if just as the top man said ,i would believe that your end user's computer just have some kinds of virus ,maybe microsoft blaster,You can deny the port number,135,139,445,4444 just using the ACL.
and in addition,You can prohibit the icmp packet in your router or MLS.
Hope for help.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.