Hi! I try to block some computers to acces my gateway based on MAC address. I use this ipfw rule: ipfw add 100 deny mac any xx:yy:aa:bb:cc:dd in via $private_interface With this i can block XP computers but not work with Win98. I dont understand what is happened! I try against different computer with win98 OS and i can't block it. Only messenger is blocked but navigation work well. Computers with WinXP OS is blocked succesfull. I believe as is an problem with TCP packets that comming from Win98 computers but i dont know how i can resolv this.
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