July 15th, 2010
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Enable secret passwords are hashed using the MD5 (Message Digest 5) algorithm instead of the weak Cisco proprietary algorithm. Enable secret passwords are not trivial to decrypt.
An “enable secret” password is configured using the following command:
cisco (config)#enable secret password
If you see a password in the configuration file with a ’5′ in the second to last field, that password is hashed using the MD5 algorithm. For example:
enable secret 5 $1$B8pH$PmmcMRoqfeEtQ7WxL865a0
Although MD5 is a strong algorithm, it may still be attacked with a dictionary attack or a brute force attack.
December 10th, 2009
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Tunnel Async Data
VER A 7/23/03
As an example, assume that async RS-232 devices are to be connected by leased line modems. Instead, the leased line modems are replaced with Cisco comm servers. Plug the RS-232 devices into async lines on the Cisco comm servers and connect the comm servers via an arbitrary topology IP network. In this sample configuration, one side is the caller and the other side is the called. It is presumed that the caller side is more persistent in its desire to send data.
Assumptions:
The caller side has an IP address of 10.224.8.3 and is using Line 2.
The called side has an IP address of 10.226.x.1 and is using Line 3.
December 3rd, 2009
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This document explains HOWTO use CentOS NetInstall to install CentOS using a FTP server.
Download : CentOS NetInstall and CentOS 5.4 DVD
CentOS NetInstall is basically installing from a very small downloaded ISO.
- Download CentOS NetInstall and burn it to a CD
- Download Cent)S 5.4 DVD and unzip it to c:\centos
- On your Windows machine install FileZilla (FileZilla Wiki)
- Create the following user “centos” with password “centos”
- Set the user Home Directory to c:\centos
- Now boot-up the server with the NetInstall CD
- Choose FTP option
September 14th, 2009
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AppSnap
AppSnap is an application that simplifies installation of software. It automatically figures out the latest version, downloads the installer and then installs the software in one seamless step. AppSnap is primarily designed for Windows which does not have any decent package manager such as APT and RPM as in the Linux world.
Features
* Detect latest and installed version of supported applications
* Download, install, upgrade and uninstall supported applications
* Uninstall applications registered with Add/Remove Programs facility
* Fully functional GUI and CLI supporting localization
* Manage installed and upgradeable applications
* Manage AppSnap updates from within itself
* Update growing application database from central repository
* Create single application repository to be used by AppSnap on an intranet
* Support proxy configurations
* Parallel downloads with progress information
* Filter applications by category and keywords
* Free and Open Source
September 8th, 2009
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If you know the MAC address use the following format:
sh cam 00-30-48-66-5A-D6
If you do not know the MAC address use the following to find it:
sh cam dynamic
If you know the VLAN and to make your search a little easier user the following:
sh cam dynamic 20
20 is the VLAN your machine is connected to.
