I just started deploying SA 6500 in cluster mode, I configured the Management interface from the management subnet.
The issue here is that I cannot login via Management interface of 6500 via admin username and password.
The same username is working fine if I am accessing via Internal IP address.
Appreciate your support.
Have you enabled admin login on the management interface at Administrators>Admin Realms>realmname>Authentication Policy> Source IP?
By default, admins are allowed _only_ on the internal port; you have to intentionally enable additional port access.