This is an excellent guide to understanding IP addresses..... http://www.3com.com/other/pdfs/infra/corpinfo/en_US/501302.pdf
shawn > Hello Debian, > > I want to block all ip's ending in 224 to 255 but not 220 and others > searching the net I found I need to add "/27" to end of the ip. > I understand /8 /16 /24 /32 somewhat but... > > My question: what makes /27 significant > X.Y.Z.224 - X.Y.Z.255 > deny from 63.148.99.224/27 > > Thanks > P.s. for example, how would I block only X.Y.Z.23 - X.Y.Z.55 ??? > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact > [EMAIL PROTECTED]
