SuiteCRM Restrictions

Hello; After a security audit, I need to add some security settings to our Suite CRM Version 7.11.15.
Can I ask the best way to complete the following tasks:
Disable external access to phpMyAdmin
disable support for TLS 1.0 and 1.1
avoid use of all 64-bit block ciphers on
disable access to Composer composer.lock / composer.json