Avocent PM3000 User's Guide download pdf (Page 40)

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 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, an 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, an 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.

Field/Menu Option Definition

Source Port - or - Des-

tination Port

A single IP address or a range of IP addresses.

Table 3.3: Firewall Configuration - TCP and UDP Options Fields

32 Avocent PMPDU Installer/User Guide

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 116 117

No comments

Avocent PM3000 User's Guide Page 40