HP StorageWorks 1606 Brocade Fabric OS Administrator's Guide v6.3.0 (53-100133 - Page 182

7 IP Filter policy For every IP Filter policy, the two rules listed in Table 30 are always assumed to be appended implicitly to the end of the policy. This ensures that TCP and UDP traffic to dynamic port ranges is allowed, so that management IP traffic initiated from a switch, such as syslog, radius and ftp, is not affected. TABLE 30 Implicit IP Filter rules Source address Destination port Protocol Action Any 1024-65535 TCP Permit Any 1024-65535 UDP Permit A switch with Fabric OS v6.1.0 or later will have a default IP Filter policy for IPv4 and IPv6. The default IP Filter policy cannot be deleted or changed. When an alternative IP Filter policy is activated, the default IP Filter policy becomes deactivated. Table 31 lists the rules of the default IP Filter policy. TABLE 31 Default IP policy rules Rule number Source address Destination port Protocol Action 1 Any 2 Any 3 Any 4 Any 5 Any 6 Any 7 Any 9 Any 10 Any 11 Any 12 Any 22 TCP 23 TCP 897 TCP 898 TCP 111 TCP 80 TCP 443 TCP 161 UDP 111 UDP 123 UDP 600-1023 UDP Permit Permit Permit Permit Permit Permit Permit Permit Permit Permit Permit IP Filter policy enforcement An active IP Filter policy is a filter applied to the IP packets through the management interface. IPv4 management traffic passes through the active IPv4 filter policy, and IPv6 management traffic passes through the active IPv6 filter policy. The IP Filter policy applies to the incoming (ingress) management traffic only. When a packet arrives, it is compared against each rule, starting from the first rule. If a match is found for the source address, destination port, and protocol, the corresponding action for this rule is taken, and the subsequent rules in this policy are ignored. If there is no match, then it is compared to the next rule in the policy. This process continues until the incoming packet is compared to all rules in the active policy. If none of the rules in the policy matches the incoming packet, the two implicit rules are matched to the incoming packet. If the rules still do not match the packet, the default action, which is to deny, is taken. When the IPv4 or IPv6 address for the management interface of a switch is changed through the ipAddrSet command or manageability tools, the active IP Filter policies automatically become enforced on the management IP interface with the changed IP address. 140 Fabric OS Administrator's Guide 53-1001336-01