How to set up this service on ECS servers and cloud servers? I want to detect the current NAT type on the client side The server only has one public IP and one internal IP

[apsara2825]

[jselbie]

Groan... I used to know how to do this quite well. But now it appears that Amazon has changed how to setup multi-network instances.

Ok, I see how to do this now. It's not obvious.

In the "Network Settings" panel for the instance configuration before you launch it... click "Edit"

Change the subnet option from "No preference" to an explicit selection.

• Choose an option that is not "No preference"

That should activate the visibility of the "Advanced network configuration" drop down:

At the bottom of that expansion, there's a button for "Add network interface"

I forgot how I did this last year. But it appears that I use one elastic IP address and assigned that to the secondary adapter.

As for the Stunserver code itself. Explicitly use the --primaryadvertised and --altadvertised command line parameter and specify the public ip addresses as each.

Then use the --primaryinterface and --altinterface command line parameters to specify which local (private) ip address the code should listen for.

Example:

./stunserver --ddp --mode full --family 4 --protocol udp --primaryinterface 172.31.10.101 --altinterface 172.31.10.102 --primaryadvertised 3.135.212.85 --altadvertised 3.132.228.249

[jselbie]

Does this help?

[apsara2825]

这有帮助吗？

Thank you very much for your reply. I have followed your method carefully, but my ECS server can only be assigned one public IPV4, but there can be multiple private 192.168.0.0/16 addresses. Do you need two public addresses to achieve NAT type detection

[apsara2825]

Does this help?
My server is not an elastic ECS. I tried to purchase an elastic public network, but it prompted me that I cannot bind to my ECS instance. This is too regrettable

[weili0677]

这有帮助吗？

Thank you very much for your reply. I have followed your method carefully, but my ECS server can only be assigned one public IPV4, but there can be multiple private 192.168.0.0/16 addresses. Do you need two public addresses to achieve NAT type detection非常感谢您的回复。我仔细按照您的方法操作，但我的 ECS 服务器只能分配一个公网 IPV4，但可以有多个私有 192.168.0.0/16 地址。是否需要两个公有地址来实现 NAT 类型检测
primaryinterface and altinterface can use 127.0.0.1 and private ip(such as 192.168.0.11)
primaryadvertised and altadvertised can use one public ip(such as 123.12.65.12)
I test it success with myself.good luck.

[weili0677]

这有帮助吗？

Thank you very much for your reply. I have followed your method carefully, but my ECS server can only be assigned one public IPV4, but there can be multiple private 192.168.0.0/16 addresses. Do you need two public addresses to achieve NAT type detection

如果你是中国人的话，就是：primaryinterface 和 altinterface可以分别填127.0.0.1和你的内网ip。primaryadvertised和altadvertised可以填相同的1个外网IP。我测试过了，没问题。