Authenticator issue?

#1 - March 21, 2012, 2:19 a.m.
Blizzard Post
Not sure if this has been reported for patch 15, but i noted this last night when I logged on. When prompted by the log in for my authenticator code I put the current code in. I began to play but within five minutes the server kicked me off. So I took a few to do some web surfing, came back thirty minutes later, signed in my password but the system automatically logged me in without an authenticator code, and I played til I logged out. is this a glitch or something new? Today i logged in and it requested my authenticator code. So not sure if this is a server issue or something else. Thought I should report it.
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Quality Assurance
#2 - March 21, 2012, 2:28 a.m.
Blizzard Post
Battle.net will detect your IP address if you use an authenticator. If you log in from the same IP address consistently, it will not prompt you for an authenticator code. However, if you switch computers or log in from another IP, it will ask for your code.

This functionality is also in WoW and SC2.