I have a pix 501 running IOS 6.3(5) and Device manager 3.0(4). Is it possible to upgrade the software and is it wise to do? Thanks Bob
Hi Rob, unfortunately you cannot upgrade passed 6.3.5 last version in the 6.3 train for this model..
if you want to upgrade to code 7.x above you will neeed to upgrade to asa, asa5505 would be its upgrade path model.