A bit back I decided that I should investigate following the Cisco Certification path. The lower levels aren’t hard, but all things considered, you really need to have a “test lab” of equipment to play with. So a few weeks ago I was offered a pair of old Cisco 2600 series routers on the cheap, and decided to pick them up. Around that time I also acquired myself a number other old Cisco devices including some PIX, switches, and a 3600 series router. The problem is, they all had passwords and I didn’t know any of them. Turns out it is super easy to reset routers in the 2600, 2800, 3600, and 3800 series back to the factory default.
If you regularly use SSH/Telnet from Windows, you probably use PuTTY. If you don’t use PuTTY, you either should, or your paying too much. Anyways, if you use it a fair amount you probably have saved sessions. While PuTTY doesn’t have an internal mechanism for backing up these settings, it turns out it is very easy. All the settings are stored in the registry. There are two easy methods if you want to back them up (which is always good to do). Afterward you can reload them onto another machine, should you need/desire to do so: