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ASA5510 Upgrade Path

I have an HA pair of 5510's that are way behind on updates.  They currently only have 256 MB of memory, so I am considering the upgrade path below.  Does anyone see any issues with this?  is there anything with my current config that may not work correctly after all these updates?  Thanks for the help. 

8.0.5 - Current

Update to 8.2.5

Upgrade Memory to 1 GB each

Update to 8.3.2

Update to 8.4.7

Update to 9.0.3

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ASA5510 Upgrade Path

Keep in mind that the 1GB memory is a minimum requirement.

Other than that the upgrade path is fine.

As for configuration.  Once you upgrade to 8.3 all NAT and your outside to inside ACLs will break and need to be reconfigured.  As of 8.3 and higher NAT is based on object groups, and ACLs require the real IP to be specified and not the NATed IP.

Other than that, you should be all good.

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