63.0.0.0 255.0.0.0
�-----Original Message-----
�From: [EMAIL PROTECTED]
�[mailto:[EMAIL PROTECTED]]On Behalf Of dk
�Sent: Sunday, December 10, 2000 9:00 PM
�To: [EMAIL PROTECTED]
�Subject: RE: [IMail Forum] server attack-- blocking ip addresses
�
�
�
�How would I totaly block
�
�63.xx.xx.xx ??
�
�
�
�
�
�>
�>
�> > If an Ip address that I want to block are for example
�>
�> > 63.20.67.64 63.20.63.138
�>
�> > How would I block all 254 systems?
�> > Would I use 63.20.60.0 for the ip to block and
�255.255.255.0 for the
�> subnet?
�>
�> Actually, the example above would be 65,536 IPs (63.20.x.x).
�>
�> If you wanted to block all IPs from 63.20.67.x, you would use
�> 63.20.67.0 and
�> a netblock of 255.255.255.0.
�>
�> If you wanted to block all IPs from 63.20.67.x and 63.20.63.x,
�> you would use
�> 63.20.67.0 with a netblock of 255.255.255.0 *and* 63.20.63.0 with
�> a netblock
�> of 255.255.255.0.
�>
�> If you want to block all IPs from 63.20.x.x, you would use
�63.20.0.0 and a
�> netblock of 255.255.0.0. But, that will block a lot of computers
�> -- be sure
�> to look up to see what companies own those IP addresses
�before doing that.
�> It could be that you are blocking lots of small ISPs, for
�> example, or small
�> businesses with class Cs. In reality, it appears that those
�are both IPs
�> from a huge block of IPs that UUNet uses for dialup
�accounts. Blocking
�> those will block lots of people (although probably mostly
�dialups, which
�> wouldn't be much of a problem, unless they have static IPs).
�> -Scott
�>
�> Declude: Anti-spam and Anti-virus solutions for IMail.
�> http://www.declude.com
�>
�>
�>
�>
�> Please visit http://www.ipswitch.com/support/mailing-lists.html
�> to be removed from this list.
�>
�> An Archive of this list is available at:
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�>
�>
�
�
�PS- Come by http://florida.com for all your Florida needs!!
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