How to upgrade PIX 520 2MB flash firewall

[pikelner]

Hello,

This is my first post to Cisco forums. I've just bought a Cisco PIX 520 with a 2MB flash, 350MHz CPU, 128MB ram running IOS 4.4. How can I determine what the highest version of IOS I can upgrade to using the Cisco website. The firewall is licensed for 6 interfaces (unlimited) and has two nics. Also are the upgrades free or need to be bought (noticed there is a registration for a free 3DES license registration).

Thank you,

Frank

[mostiguy]

you need a support contract to download pix os updates. or, open a cco case for a known security vulnerability.

with the 2MB flash, the latest pix os you can run is 5.32, IIRC. You definitely cannot run the 6.x branch on that

[aacole]

Frank,

Your PIX can support upto version 5.1(x), higher versions require the flash card upgrade. I have a 520 with the 16 Meg flash card running the current 6.3, so it may be a good investment for you, depends on your application.

As for software availability, that depends on your support contract.

There is a chart at this URL which describes this in more detail.

http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_sw/v_52/relnotes/pixrn529.htm#xtocid3

[kvandermark]

Where on the Cisco site you can you find 5.1(x). I see 5.2 and higher available for download, but can't find anything older??? 5.1(x) plus the boot helper image is what I'll probably need. I have a 520 that's got a corrupted 2MB flash.