Dell PowerEdge M910 Fabric OS Administrator’s Guide - Page 170

6 Telnet protocol ATTENTION The rule number assigned has to precede the default rule number for this protocol. For example, in the defined policy, the Telnet rule number is 2, therefore to effectively block Telnet, the rule number to assign must be 1. If you choose not to use 1, you will need to delete the telnet rule number 2 after adding this rule. Refer to "Deleting a rule to an IP Filter policy" on page 157 for more information on deleting IP filter rules. 6. Save the new ipfilter policy by typing the ipfilter --save command. 7. Verify the new policy is correct by typing the ipFilter --show command. 8. Activate the new ipfilter policy by typing the ipfilter --activate command. switch:admin> ipfilter --activate BlockTelnet 9. Verify the new policy is active (the default_ipv4 policy should be displayed as defined). switch:admin> ipfilter --show Name: BlockTelnet, Type: ipv4, State: defined Rule Source IP Protocol Dest Port 1 any tcp 23 2 any tcp 22 3 any tcp 22 4 any tcp 897 5 any tcp 898 6 any tcp 111 7 any tcp 80 8 any tcp 443 9 any udp 161 10 any udp 111 11 any udp 123 12 any tcp 600 - 1023 13 any udp 600 - 1023 Action deny permit permit permit permit permit permit permit permit permit permit permit permit Name: default_ipv4, Type: ipv4, State: defined Rule Source IP Protocol Dest Port 1 any tcp 22 2 any tcp 23 3 any tcp 897 4 any tcp 898 5 any tcp 111 6 any tcp 80 7 any tcp 443 8 any udp 161 9 any udp 111 10 any udp 123 11 any tcp 600 - 1023 12 any udp 600 - 1023 Action permit permit permit permit permit permit permit permit permit permit permit permit Unblocking Telnet 1. Connect to the switch through a serial port or SSH and log in as admin. 2. Type in the ipfilter --delete command. Refer to "Deleting a rule to an IP Filter policy" on page 157 for more information on deleting IP filter rules. 130 Fabric OS Administrator's Guide 53-1001763-02