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Upgrading ASA 5505

I will be upgrading a number of firewalls from 8.2(5) and 6.4(5) to 8.4(2) and 6.4(9). Will all of my current configurations be lost? I seem to remember that port forwarding acted different in the updated iOS. Will the forwarded ports and 1:1 NAT settings stop working after the upgrade?

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Upgrading ASA 5505

Hi,

From 8.3 on memory requirements changes (512MB) for ASA5505. Also, there are NAT changes. Check the below link to get some idea. Search in the forum , you will lot of postings with ref to similar upgrade. If you have a spare unit, I suggest you test the configuration (new) on that before move to production. 

https://supportforums.cisco.com/docs/DOC-12690

hth

MS

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