@matt87825 \

What is your WAN/Internet IP address?  This can be seen on the Advanced menu in the user UI.

@matt87825 

What to do if the our client website is not working even though the internal is often at full speed.

Give me a reply that will let me know.

Because I have tried from many different ways, but even if the internet runs at some point, our ofiicial website does not load properly. Please tell me the reasons for this.

@sanvidave 

Are you speaking about your company's website?  Matt is not a TP-Link employee so he may not know these answer.  I would need to know more, such as what TP-Link router you have and your service type etc.  

@matt87825 

That was my bad.  I should have been more clear.  I deleted your response as you do not want to share your public IP publically.  I also deleted it before reviewing the message.  I was concerned about protecting your infromation if it was a true public IP.  If the address starts with a 10.x.x.x a 172.16.x.x. or a 192.168.x.x it is a private IP and that may indicate you have the router connnected to a Gateway and may be experiancing a Double NAT issue.  If that is the case you can either remove the gateway and plug this router directly into the modem or if that is not possible put this router in AP mode.  If the address was anything other than the above let me know but don't share it. 

@matt87825 if I was you I'd try control access make sure your address didn't change. If it's a lap top and you went to restaurant coffee shop or friends house etc then your Mac changed try to erase your iD in the router and restart it after reset. This time choose don't clone addresses cause if you've changed modem even your MAC iD is different this happen to me also. Hope this helps you