Cisco Ccna (640-553) Security Exam Training: Using The “banner” Command
In today’s article, I’m going to quickly inform you about the Cisco IOS Global configuration command named “banner”.
CCNAs (like you) use the “banner” command to configure an extended authentication (Xauth) banner string under a group policy definition.
Below is the command’s syntax:
banner c {banner-text} c
As you can see, the command is extremely easy to implement, and by the way, just in case if you were wondering; the letter “c” is the Delimiting character.
The “Delimiting character” can be any character that is not part of the banner-text.
And, the “banner-text” is the string of characters that makes up the banner. The maximum number of characters that can be used is 1024.
Below is an example of the command being used:
Router>enable
Router#configure terminal
Router(config)#crypto isakmp client configuration group MYVPN
Router(config-isakmp-group)#banner @ The quick fox jumped over the lazy dog @
Router(config-isakmp-group)#end
Router#copy run start
As you can see in the example above, the delimiting character is the “@” sign; and notice that there is a space in between the word “banner” and the first delimiting character, followed by the banner text (The quick fox jumped over the lazy dog), then the second occurrence of the delimiting character to end the banner text.
And, if you need to remove the banner text you’ve created; all you have to do is type the word “no” in front of the banner-text like you see below.
Router(config)#no @ The quick fox jumped over the lazy dog @
Notice, that the delimiting character is still being used (in front and back) to remove the banner text.
By the way, if you decide to use the command, make sure your router(s) is running Cisco IOS 12.4(2)T or higher.
I hope this article was very informative and helped you quickly understand the usage of the banner command. If you need to learn more; I suggest you visit my website, were you’ll find the latest information regarding the Cisco CCNA (640-553) Security exam techniques.
Charles Ross, CCNP #CSCO10444244 is the owner of Ittechtips.com; where you'll find free comprehensive information and videos on how to pass the CCNA (640-553) security exam.
Sign-Up for "100 Free Videos" and, also learn more about the new "Cisco CCNA (640-553) Video Accelerated Training Course" at his website. www.ccnaittechtips.com
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