Netgear ADSL Firewall Router DG834 User Manual download pdf (Page 49)

Reference Manual for the ADSL Firewall Router DG834

Protecting Your Network 4-5

202-10005-05, June 2005

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Firewall Rules

Firewall rules are used to block or allow specific traffic passing through from one side of the router

to the other. Inbound rules (WAN to LAN) restrict access by outsiders to private resources,

selectively allowing only specific outside users to access specific resources. Outbound rules (LAN

to WAN) determine what outside resources local users can have access to.

A firewall has two default rules, one for inbound traffic and one for outbound. The default rules of

the DG834 are:

• Inbound: Block all access from outside except responses to requests from the LAN side.

• Outbound: Allow all access from the LAN side to the outside.

You can define additional rules that will specify exceptions to the default rules. By adding custom

rules, you can block or allow access based on the service or application, source or destination IP

addresses, and time of day. You can also choose to log traffic that matches or does not match the

rule you have defined.

You can change the order of precedence of rules so that the rule that applies most often will take

effect first. See “Order of Precedence for Rules” on page 4-11 for more details.

To access the rules configuration of the DG834, click the Firewall Rules link on the main menu,

then click Add for either an Outbound or Inbound Service.

Figure 4-4: Rules menu

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Netgear ADSL Firewall Router DG834 User Manual Page 49