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ACS Version : 5.3.0.40.5Cisco MDS with system version 4.1(3a)Some accounts have a dedicated policy which allows access only from a specific IP address (by using the End Station Filter on the ACS). But with Cisco MDS boxes, which have "ip domain-looku...
As you said, removing PTR record from our DNS servers is not possible. Moreover, deactivating the "ip domain-lookup" isn't possible too (option needed for some other usage), so I'll see with Cisco.Thanks for your time,