I understand that you will be upgrading and migrating to a new ASA device. The easiest way to upgrade the ASA would be to first go to 8.2 code on your 5505. Then upgrade your 5505 to 8.3 code which will upgrade your configuration to 8.3. You can then copy and paste but you will have to also make sure that you adjust the interfaces and other things which are different between 5505 vs. 5510. Also, We only recommend and support going from 8.2 to 8.3 due to the number of massive changes to the configuration. I'll include a netpro doc link which has a lot of good information. Upon loading up of the new 8.3 code, the configuration will be auto migrated. I'll include a migration doc that you will need to read and understand as there are alot of changes to the code.
Its advisable to do this through the cli by following one of the docs available online. Be sure also that your 5510 has the memory upgrade which is required for 8.3.
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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...