摘要：A firewall is a device or so ftware that con tro ls the traffic o f a netwo rk . Unfortun ately, a firewall h asalso its weak nesses if not ins talled properly an d approp riate security policy is not imp lem en ted . Penetratinga firewall can sometimes cause the n etwork to be o ffline fo r sev eral ho urs or even day s (in case if anyd ata was mo dified ), so a method olog y is required in ord er to minim ize the d am ag e that can be o ccurredd uring the penetration testing of a firewall, a 4 -p hase metho dolo gy to perform a firewall penetration testingis given
