Does no ip directed broadcast really work?
Yes. It works. And it works for whatever your particular netmask or broadcast address happens to be, which is what's important. The only time you shouldn't do it globally is when some other network really needs to see broadcasts. For example, If we manage a client's network with HP OpenView over the internet, we need to be able to send them directed broadcasts, so that OpenView host discovery will work. Patrol works the same way, as do other products. In this case you can't use the "no ip directed broadcast" switch, but you can still set up access rules which do the same thing except for the permitted network. Bottom line is that you should protect your network from people who would either abuse it via smurfing, or simply have no business looking for hosts on your network. You have the tools to do it. --Dean ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Plain Aviation, Inc dean@av8.com LAN/WAN/UNIX/NT/TCPIP/DCE http://www.av8.com We Make IT Fly! (617)242-3091 x246 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++