In today's article, I'm going to quickly inform you about the Privileged EXEC command named "auto secure".
Network administrators (like you) use the "auto secure" command to secure the management and forwarding planes of a router.
Another way of saying it is, CCNAs use this command to secure a router by disabling common IP services which can be exploited by attackers to initiate network attacks. When the command is typed on a router, it takes the user (ccna) through a command line-interface (CLI) semi-interactive session (which is also known as the AutoSecure dialogue).
Below is the command's syntax:
auto secure [management | forwarding] [no-interact | full] [ntp | login | ssh | firewall | tcp-intercept]
As you can see, the command can use several "optional" keywords:
management - This (optional) keyword is used to only secure the management plane of a router.
forwarding - This (optional) keyword is used to only secure the forwarding plane of a router.
no-interact - A CCNA uses this (optional) keyword if he or she doesn't want to be prompted for any interactive configurations. (If this optional keyword is not used, the user will be shown the noninteractive configuration and the interactive configurations)
full - This (optional) keyword is used to indicate that the user (ccna) wants to be prompted for all interactive questions. (If this optional keyword is not used, the router will behave this way by default)
ntp - This optional keyword is used to specify the configuration of the Network Time Protocol (NTP) feature in the AutoSecure command line-interface (CLI).
login - This (optional) keyword is used to specify the configuration of the Login feature in the AutoSecure CLI.
ssh - This (optional) keyword is used to specify the configuration of the Secure Shell (SSH) feature in the AutoSecure CLI.
firewall - This (optional) keyword is used to specify the configuration of the firewall feature in the AutoSecure CLI.
tcp-intercept - And, this (optional) keyword is used to specify the configuration of the TCP-Intercept feature in the AutoSecure CLI.
Below is an example of the command being used:
Router>enable
Router#auto secure
--- AutoSecure Configuration ---
*** AutoSecure configuration enhances the security of the router, but it will not make it absolutely resistant to all security attacks ***
AutoSecure will modify the configuration of your device. All configuration changes will be shown. For a detailed explanation of how the configuration changes enhance security and any possible side effects, please refer to Cisco.com for Autosecure documentation. At any prompt you may enter '?' for help. Use ctrl-c to abort this session at any prompt.
As you can see, once the command is typed into the router, the user (ccna) is informed about the CLI semi-interactive session.
By Charles E Ross
Tuesday, September 1, 2009
Monday, August 31, 2009
CCNA Beginners - Its for you
For CCNA Beginners I highly recommend this CCNA PPT.
This material will be useful for easy understanding of Networking. Download it now.
Click Here:
http://www.4shared.com/file/129153577/d2c4c449/CCNA_interactive_Presentation.html
If you going to start CCNA study don't miss this.
This material will be useful for easy understanding of Networking. Download it now.
Click Here:
http://www.4shared.com/file/129153577/d2c4c449/CCNA_interactive_Presentation.html
If you going to start CCNA study don't miss this.
GNS3 Grapical Network Simulator
What is GNS3 ?
GNS3 is a graphical network simulator that allows simulation of complex networks.
To allow complete simulations, GNS3 is strongly linked with :
* Dynamips, the core program that allows Cisco IOS emulation.
* Dynagen, a text-based front-end for Dynamips.
* Pemu, a Cisco PIX firewall emulator based on Qemu.
GNS3 is an excellent complementary tool to real labs for Cisco network engineers, administrators and people wanting to pass certifications such as CCNA, CCNP, CCIP or CCIE.
It can also be used to experiment features of Cisco IOS or to check configurations that need to be deployed later on real routers.
This project is an open source, free program that may be used on multiple operating systems, including Windows, Linux, and MacOS X.
Features overview
* Design of high quality and complex network topologies.
* Emulation of many Cisco router platforms and PIX firewalls.
* Simulation of simple Ethernet, ATM and Frame Relay switches.
* Connection of the simulated network to the real world!
* Packet capture using Wireshark.
Important notice: users have to provide their own Cisco IOS to use with GNS3.
Below you can download GNS3, a network simulator for making topologies of routers (IOS) and firewalls (PIX). It is particularly useful for training to Cisco certifications (CCNA, CCNP, CCSP, CCVP or CCIE).
DOWNLOAD HERE
http://rapidshare.com/files/273959048/GNS3_with_tutorial.rar.html
Or
http://www.4shared.com/file/129149535/a7ba9b5/GNS3_with_tutorial.html
Do not use boson network simulator.
GNS3 is a graphical network simulator that allows simulation of complex networks.
To allow complete simulations, GNS3 is strongly linked with :
* Dynamips, the core program that allows Cisco IOS emulation.
* Dynagen, a text-based front-end for Dynamips.
