@firefly996 

Looks like the OpenVPN client can't connect to the OpenVPN server at all.

Do you get a response if you do a "ping somedns.tplinkdns.com"?

Have you rebooted your Archer C6 after setting up the OpenVPN? (I know this shouldn't be necessary, but just in case ...)

Try if disabling and then re-enabling the OpenVPN server on the C6 makes any difference.

@woozle Yes I do get a ping on somedns.tplinkdns.com. I have rebooted the router and enabled/disabled the vpn server multiple times. I have also tried from android as well.

Do I need to open port 1194 somewhere, it seems like the server is not accepting the connection at all.

@firefly996 

Routers for home use are designed to open the required ports by themselves if you enable certain services that need ports to be open in the firewall.

Have you verified that the IP address that is shown in your router's GUI for "Internet" is indeed a public one? It is, if it doesn't fall within any of the following IP address ranges:

10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
100.64.0.0 - 100.127.255.255

For further troubleshooting, could you try out if a PPTP VPN connection to your Archer A6 would work?

@woozle I can see the below details on my status page in router configuration.

Internet

Ip address - 172.19.x.x

Subnet Mask - 255.255.255.255

Default gateway - 103.226.x.x

Preferred dns - 175.100.x.x

Secondary dns - 8.8.8.8

Connection Type - PPPoE

Lan

Ip Address - 192.168.0.1

Subnet Mask - 255.255.255.0

This mean that my ISP uses CGNAT. How do I proceed ?

@firefly996 

Really the only thing you can do in this case is to contact your ISP and ask if they have the ability to assign a public IPv4 address to your broadband connection.

Some ISPs will do it upon a user's request (either at no extra cost or by charging an additional fee), but there are also ISP's that don't provide public IPv4 addresses to individual customers at all.

It could also happen that the customer service representative who you get contacted with doesn't even know what a public or a private IP address is. (I've been there before myself)

In any case, normally you are never the only customer who faces this issue. So if you open Google and search for "[My ISP's Name] get public ip address" (or howsoever it is written in your local language) there is always a good chance to find posts of other users about the issue and if you are lucky even the solution.

@woozle I guess that clarifies my problem, now I talk to my ISP and seek appropriate solution. Thank you for you help.