Which ones have you tried?Microsoft IAS is decent enough for some situations but without knowing what features you need and how many users you are supporting it's hard to make a recommendation.THere's always Cisco's own ACS 5.x appliances which are v...
Don't bother upgrading those devices. You are better off rewriting the policies for new ASAs and cleaning up the configs while you are at it. 6.x is very old now. I hope you don't have conduit statements but if you do there is a tool to convert the...
I'm not familiar with 8.3 specifically yet but the general rule of nat is if "nat-control" is enabled you need nat statements and if "no nat-control" is specified packets will traverse the firewall as long as they are permitted via the ingress ACL fr...
Another vote for Pacquet's book even though there is a command missing when configuring IPS via command line.This is more comprehensive: http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6586/ps6634/prod_white_paper0900aecd805c4ea8.html