tested multiple IPV6 MTU (1300,1442,1472..) on the windows 10  : no success

Any possibility to monitor or some stat on the traffic from HE point a view ?

What do you mean exactly, you can ping the server IPv6 address? Which IPv6 are you trying to ping exactly?

And no, of course you cannot ping your private IPv4 from subnetonline.com. You need to check if you can ping your public IPv4 (180.246.218.244 in your sketch). I can ping it from here, but I don't know if that is your current public IPv4 address. Check your current public IPv4 by visiting http://ip4.me/.

Edit: maybe you can configure your HG8245H to act as bridge in WAN configuration?

Edit2: Can't you configure IPv6 directly from the HG8245H? Maybe it needs a firmware update, but it should have this option available. Don't know if this supports 6in4 though.

You can try DMZ mode. Port forwarding will not work. 6in4 is protocol 41, nothing to do with TCP/UDP and doesn't use ports. Ports are only used by TCP/UDP.

Btw: did you try already if you can ping your public IP address? E.g. use https://www.subnetonline.com/pages/network-tools/online-ping-ipv4.php

Already try DMZ mode and change the configuration since I wrongly put my public IP address instead my mikrotik Private address in 6to4 configuration
in my mikrotik terminal I already can ping the Server IPv6 Address, but using the subnetonline I cannot ping my private IP, is it ok?

thank you for the reply

You can try DMZ mode. Port forwarding will not work. 6in4 is protocol 41, nothing to do with TCP/UDP and doesn't use ports. Ports are only used by TCP/UDP.

Btw: did you try already if you can ping your public IP address? E.g. use https://www.subnetonline.com/pages/network-tools/online-ping-ipv4.php

Setting up the tunnel shouldn't work at all in 1803?! Or did they fix it in 1803 after all? Which build did you use in 1803?

Unlike Huawei this is proven (through the Snowden documents) to be spy hardware. Mikrotik os OK so far.

Didn't know about this, but my ISP only lending this router when we use their service and only this device that can connect to their network

You should try a different router.  Chinese spy hardware is not my first choice.  You should research whether it’s DMZ function passes everything or just unknown TCP/UDP ports.

Lastly, for a tunnel here, you need “6in4”, not 6to4.

Sadly i can't change the Huawei router that since it's only router that my ISP giving to us for my house. probably gonna try the DMZ configuration hope it's gonna work

Sorry i didn't know which one is the correct one since the example configuration given from the tunnel is only 6to4
here the configuration
https://imgur.com/YSBDdbm

I am not familiar with that router, so I can't help with specifics.

Is there an HE script that you can apply? They have some for popular routers/OSes

Post the config you have.

I think i just following the config on Example Configurations tabs on the Tunnel Details

https://imgur.com/YSBDdbm

Sounds like an MTU mismatch

Hi,

I'm using a draytek 2925.

The he tunnel ipv6 seems ok : ping both ways are working.

But web TCP sessions fails.

Any help for fix or troubleshooting  is welcome.