Because Elastix 2.5.0 uses older libraries (OpenSSL 0.9.8e, PHP 5.1.6), it is vulnerable to modern exploits (Heartbleed, Shellshock, etc.) unless secured.
Pre-configured protection against brute-force attacks. Firewall: IPTables management directly via the GUI. Backup/Restore: Single-click system configuration backups. Elastix 2.5.0 STABLE x86-64