[c-nsp] Stop IP Fragmentation attck

[Lukas Tribus]

> I am just looking some kind of 3rd option which can give us relief. I
> just wanted to know what exactly ACL fragments option does?

Roland already provided you a link to the ACL documentation specific
to IP fragments.

Do you have a specific question about that or do you just want us to
read that document for you and then give you a brief summary?