Apple
Airport Extreme Error -6753
by dervish on Nov.07, 2011, under Apple, Wireless
Issue:
When connecting to a new (or newly reset) AirPort Extreme/Time Capsule, the AirPort Utility fails to connect and returns Error -6753.
Solution:
Enable IPV6 on the client machine you are trying to manage the AirPort Extreme from. If you have disabled IPV6 on the client machine, you will not be able to perform the initial configuration of the AirPort Extreme/Time Capsule.