Hi Milton,
I hope you are doing great! Yes, this is a new bug and has been affected all customers that uses unsupported browsers when managing the ACS 5.x GUI.
Please refer to the following link to have more details about this bug:
ACS: Editing Service Selection Rules in Firefox 46 erases all rules
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz48986/?reffering_site=dumpcr
Also, please read carefully the following Release Note and start using immediately supported browsers for ACS 5.3 versions:
Release Notes for Cisco Secure Access Control System 5.3
http://www.cisco.com/c/en/us/td/docs/net_mgmt/cisco_secure_access_control_system/5-3/release/notes/acs_53_rn.html
Supported Web Client/Browsers
You can access ACS 5.3 administrative user interface using the following Web Client/Browsers:
- Windows 7 32 bit
- Windows XP Professional (Service Pack 2 and 3)
- Windows Vista
- Internet Explorer version 7.x
- Internet Explorer version 8.x
- Internet Explorer version 9.x
- Mozilla Firefox version 3.x
- Mozilla Firefox version 4.x
The above mentioned browsers are supported only with one of the following cipher suits:
- TLS_RSA_WITH_AES_256_CBC_SHA
- TLS_RSA_WITH_AES_128_CBC_SHA
- RSA_WITH_3DES_EDE_CBC_SHA
You should install Windows XP SP3 to use SHA2 256-bit certificates as management certificates.
Right now, this bug is pretty new and although the version 5.3 is not listed under affected versions, it also might be.
Unfortunately, the only solution that exists right now is to use one of the browsers listed above.
I hope this information helps you,
Best regards,
Osvaldo G.
