I had upgraded to 2.0.3-RELEASE, but the issue still exists. Same log found in system log and portal auth log.
Jul 29 14:17:09 php[16361]: : The command '/sbin/ipfw pipe 20001 delete' returned exit code '1', the output was 'ipfw: rule 1: setsockopt(IP_DUMMYNET_DEL): Invalid argument'
Jul 29 14:17:09 php[16361]: : The command '/sbin/ipfw pipe 20000 delete' returned exit code '1', the output was 'ipfw: rule 1: setsockopt(IP_DUMMYNET_DEL): Invalid argument'
Jul 29 14:17:09 php[16361]: : The command '/sbin/ipfw pipe 20001 delete' returned exit code '1', the output was 'ipfw: rule 1: setsockopt(IP_DUMMYNET_DEL): Invalid argument'
Jul 29 14:17:09 php[16361]: : The command '/sbin/ipfw pipe 20000 delete' returned exit code '1', the output was 'ipfw: rule 1: setsockopt(IP_DUMMYNET_DEL): Invalid argument'
Jul 29 14:17:09 php[16361]: : The command '/sbin/ipfw pipe 20001 delete' returned exit code '1', the output was 'ipfw: rule 1: setsockopt(IP_DUMMYNET_DEL): Invalid argument'
Jul 29 14:17:09 php[16361]: : The command '/sbin/ipfw pipe 20000 delete' returned exit code '1', the output was 'ipfw: rule 1: setsockopt(IP_DUMMYNET_DEL): Invalid argument'
Jul 29 14:17:09 php[16361]: : The command '/sbin/ipfw pipe 20001 delete' returned exit code '1', the output was 'ipfw: rule 1: setsockopt(IP_DUMMYNET_DEL): Invalid argument'