Unable to access to internal server web from outside through DNAT firewall rule

Question

Hello Please be informed that i have an ERP which is accessible locally "LAN" but when i tried to access from outside im not able to, however i set up a DNAT rule please find below the screenshot it is in french language 
 i set up port forwarder on the router

Please can you assist me to solv this issue , iperfomed test with telnet ip affected to port WAN & numer of port opened

LuCar Toni · Answer

Your Policy Check will not work that way because you try from the same IP as you try to access. 
 Try as a source IP in the Policy Check 1.2.3.4 to check, if the internet has access. If still no FW rule is matching, your firewall rule is not right. But try in the policy check: tcp://YOURWANIP:8244 instead. I am not sure, if you do https:// here, if it does not try 443 instead.

Casual_User · Answer

Good day Rachid, 
 I suggest, if you are still having difficulty, to use the NAT Server Access Assistant found here: Rules and policies > NAT rules > Add NAT rule > Server access assistant (DNAT) 
 I just tried this for an internal server. It asks a couple of questions then automatically creates the DNAT & Reflexive rules along with the required firewall rule. This only took a minute or two to get working for my particular server.

Erick Jan · Answer

Hi Rachid, 
 Thank you for reaching out to Sophos Community. 
 Any logs from the Log viewer? 
 Kindly do a GUI Packet Capture to further analyze the traffic, also, you can try to use the DNAT Sophos Assistant.

Unable to access to internal server web from outside through DNAT firewall rule

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