tailieunhanh - Common Firewall Management Tasks

Doing so includes changing the default administrative password, configuring the default gateway, configuring the IP addresses for the internal and external (and possibly other) interfaces, | Common Firewall Management Tasks One of the first things to accomplish when deploying a new firewall whether this is for an enterprise deployment or for a deployment in a small office or home office is to configure some basic aspects of networking. Doing so includes changing the default administrative password configuring the default gateway configuring the IP addresses for the internal and external and possibly other interfaces and configuring the logging of messages from the firewall. In addition to these tasks the firewall administrator must also manage the configuration of the firewall over time. Doing so may require the use of a change control system such as the Revision Control System RCS which is available both on the UNIX Linux platforms as well as the Windows platform. The following sections discuss each of these tasks in more detail. Initial Configuration The initial configuration of a firewall requires several items of information. This information includes both the internal and external interface IP addresses or the use of DHCP on one of those interfaces the next-hop gateway logging and an administrative password. The first three items are discussed in the following paragraphs. A discussion of administrative passwords was provided earlier in the Default Passwords section. Interfaces Most small office home office SOHO firewalls have only two interfaces. On enterprise firewalls there can be well over a half dozen interfaces that comprise various demilitarized zones DMZ with varying levels of security. In addition newer enterprise firewalls can also support VLANs and filtering between VLANs while only having a limited number of physical interfaces. All firewalls have at least two interfaces Inside The inside interface is typically assigned a static IP address and this IP address typically comes from one of the three private IP address 8 or 16but this is not a hard requirement . This interface serves as a

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