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3. Enter a new hostname and alias, as applicable, then click Save.
Firewall
Administrators can configure the console server to act as a firewall. By default, three built-in
chains accept all INPUT, FORWARD and OUTPUT packets. Select the Add, Delete or Change
Policy buttons to add a user chain, delete user-added chains and to change the built-in chains
policy. Default chains can have their policy changed (Change Policy) to accept or drop, but
cannot be deleted. Clicking on the Chain Name allows you to configure rules for chains.
Firewall configuration is available by clicking on Network - Firewall. Separate but identical
configuration screens are available from either the IPv4 Filter Table or IPv6 Filter Table menu
options.
Only the policy can be edited for a default chain; default chain policy options are ACCEPT
and DROP.
When a chain is added, only a named entry for the chain is created. One or more rules must be
configured for a chain after it is added.
Configuring the firewall
For each rule, an action (either ACCEPT, DROP, RETURN, LOG or REJECT ) must be selected
from the Target pull-down menu. The selected action is performed on an IP packet that matches
all the criteria specified in the rule.
If LOG is selected from the Target pull-down menu, the administrator can configure a Log
Level, a Log Prefix and whether the TCP sequence, TCP options and IP options are logged in
the Log Options Section.
If REJECT is selected from the Target pull-down menu, the administrator can select an option
from the Reject with pull-down menu; the packet is dropped and a reply packet of the selected
type is sent.
Protocol options
Different fields are activated for each option in the Protocol pull-down menu.
If Numeric is selected from the Protocol menu, enter a Protocol Number in the text field.
If TCP is selected from the Protocol menu, a TCP Options Section is activated for entering
source and destination ports and TCP flags.
If UDP is selected from the Protocol menu, the UDP section is activated for entering source and
destination ports.
32 Cyclades™ ACS 6000 Advanced Console Server Installation/Administration/User Guide