Setting Up the System Clock

System Clock

The system clock can be adjusted by choosing Configuration > Features > Device Administration > Administration > Clock, as shown in Figure 18-15. Select the appropriate time zone from the drop-down menu and adjust the system date by browsing through the monthly calendar. The system time can be adjusted by entering the time in the 24-hour format. In Figure 18-15, the system time is being adjusted to 5:05:05 a.m. on August 5, 2005 in the Eastern time zone. Click Apply to adjust the system clock.

Figure 18-15. Adjusting the System Clock

Example 18-6 displays the CLI commands to adjust the system clock that ASDM sends to the security Cisco ASA.

Example 18-6. Adjusting the System Clock via the CLI

clock timezone EST -5 0

clock summer-time EDT recurring 1 Sun Apr 2:00 last Sun Oct 2:00 60

clock set 5:5:5 AUG 5 2005

The system clock can be dynamically adjusted if an NTP server is specified on Cisco ASA. Set up an NTP server by choosing Configuration > Features > Device Administration > Administration > NTP. Click Add to enter a new NTP server and specify the IP address and the source interface information, as shown in Figure 18-16. If NTP authentication is being used, specify the authentication key and the key value. In this figure, a preferred NTP server located at toward the inside interface is defined with an authentication key number of 1 and a key value of csco.

Figure 18-16. Specifying an NTP Server

Example 18-7 shows the CLI commands that ASDM sends to the security Cisco ASA.

Example 18-7. Specifying an NTP Server via the CLI

ntp server key 1 source inside prefer

ntp authenticate

ntp authentication-key 1 md5 csco

Part I: Product Overview

Introduction to Network Security

Product History

Hardware Overview

Part II: Firewall Solution

Initial Setup and System Maintenance

Network Access Control

IP Routing

Authentication, Authorization, and Accounting (AAA)

Application Inspection

Security Contexts

Transparent Firewalls

Failover and Redundancy

Quality of Service

Part III: Intrusion Prevention System (IPS) Solution

Intrusion Prevention System Integration

Configuring and Troubleshooting Cisco IPS Software via CLI

Part IV: Virtual Private Network (VPN) Solution

Site-to-Site IPSec VPNs

Remote Access VPN

Public Key Infrastructure (PKI)

Part V: Adaptive Security Device Manager

Introduction to ASDM

Firewall Management Using ASDM

IPS Management Using ASDM

VPN Management Using ASDM

Case Studies

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Cisco Asa(c) All-in-one Firewall, IPS, And VPN Adaptive Security Appliance
Cisco ASA: All-in-One Firewall, IPS, and VPN Adaptive Security Appliance
ISBN: 1587052091
EAN: 2147483647
Year: 2006
Pages: 231
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