The title of your post is about erase username and password, but the text of your post indicates that you have forgotten the name and password. What you need to do is to execute the password recovery feature. The basics of the password recovery procedure are that you set the config register to 0x2142 so that the router bypasses the config file. Then you can get into enable mode, you copy the config from startup-config to running-config, and then you can recreate the username with a password that you will remember. Be careful to set the config register back to its original value when you are done.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...