Set Broadcast Address For Web Sharing


Period A (old)
I have 2 macs in a LAN. Addresses

Period B (now)
The same 2 macs but connected through ADSL with static IP. I needed to redefine the local (LAN) addresses: Now (with gateway I did this in the Sys Prefs. OK. However, the system in Network Utility still shows as Broadcast Address the old IP ( while the System Profiler shows as the Mac address the new. How can I change this?