@Sofortune login to the router gui , go to Network->LAN then click the 'edit' icon for the default LAN Change the IP address to 192.168.1.1 , change the DHCP pool Starting and End addresses to be in...

@acedilloruss sorry, I don't know enough about your setup to help. I was merely pointing out that the r470t ports appear to have a physical limit of 100Mb which will limit your throughput. I sounds...

@acedilloruss I thought the R470T+ only had 10/100 Ethernet ports ? So you're going to be limited to 100Mb * 2

@AdeelKhan TBH I'd missed that you have the ER7206 and not the ER605. However having searched, it would appear that the ER7206 is based around the same Openwrt version and thus the same Linux kernel....

@AdeelKhan Apparently support for base-port based 1:1 port mapping in DNAT with a base port was only added to iptables in 2018...

@ursin According to this recent thread https://community.tp-link.com/en/business/forum/topic/616602 the ER605 Openvpn client does not currently support the AES-256-GCM cipher