NAT rule for Loopback and VPN connections

Question

v18 newbie here. 
 
 in earlier version 17, there was only the firewall rules for all connection types. 
 In 18, have to create nat rules too. 
 
 There is no usage count on some of my migrated after 2 weeks from upgrade. Lan to lan communication requests via special ports not working. 
 Is there any need of Linked NAT configuration? 
 
 Don't know where the wrong is? 
 May anyone help please. 
 Firewall Rule details

emmosophos · Answer

Hello there, 
 Thank you for contacting the Sophos Community. 
 The Linked NAT Rules, are created automatically, to maintain compatibility, however many of them may be redundant, like in your case, you can confirm by doing a GUI Packet Capture, accessing one of the servers to know which NAT rules are being used, and then you can certainly delete the now unused Linked NAT. 
 Take a look at this link , to understand better how NAT works now in v18. 
 Regards,