upgrade asa 8.25 to 8.4

[vatter]

I am trying to upgrade our ASA5520(Primary/Standby) to 8.45.

Can i upgrade 8.25 directly to 8.45 or do i have to upgrade to 8.3 first?                  

[Ramraj Sivagnanam Sivajanam]

Hi Bro

Yes, you'll need to upgrade your software image from 8.2.5 --> 8.3.1 --> 8.4.5

Please note that you've enough RAM and FLASH size for this.

Please note once you've moved to 8.3.X and above, the NAT syntax changes completely.

http://www.cisco.com/en/US/docs/security/asa/asa84/release/notes/asarn84.html#wp533919

Good Luck!

Regards,

Ram