows the real login id of the hacker. Duh!!
ADD: I would change it back, but I think normis or one of the other MikroTik crew should see it. I will imagine it will suck to be ‘Eng Ma7mod’. I hope they just remove the entries and it will go back to normal.
well… very clever 
yes it is so
and everything have been changed to normal