Thks for the reoly,the article did not help,
I use IIS with the websocket installed ( not using NGINX as proxy)
Configure reverse proxy by the following steps
1.Download the URL Rewrite 2.0 x64 module.
2.Download the Application Request Routing 3.0 x64 module.
3.Install the modules (trivial installers with no customizations or options to select).
4.On the Start page, click the Server Manager tile, and then click OK.
5.Expand the Tools menu, and select Information Information Services (IIS) Manager.
6.In the left-hand navigation tree, expand the server node, expand Sites, and select Default Web Site.
7.Double-click the URL Rewrite feature
8.In the actions pane (far-right), select Add Rule(s)…
9.Select Reverse Proxy and press OK.
10.In the Add Reverse Proxy Rules dialog,
11.Enter 10.0.0.2:8065 in the Enter the server name or IP address where HTTP requests will be forwarded field.
12.Ensure the Enable SSL Offloading option is checked.
13.Check Rewrite the domain names of the links in HTTP responses
14.Enter 10.0.0.2:8065 in the From field.
15.Enter mattermost.example.com in the To field.
16.Press OK
the mattermost website work fine , but websocket connection fail (even browser on the server site)
Is there any way to fix that ?