I have cisco firewall 800 series from two week send and recieve email stop  I make nat from 78.93.244.61 to internal local network 192.168.1.4 i take this router from isp awal net and he provide us with real ip 78.93.244.61 but when access to interne...

Hi I have mail server his ip is 192.168.1.4 internally my network and public ip is 78.93.244.61  when i test internet access to mail server it give test internet connection failed i call my isp i told them test internet connection failed please open ...