Removed all ports from Port forwarding and set them up in Range port forwarding, didn't work. Tried disabling Port forwarding and just enabling Upnp, didn't work. As a last option I tried DMZ too, but it's still showing strict NAT. Using a TP-Link WR841N V11 with dd-wrt (Firmware: DD-WRT …
For Port Forwarding Troubshooting, see Port Forwarding Troubleshooting The internet works using two main address units: the IP Address and the port. When your computer makes a call on the internet--trying to load www.dd-wrt.com for example--it starts by asking the IP address of www.dd-wrt… Tutorial on Port Forwarding With a DD-WRT Router Sep 14, 2012 Port Forwarding Troubleshooting - DD-WRT Wiki
24 Best DD-WRT Screenshot Collection images | Router
DD-WRT port forwarding - YouTube
24 Best DD-WRT Screenshot Collection images | Router
TP-Link Router Port Forwarding | Support | No-IP Knowledge