Reset a Cisco Router to Factory Default Settings

There are currently two ways to reset a Cisco router or switch to factory default. Reference: http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/products_tech_note09186a00802017a1.shtml Method 1 This method uses the config-register 0x2102 command in global configuration mode. enable configure terminal config-register 0x2102 end write erase reload <do not save> Method 2 This method uses the config-register 0x2142 command in global configuration mode. enable… Read more »

Configure Encrypted Cisco Enable Password

There are two ways to configure an enable password on a Cisco device, the unsecured way or the encrypted way. Obviously one is also associated with the wrong way and the other isn’t! Add Encrypted Enable Password Log into your device prior to running these commands enable configure terminal enable secret PASSWORD Remove Plain Text… Read more »

Cisco “Exit Interface Failed Test” using SDM or CCP

Cisco “Exit Interface Failed Test” using SDM or CCP When doing Cisco connectivity tests, you can stumble upon vague error messages that leave you feeling a little inadequate. I encountered one recently when reconfiguring my Dialer0 outside interface for a DSL connection, it ended up being so simple so I thought I’d share it with… Read more »

How to block telnet and SSH on outside interface on Cisco routers

How to block telnet and SSH on outside interface on Cisco routers By default, a lot of Cisco routers allow Telnet and SSH on the outside interface, this can cause a large security risk of being brute force attacked. Ideally Telnet should be blocked completely as it is an unsecure protocol and SSH should only… Read more »