Cisco 3140 Erste Schritte - Seite 34

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Configuring Security Policies

Changes are not active on the device until you deploy them. See

What to do next

Click Policies in the main menu and configure the security policy for the system. You can also click Objects

to configure the objects needed in those policies.

Configuring Security Policies

Use the security policies to implement your organization's acceptable use policy and to protect your network

from intrusions and other threats.

Procedure

Step 1

Click Policies.

The Security Policies page shows the general flow of a connection through the system, and the order in which

security policies are applied.

Step 2

Click the name of a policy and configure it.

You might not need to configure each policy type, although you must always have an access control policy.

Following is a summary of the policies:

• SSL Decryption—If you want to inspect encrypted connections (such as HTTPS) for intrusions, malware,

• Identity—If you want to correlate network activity to individual users, or control network access based

• Security Intelligence—Use the Security Intelligence policy to quickly drop connections from or to

• NAT (Network Address Translation)—Use the NAT policy to convert internal IP addresses to externally

• Access Control—Use the access control policy to determine which connections are allowed on the

• Intrusion—Use the intrusion policies to inspect for known threats. Although you apply intrusion policies

Getting Started

and so forth, you must decrypt the connections. Use the SSL decryption policy to determine which

connections need to be decrypted. The system re-encrypts the connection after inspecting it. See

Configuring SSL Decryption

on user or user group membership, use the identity policy to determine the user associated with a given

source IP address. See

Configuring Identity

selected IP addresses or URLs. By blocking known bad sites, you do not need to account for them in

your access control policy. Cisco provides regularly updated feeds of known bad addresses and URLs

so that the Security Intelligence block lists update dynamically. Using feeds, you do not need to edit the

policy to add or remove items in the block lists. See

routeable addresses. See

Configure

network. You can filter by security zone, IP address, protocol, port, application, URL, user or user group.

You also apply intrusion and file (malware) policies using access control rules. Use this policy to

implement URL filtering. See

using access control rules, you can edit the intrusion policies to selectively enable or disable specific

intrusion rules. See

Intrusion

Policies.

Configuring Security

NAT.

Configuring the Access Control

Policies.

Deploying Your Changes, on page

Intelligence.

Policy.

Getting Started

35.