My boss put me in charge of getting our systems updated with the recent DNS poison patches. I got the proper patch from Cisco for my 1841, but how exactly do I apply it? I have worked in the Cisco IOS before, but just very basic stuff; setting up IP's, access lists, etc.
What do I need to do for this patch? Thanks
In the process that I have described there is no need to copy the config file. The config file is already on the PIX, you will be loading a new image onto the same system and it will use the existing config file. (note that sometimes a new version of the image may make some changes in the config file)
Having just said that it is not necessary to copy the config file, I will also note that it is frequently a good thing before starting any significant maintenance (such as a new image) to make sure that you have a good (current) copy of the config stored somewhere off the device. Whether the encrypted passwords will transfer depends on how you do the copy. many of us do a show run and copy and paste to get the config into a file. In doing this the encrypted passwords will not be saved. But if you do a copy with TFTP from the PIX to a TFTP server then the encrypted passwords are saved.