The Blazor Puzzle 68 - Get Real Client IP Address in Blazor Server Apps

Описание: 🚀 Blazor Puzzle #68: Solving the Real Client IP Mystery
This week, we tackled an issue from a Blazor developer struggling to retrieve the real client IP address when their Blazor Server app was deployed.

🔍 The Problem:
❌ HttpContext.Connection.RemoteIpAddress returns internal, non-routable IPs when running:

Locally (::1 or 127.0.0.1)
In Docker (172.17.x.x)
On Azure App Service or Container Apps (100.x.x.x) due to proxies & load balancers
✅ The Solution:
To get the actual client’s IP address:
1️⃣ Use the X-Forwarded-For Header 📡

Many cloud providers & proxies add this header to preserve the real IP.
2️⃣ Enable ForwardedHeadersOptions in Program.cs
Configures ASP.NET to use the real IP from X-Forwarded-For.
3️⃣ Ensure WebSockets is Enabled in Azure App Service
Prevents SignalR fallback issues that might hide IP details.
4️⃣ Use AddDataProtection() in Azure
Ensures encryption keys sync across multiple instances.
📌 Watch the full deep dive & see the working fix in action!

📩 Have you faced this issue? Drop your thoughts below!

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