Using Internal LUA to update clients

Hi guys , I am using LUA version 2.3.4 in my envoirement for verification before migrating it to production envoirement. Here is exactly what is happening. I have set LUA correctly it downloaded definations . I have two SEPMs I configured them to download defs directly from the internal LUA which they did succuesfully. 

However when I configured my clients to get defs directly from the internal LUA instead of SEPM for some reasons clients are not able to download them from LUA directly connectivity is there between machines and from the SEP endpoints I can telent to LUA  on port 7070.

What could be the reasons for this ? Screenshot is attached