1b4ebec5bSDarren Reed# 2b4ebec5bSDarren Reed# For a network server, which has two interfaces, 128.1.40.1 (le0) and 3b4ebec5bSDarren Reed# 128.1.2.1 (le1), we want to block all IP spoofing attacks. le1 is 4b4ebec5bSDarren Reed# connected to the majority of the network, whilst le0 is connected to a 5b4ebec5bSDarren Reed# leaf subnet. We're not concerned about filtering individual services 6b4ebec5bSDarren Reed# or 7b4ebec5bSDarren Reed# 8b4ebec5bSDarren Reedpass in quick on le0 from 128.1.40.0/24 to any 9*c9bff7baSGuido van Rooijblock in log quick on le0 from any to any 10*c9bff7baSGuido van Rooijblock in log quick on le1 from 128.1.1.0/24 to any 11b4ebec5bSDarren Reedpass in quick on le1 from any to any 12