Sorry about that I tried to look for the entire config again...what is weird I did a grep for authentication but didn't get the match to the statement that is included in the update configuration. I see it now.
Can you post the entire config again so i can take a look one more time.
Based on the ACL that you are using everything should work fine and it should only trigger authentication for traffic destined to those servers.
Did you try adding a deny ip any any (it should be implicit) at the end of this access-list just to see if that helps?
Thanks,
Tarik Admani
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