Friday, July 23, 2021

FMC removes configuration on deploy to FTD

Anyone hitting this issue right now? We did an upgrade to 6.6 a few weeks back and it was fine until recently. Now we're hitting a behavior where FMC is removing configuration on the managed FTD, even though the relevant policy / object / config still exists.

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For example, if you have an access control policy referencing some object named "Mail-Server-10.135.200.100", FMC may randomly decide that the rule and object no longer exists, and send commands to remove the rule entry and object.

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The workaround? You change the thing referencing the object or rule and change it back, then re-deploy and cross your fingers hoping it doesn't remove something else.

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We're hitting this on 6.6.1 and 7.0.0. We were specifically instructed by TAC to upgrade to 7.0.0 to fix this bug.

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Jokes on us because we're still hitting it. We literally cannot make changes because it might remove something.



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