14 Apr
1998
14 Apr
'98
4:25 p.m.
Are we really concerned about being smurfed by a /30, or even a /27? The essential problem is backbone class-C's, especially those in NAPs where coordination is nearly impossible. Smaller subnets tend to be in small ISPs' or customers' networks, which don't pose a threat since they lack the bandwidth for an effective attack. Stephen Karl Denninger wrote:
The larger problem is that subnetted /24s still are wide open. This kind of filter won't block anything from their broadcast addresses, since they're not the .255 address.
-- Stephen Sprunk "Oops." Email: sprunk@paranet.com Sprint Paranet -Albert Einstein ICBM: 33.00151N 96.82326W