To set the time on the router, use the clock set time command. Configure R2 as the NTP master using the ntp master stratum-number command in global Issue the debug ntp all command to see NTP activity on R1 as it synchronizes with R2.
b. To set the time on the router, use the clock set time command.
R2 clock set 20:12:00 Dec 17 2008 R2 Dec 17 20:12:18.000: SYS-6-CLOCKUPDATE: System clock has been updated from 01:20:26 UTC Mon Dec 15 2008 to 20:12:00 UTC Wed Dec 17 2008, configured from console by admin on console.c. Configure R2 as the NTP master using the ntp master stratum-number command in global
configuration mode. The stratum number indicates the distance from the original source. For this lab, use a stratum number of 3 on R2. When a device learns the time from an NTP source, its stratum number becomes one greater than the stratum number of its source. R2config ntp master 3 Step 2: Configure R1 and R3 as NTP clients using the CLI. a. R1 and R3 will become NTP clients of R2. To configure R1, use the global configuration command ntp server hostname. The host name can also be an IP address. The command ntp update- calendar periodically updates the calendar with the NTP time. R1config ntp server 10.1.1.2 R1config ntp update-calendar b. Verify that R1 has made an association with R2 with the show ntp associations command. You can also use the more verbose version of the command by adding the detail argument. It might take some time for the NTP association to form. R1 show ntp associations address ref clock st when poll reach delay offset disp ~10.1.1.2 127.127.1.1 3 14 64 3 0.000 -280073 3939.7 sys.peer, selected, +candidate, -outlyer, x falseticker, ~ configuredc. Issue the debug ntp all command to see NTP activity on R1 as it synchronizes with R2.
R1 debug ntp all NTP events debugging is on NTP core messages debugging is on NTP clock adjustments debugging is on NTP reference clocks debugging is on CCNA Security All contents are Copyright © 1992 –2012 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 23 of 57 NTP packets debugging is on Dec 17 20.12:18.554: NTP message sent to 10.1.1.2, from interface Serial000 10.1.1.1. Dec 17 20.12:18.574: NTP message received from 10.1.1.2 on interface Serial000 10.1.1.1. Dec 17 20:12:18.574: NTP CoreDEBUG: ntp_receive: message received Dec 17 20:12:18.574: NTP CoreDEBUG: ntp_receive: peer is 0x645A3120, next action is 1. Dec 17 20:12:18.574: NTP CoreDEBUG: receive: packet given to process_packet Dec 17 20:12:18.578: NTP CoreINFO: system event event_peerstrat_chg 0x04 status sync_alarm, sync_ntp, 5 events, event_clock_reset 0xC655 Dec 17 20:12:18.578: NTP CoreINFO: synchronized to 10.1.1.2, stratum 3 Dec 17 20:12:18.578: NTP CoreINFO: system event event_sync_chg 0x03 status leap_none, sync_ntp, 6 events, event_peerstrat_chg 0x664 Dec 17 20:12:18.578: NTP CoreNOTICE: Clock is synchronized. Dec 17 20:12:18.578: NTP CoreINFO: system event event_peerstrat_chg 0x04 status leap_none, sync_ntp, 7 events, event_sync_chg 0x673 Dec 17 20:12:23.554: NTP: Calendar updated.d. Issue the undebug all or the no debug ntp all command to turn off debugging.
Parts
» CCNA Security 1.1 Instructor Lab Manual
» Lab A: Researching Network Attacks and Security Audit Tools
» Lab A: Securing the Router for Administrative Access
» Use the username command to create the user ID with the highest possible privilege level and a
» Issue the undebug all or the no debug ntp all command to turn off debugging.
» Click OK in the Commands Delivery Status window.
» Use the show logging command to see the type and level of logging enabled.
» Save the running config to the startup config using the copy run start command.
» Lab A: Securing Administrative Access Using AAA and RADIUS
» Click Send and you should see a Send Access_Request message indicating the server at
» Clear the log on the WinRadius server by choosing Log Clear from the main menu.
» Lab A: Configuring CBAC and Zone-Based Firewalls
» Issue the show run command to review the current basic configuration on R1.
» Display the Extended ACL named autosec_firewall_acl, which is applied to S000 inbound.
» Display the Extended ACL named autosec_firewall_acl that is applied to S000 inbound.
» Click Finish to complete the Firewall wizard.
» Lab A: Configuring an Intrusion Prevention System IPS Using the CLI and CCP
» From the R1 CLI, verify that the directory is present using the dir flash: or dir flash:ipsdir
» Apply the IPS rule to an interface with the ip ips name direction command in interface
» Verify connectivity between R1 and PC-A, the TFTP server, using the ping command.
» Use the show ip ips all command to see an IPS configuration status summary. To which
» For Protocol, select tftp from the drop-down menu. Enter the IP address of the PC-C TFTP server
» Lab A: Securing Layer 2 Switches Instructor Version
» From the router R1 CLI, use the show interface command and record the MAC address of the
» Set the SPAN source interface using the monitor session command in global configuration mode.
» Lab A: Exploring Encryption Methods Instructor
» Lab A: Configuring a Site-to-Site VPN Using Cisco IOS and CCP
» Verify the IKE policy with the show crypto isakmp policy command.
» Save the running config to the startup config for R1 and R3 using the copy run start command.
» Click the Launch the selected task button to begin the CCP Site-to-Site VPN wizard.
» Lab B: Configuring a Remote Access VPN Server and Client
» In the Command Delivery Status window, click OK. How many commands are delivered? 103 with
» Lab C Optional: Configuring a Remote Access VPN Server and Client
» Lab A: Security Policy Development and Implementation
» Verify that R1 and R3 have made an association with R2 using the show ntp associations
» Choose FastEthernet 01 as the Inside Trusted interface and Serial 001 as the Outside Untrusted
» From PC-A, Telnet to R2 at IP address 10.1.1.2 using the vty line password ciscovtypass.
» If the ipsdir directory is not listed, create it.
» Secure the router running configuration and securely archive it in persistent storage flash.
» Lab A: Configuring ASA Basic Settings and Firewall Using CLI
» Display the ASA file system using the show file system command to determine what prefixes are
» Display the current running configuration using the show running-config command.
» You can configure the ASA to accept HTTPS connections using the http command. This allows
» Issue the show route command to display the ASA routing table and the static default route just
» Save the RSA keys to persistent flash memory using either the copy run start or write mem
» Lab B: Configuring ASA Basic Settings and Firewall Using ASDM
» View this Access Rule in ASDM by choosing Configuration Firewall Access Rules. It appears
» Lab C: Configuring Clientless and AnyConnect Remote Access SSL VPNs Using ASDM
» Enable HTTP access to R1 using the ip http server command in global config mode. Also set
» From the Add Bookmark List window, click Add to open the Add Bookmark window. Enter Web Mail as
» Lab D: Configuring a Site-to-Site IPsec VPN Using CCP and ASDM
» Use the reload command to restart the ASA. This will cause the ASA to come up in CLI Setup
» In the Peer Identity section, select Peer with static IP address and enter the IP address of the
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