@GRL no ISP problem. 4 different isps and mainly if I remove er routers and put exactly same wan configuration on another router it starts to work. So it's useless that i do a wireshark capture? I only have to change router? 

  @TheNetAssistanc found also this threat on forum for your reference

https://community.tp-link.com/en/business/forum/topic/657418

  @TheNetAssistanc 

TheNetAssistanc wrote

  @TheNetAssistanc found also this threat on forum for your reference

 

https://community.tp-link.com/en/business/forum/topic/657418

Like I wrote, I asked if you have a public IP on the router. Or you have multiple layers of NAT, which causes the trouble instead of the Omada router. 

I think you can Wireshark after you mirror the WAN and let's see what you can provide about the STUN. 
As before, I am not familiar with any third-party software or apps. I need docs from them or their instructions and what they need to port forward or enable on the router. Then, I might have some ideas about the troubleshooting direction. 

  @TheNetAssistance

 Public ip address on WAN side, so no other nat.

This is the simplest setup i tried:

Internet --> ONT provided from the ISP to convert fiber to ethernet ---> ER router --> Notebook with whatsapp desktop on ER lan side. DOESN'T WORK

if i replace the ER with this

Internet --> ONT provided from the ISP to convert fiber to ethernet ---> Ubiquity router --> Notebook with whatsapp desktop on ubiquity lan side. IT WORKS

or

Internet --> ONT provided from the ISP to convert fiber to ethernet ---> Grandstream GCC router --> Notebook with whatsapp desktop on ubiquity lan side. IT WORKS

@clive_a I can also give you a teamviwer or similar so you can check and test by yourself. I'm able to give you a pc with a test whatsapp on it and full access to the ER router in standalone mode

  @TheNetAssistanc 

TheNetAssistanc wrote

  @TheNetAssistance

 

 Public ip address on WAN side, so no other nat.

 

This is the simplest setup i tried:

 

Internet --> ONT provided from the ISP to convert fiber to ethernet ---> ER router --> Notebook with whatsapp desktop on ER lan side. DOESN'T WORK

 

if i replace the ER with this

 

Internet --> ONT provided from the ISP to convert fiber to ethernet ---> Ubiquity router --> Notebook with whatsapp desktop on ubiquity lan side. IT WORKS

 

or

 

Internet --> ONT provided from the ISP to convert fiber to ethernet ---> Grandstream GCC router --> Notebook with whatsapp desktop on ubiquity lan side. IT WORKS

 

@clive_a I can also give you a teamviwer or similar so you can check and test by yourself. I'm able to give you a pc with a test whatsapp on it and full access to the ER router in standalone mode

Make sure you reply to my message.

I need a diagram of your network with the IP specified for all the devices in this link. 

I need to know if you have a cellphone to call under this network, will it work or not?

I need AnyDesk access. TeamViewer is not convenient.

It seems that you can host an unattended desktop for me. Need it to be 24 hrs up for the remote session as we may access it at any time and in a different time zone. 

For remote information, this will be another reply. I need a diagram and an answer to the question in the next reply. 

  @Clive_A Hi where i can send you all the data for the access? if you don't follow me i cn't write you personal message

  @TheNetAssistanc 

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