How to block access to secondary Firewall

I have two firewalls in a pair : a Master & a secondary.

How do I block access to the secondary? I mean I want to make changes only to primary & for security reasons access to secondary should be blocked. How do I do that?

I am using a pair of ASA 5510 Firewalls!

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Ernie BeekExpertCommented:
Afaik you can't due to the nature of the failover (assuming you have a failover bundle). The secondary needs to be reachable to keep in synch. And I assume you are one of a few people that can access it? So that wouldn't be too big a problem, would it?
And even if you make changes to the secondary by accident, it should prompt you about that.

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CCIE_UniverseAuthor Commented:
Hi Ernie,

Thanks for your comments............ I had a call with Cisco TAC & they said that it was normal.
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