<filter name='testcase'> <uuid>f4b3f745-d23d-2ee6-218a-d5671611229b</uuid> <!-- allow incoming ICMP Echo Reply --> <rule action='accept' direction='in' priority='500'> <icmp type='0'/> </rule> <!-- allow outgoing ICMP Echo Request --> <rule action='accept' direction='out' priority='500'> <icmp type='8'/> </rule> <!-- drop all other ICMP traffic --> <rule action='drop' direction='inout' priority='600'> <icmp/> </rule> </filter>