I am trying to configure this Yamaha router in our lab to open ports to access GMAIL (smtp/imap).I understood that I have to open ports 995 and 465 for this.
Should I do this in "Packet Filtering" or in "NAT" ?
The following images show my current Packet Filtering settings for WAN. (Note that this router's interface is in Japanese and I have shown Google Translated pages)
"Packet Filtering" settings for IN-bound connections to WAN.
"Packet Filtering" settings for OUT-bound connections to WAN.