An Azure service that is used to provision Windows and Linux virtual machines.
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@Farber Frederick, FG-AM-5 I hope you are doing well,
Since the routing path exists, check these areas to isolate why the HTTPS connection is timing out:
Test TCP Port 443 Directly: Run this in PowerShell to see if the TCP handshake completes:
PowerShell
Test-NetConnection
If TcpTestSucceeded is False, the port is blocked.
- Check Outbound NSG & Firewall Rules: Verify your subnet/NIC NSG allows outbound traffic on TCP 443, and check if an Azure Firewall or NVA proxy is blocking or inspecting traffic to that domain.
Check MTU Packet Black-Holing: ICMP packets often pass while larger TLS handshake packets get dropped due to MTU size limits. Test with:
DOS
ping
Enterprise IP Whitelisting / Corporate VPN: Enterprise login portals often silently drop traffic from unauthorized Azure Public IP addresses. Ensure your VM's egress traffic routes through the corporate network/ExpressRoute if required.
References:
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