Sorry , I can’t answer to that , Fail2ban stopped distributing or supporting 0.8 six years ago. php stopped distributing or supporting 5.6 three years ago I would take both issues up with Sangoma (but they are ham-strung by Zend which they chose to protect their apparently still broken php code (that means that nobody but them can help you here ) but as Zend is no longer a thing then go figure Yossarian . . . 
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