Submitted by
guvnor on Thu, 09/15/2011 - 13:05
Introduction
If you administer networks or unix based servers it most likely won't have escaped your attention that the commonly used remote admin protocol "Telnet" is not a secure protocol. It transmits your "traffic" in plain text and becasue of this could be captured or sniffed. This is especially bad news as passwords can be captured. Cisco IOS device support telnet and in years gone by it was the default method for remote administration of these devices. Nowadays you can enable SSH which stands for "secure shell".
Submitted by
guvnor on Sat, 06/25/2011 - 13:19
Yes you can
I have done it - the usual rules of keeping the firmware at the same version applies. However other than that you can mix the "v1s" (not sure if they are called that), with the newer V2s.
Submitted by
guvnor on Tue, 03/01/2011 - 12:55
Introduction
Once upon a time Cisco Access Lists were very very clunky and crude. The were a pig to manipulate and something to be avoided. Things have improved over the years and they are not so bad as they once were. For example there was a time when you wanted to alter an already applied access list you had to remove it then readd the entire list lock stock and barrel.
Introduction
Ever had that frustrating problem where you cannot connect to your Cisco ASA using the ASDM? Normally downgrading or upgrading your installing your Java on your machine will resolve it. However sometimes that doesn't do the trick. This document shows you another possible fix to the damn nuisance (apart from using the CLI of course)!
If you try and connecting using the Javaclient or the borwser to connect you will get a message telling you you were unable to connect.
Submitted by
guvnor on Sun, 12/26/2010 - 11:48
Submitted by
guvnor on Tue, 09/28/2010 - 14:47
Introduction
If you have to perform the same operation on a group of ports with a Cisco switch such as adding them to a vlan it can be a chore having to do it one interface at a time. There is a command called "range" which allows you to configure a range of ports at once. This example shows you how to do this.
Enter in config mode
Enter your switches configuration mode using the standard command of "Configure Terminal" or the abbreviated command "conf term"
Note! You have to be in enable mode to run configuration commands.
Submitted by
guvnor on Mon, 08/02/2010 - 09:02
If you have forgotten the enable password to a Cisco 1800 series router you will need to recover it. This document discusses how to do that.
Requirements
Physical access to the router
A PC with a Serial Port
A Cisco rollover / console cable (the blue type)
A copy of Hyper-terminal or Putty. Hyper-terminal comes with windows and putty is a free download. For this article I will use putty.
Step 1.
Plug the Cisco console cable from your PC's serial port to the console port of the Cisco 1800.
Submitted by
guvnor on Wed, 02/17/2010 - 13:33
Introduction
This article will guide you through the process of setting up a Cisco 1801 ADSL router to a BT broadband circuit. It will probably work on other POTS ADSL suppliers as well.
Beginning the configuration
Starting with a fresh router lets begin by setting up our local inside interface. This is going to be FastEthernet0. We are going to assign this interface an address of 192.168.128.1. To do this from the routers command prompt enter the following commands:
Firstly if you are not already in configuration mode enter it by the following command:
Submitted by
guvnor on Fri, 02/12/2010 - 12:15
Introduction
As you probably are aware the Cisco ASA is the successor to the Cisco PIX. If you are like me you are used to using the "debug packet" command for doing a lot of your connectivity trouble shooting. With the ASA you can use a command which is similar (albeit improved) version of the debug packet called "capture". As well as the new capture command the Cisco ASA also has a graphic logging tool known as the Cisco ASA ASDM logging tool.
Submitted by
guvnor on Thu, 12/03/2009 - 12:49
Cisco IOS "do" command
When you are configuring a cisco router you are in config mode. Often you need to check what you are doing and that means leaving config mode and entering into priviledged mode. This can be a pain in the neck. Users of Cisco Pix and Cisco ASAs have don't have to do this. Pix and ASA users can run commands like
show run when in config mode.
Well there is some good news - if you run IOS 12(8) or later you will find you have a new command called "do".
