Cisco Systems 4.2 manual IP Address Ranges table contains ten rows for configuring

Models: 4.2

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Chapter 5 Password Policy Configuration Scenario

Step 4: Configure Access Policy

 

Table 5-1

Access Policy Options (continued)

 

 

 

 

 

 

 

Option

 

Description

 

 

 

 

 

 

Reject connections from listed IP

Restricts remote access to the web interface to IP addresses

 

 

addresses

 

outside of the specified IP Address Ranges.

 

 

 

 

IP filtering operates on the IP address received in an HTTP

 

 

 

 

request from a remote administrator's web browser. If the

 

 

 

 

browser is configured to use an HTTP proxy server or the

 

 

 

 

browser runs on a workstation behind a network device

 

 

 

 

performing network address translation, IP filtering applies only

 

 

 

 

to the IP address of the HTTP proxy server or the NAT device.

 

 

 

 

 

 

IP Address Ranges

The IP Address Ranges table contains ten rows for configuring

 

 

 

 

IP address ranges. The ranges are always inclusive; that is, the

 

 

 

 

range includes the Start and End IP addresses.

 

 

 

 

Use dotted-decimal format. The IP addresses that define a range

 

 

 

 

must differ only in the last octet (Class C format).

 

 

 

 

 

 

Start IP Address

Defines the lowest included IP address in the specified range (up

 

 

 

 

to 16 characters).

 

 

 

 

 

 

End IP Address

Defines the highest included IP address in the specified range (up

 

 

 

 

to 16 characters).

 

 

 

 

 

 

 

 

 

HTTP Configuration

 

 

 

 

 

 

 

 

 

 

 

 

 

HTTP Port Allocation

 

 

 

 

 

 

 

 

 

 

Allow any TCP ports to be used for

Enables ACS to use any valid TCP port for remote access to the

 

 

Administration HTTP Access

web interface.

 

 

 

 

 

 

Restrict Administration Sessions to

Restricts the ports that ACS can use for remote access to the web

 

 

the following port range From Port

interface. Use the boxes to specify the port range (up to five

 

 

n to Port n

 

digits per box). The range is always inclusive; that is, the range

 

 

 

 

includes the start and end port numbers. The size of the specified

 

 

 

 

range determines the maximum number of concurrent

 

 

 

 

administrative sessions.

 

 

 

 

ACS uses port 2002 to start all administrative sessions. Port 2002

 

 

 

 

does not need to be in the port range. Also, ACS does not allow

 

 

 

 

definition of an HTTP port range that consists only of port 2002.

 

 

 

 

The port range must consist of at least one port other than port

 

 

 

 

2002.

 

 

 

 

 

 

 

A firewall configured to permit HTTP traffic over the ACS

 

 

 

 

administrative port range must also permit HTTP traffic through

 

 

 

 

port 2002, because this is the port that a web browser must

 

 

 

 

address to initiate an administrative session.

 

 

 

 

We do not recommend allowing administration of ACS from

 

 

 

 

outside a firewall. If access to the web interface from outside a

 

 

 

 

firewall is necessary, keep the HTTP port range as narrow as

 

 

 

 

possible. A narrow range can help to prevent accidental

 

 

 

 

discovery of an active administrative port by unauthorized users.

 

 

 

 

An unauthorized user would have to impersonate, or “spoof,” the

 

 

 

 

IP address of a legitimate host to make use of the active

 

 

 

 

administrative session HTTP port.

 

 

 

 

 

 

 

 

 

 

 

Configuration Guide for Cisco Secure ACS 4.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OL-14390-02

 

 

 

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Cisco Systems 4.2 IP Address Ranges table contains ten rows for configuring, Range includes the Start and End IP addresses

4.2 specifications

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