Dear All, Recently, I'm realized that my openbsd firewall router was not usable anymore due to pf rules had changed by using carp and pfsync mechanism.
Here is my prove. I'm tried to reinstall the whole machine and plugged in the modem LAN cable to NIC card. All my written pf rules was flush and changed. This happen even without internet connection(No IP address assign). I'm suspected this is did by my ISP. I'm believed my openbsd machine was located same subnet with their machine. I'm even tried to disable carp protocol but my pf rules still get flushed out. How this can happen? How to prevent it? How my ISP can synchronize its pf rules to my machine without IP assign? I'm suspect they achieved at Layer 2 by using mac spoofing/mac target to my machine. net.inet.carp.allow=0 Please help. Very urgent. -- Linux
