Fastest, tested, mostly free password recovery software with benchmarks and review
Hardware → Cisco IOS password recovery
Overview of Cisco IOS password protection:
There are two types of passwords stored in Cisco routers – type 5 and type 7. Passwords of the first type are encoded with the simple algorithm, and therefore can be decoded easily. As for the second type, they use many MD5 iterations and can be cracked by using brute-force only.
Cisco IOS crypto algorithms: proprietary / MD5 Cisco IOS encryption weakness: storing a key along with data / human factor Possible attacks against Cisco IOS: password decryption / brute-force Attacks complexity: 20 / 264