* Pemu, a Cisco PIX firewall emulator based on Qemu.
GNS3 is an excellent complementary tool to real labs for Cisco network engineers, administrators and people wanting to pass certifications such as CCNA, CCNP, CCIP or CCIE.
It can also be used to experiment features of Cisco IOS or to check configurations that need to be deployed later on real routers.
This project is an open source, free program that may be used on multiple operating systems, including Windows, Linux, and MacOS X.
Features overview
* Design of high quality and complex network topologies.
* Emulation of many Cisco router platforms and PIX firewalls.
* Simulation of simple Ethernet, ATM and Frame Relay switches.
* Connection of the simulated network to the real world!
* Packet capture using Wireshark.
Important notice: users have to provide their own Cisco IOS to use with GNS3.
Below you can download GNS3, a network simulator for making topologies of routers (IOS) and firewalls (PIX). It is particularly useful for training to Cisco certifications (CCNA, CCNP, CCSP, CCVP or CCIE).
DOWNLOAD HERE
http://rapidshare.com/files/273959048/GNS3_with_tutorial.rar.html
Or
http://www.4shared.com/file/129149535/a7ba9b5/GNS3_with_tutorial.html
Do not use boson network simulator.
How To Select A Good CBT Video
Using CCNA video training is a great way to study for your CCNA. There are several advantages, including low cost and having a highly qualified virtual instructor to teach you the difficult networking concepts anytime and anywhere. You are able to repeat the virtual class as many times as you like, until you are able to understand. Here are 6 factors to consider when you are buying CCNA video training:
1. Instructor - There is a large variety of CCNA video training available on the market. The best ones are taught by highly qualified CCIE certified network engineers. These instructors typically have years of experience in the networking industry and are not only able to teach the material well, they can also share with you tips and tricks from an industry insider's perspective. Be sure to check the qualifications and experience of the instructor before getting any video training.
2. Quality of CCNA Video Training - The resolution of the videos are crucial to the learning experience. Although it is definitely not necessary to have high-definition video, they must be clear enough for you to be able to learn effectively. For example, if the video is demonstrating command line configuration, the resolution should be enough so that you can watch the commands being typed in and the corresponding results.
3. Formats - You should take note of the format of the training video to ensure that the video can be played on your computer. If if it's in an industry standard format such as AVI or WMV, this should present less issues when trying to play the video.
4. Bonuses - Some video packages include many valuable bonuses including videos and audio files which can be played on your iPod, transcriptions of the video training and included practice tests. The cost of these extras will definitely add up, should you need to purchase them separately. It's definitely a great boon if they are all included in the package for the same price.
5. Guarantee - Does the video package come with any guarantees? Although it's not guaranteed that you will pass the CCNA exam, CCNA video training can be rather expensive (when compared to a book) and it is always reassuring that you get a satisfaction guarantee. The guarantee period should also be at least a month long so you have time to use the training and evaluate it to see if it's a quality product.
6. Cost - How much does the training cost? A good training package need not be too expensive. There are many discount deals if you know where to look. A complete and good quality CCNA video training package can be purchased for under $400, often with many bonuses thrown in.
By Francis W Teo
1. Instructor - There is a large variety of CCNA video training available on the market. The best ones are taught by highly qualified CCIE certified network engineers. These instructors typically have years of experience in the networking industry and are not only able to teach the material well, they can also share with you tips and tricks from an industry insider's perspective. Be sure to check the qualifications and experience of the instructor before getting any video training.
2. Quality of CCNA Video Training - The resolution of the videos are crucial to the learning experience. Although it is definitely not necessary to have high-definition video, they must be clear enough for you to be able to learn effectively. For example, if the video is demonstrating command line configuration, the resolution should be enough so that you can watch the commands being typed in and the corresponding results.
3. Formats - You should take note of the format of the training video to ensure that the video can be played on your computer. If if it's in an industry standard format such as AVI or WMV, this should present less issues when trying to play the video.
4. Bonuses - Some video packages include many valuable bonuses including videos and audio files which can be played on your iPod, transcriptions of the video training and included practice tests. The cost of these extras will definitely add up, should you need to purchase them separately. It's definitely a great boon if they are all included in the package for the same price.
5. Guarantee - Does the video package come with any guarantees? Although it's not guaranteed that you will pass the CCNA exam, CCNA video training can be rather expensive (when compared to a book) and it is always reassuring that you get a satisfaction guarantee. The guarantee period should also be at least a month long so you have time to use the training and evaluate it to see if it's a quality product.
6. Cost - How much does the training cost? A good training package need not be too expensive. There are many discount deals if you know where to look. A complete and good quality CCNA video training package can be purchased for under $400, often with many bonuses thrown in.
By Francis W Teo
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