Category Archives: Networks

Networks

Cracking Cisco Type 7 passwords by hand

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Although you should be using MD5 or SHA256 for password security, Type 7 passwords are still in use and so I thought this would be a fun learning exercise.

The ‘service password-encryption‘ or Type 7 password is based on a known proprietary weak encryption algorithm using XOR and can be recognized in the configuration file as,

password 7 030752180500

Note: Type 5 uses MD5 and looks similar to this,

enable secret 5 $1$OB1J$tNsFgEZ4kD1qituaAeYfa0

There are plenty of scripts or websites that can crack Type 7 passwords in less than a second, including one on Cisco’s website. This example will show how this can be done with just pen and paper. Continue reading Cracking Cisco Type 7 passwords by hand →

Networks

Basic Cisco ASA firewall setup

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There are many different firewall options out there, but one of the most prevalent seems to be the Cisco ASA. This post is a basic configuration outline of the general setup of an ASA firewall that has basic connectivity, as well as dynamic and static NAT functions. While there are many different services an ASA can provide, this post centers on an ASA configuration running on the 8.x code version doing only basic functions. This particular setup is on a firewall in routed mode, that is used for NAT/PAT with only an inside and outside interface setup.

The first config settings to enter on an ASA, or most any other Cisco networking devices is the hostname of the device, domain name, and the enable password for logging into privileged exec mode.


config t
hostname LabASA1
domain-name labasa1.yourdomain.com
enable password Secret1 Continue reading Basic Cisco ASA firewall setup →
Networks, Uncategorized

Cisco archive command

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The Cisco archive command has been around for several years now and is still valid for smaller operations that are unable to afford or require a commercial software package to do the same thing.  Two of the main benefits include backing-up your configurations after changes and logging the commands that were executed by each user. The commands necessary to accomplish these tasks are fairly straightforward,


sw1# config t
sw1(config)# archive
sw1(config-archive)# path ftp://192.168.100.50/configs/sw1
sw1(config-archive)# write-memory
sw1(config-archive)# log config
sw1(config-archive-log-config)# logging enable Continue reading Cisco archive command →