Transparent Firewall is a feature that was introduced on 7.X, so if you need to have this feature you might want to get your firewall to 7.X version, be sure to read all the 7.X release notes prior to making the decision to upgrade it. As for DDOS the PIX within it's 6.X 7.X and 8.X has some built in features like tcp intercept syn flood protection and so on, you might want to be more specific as to what exactly you need.
First you need to check on the release notes if you have the needed RAM to upgrade, then you need to be aware that changing from 6.X to 7.X is a major change commands are used differently, after you have decided whether you will upgrade or not, you need to set a tftp server with the image of the 7.X and perform the command "copy tftp flash" following the lead of the command. I strongly advise you to read the release notes prior to doing this.
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...