Azure VPN Gateway
An Azure service that enables the connection of on-premises networks to Azure through site-to-site virtual private networks.
VPN Client downloaded from Azure portal won't connect to Azure VPN Gateway - Timeout
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Carl Sanders
0
Reputation points
We have been using an Azure VPN Gateway without issue. Today we're getting an error when trying to connect:
A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. (Error 0x8007274c).
We are using the VPN downloaded from the gateway, the certificate was refreshed a couple of months ago and we've had no issues with it up to today.
We have this message under resource health:
Unavailable (Unplanned) : (Unplanned)
At Friday, October 24, 2025 at 2:44:56 AM GMT+1, the Azure monitoring system received the following information regarding your Virtual Network Gateway:
We are sorry, your gateway is in standby mode. During this time the gateway will not initiate or accept connections with on premises devices or other Azure gateways.
Recommended Steps
- Reset your Azure gateway
- Verify if there is a network security group (NSG) applied to the GatewaySubnet
- To get help recovering your gateway, contact support
I followed the instructions in the help section and tried resetting the gateway. That was reported as succeeding. We still couldn't connect.
Connections have been attempted from PCs at different locations so the issue is not local to the VPN clients.
Any help would be very much appreciated as we cannot perform daily BAU tasks whilst this is down.
Azure VPN Gateway
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Priya ranjan Jena 1,510 Reputation points Microsoft External Staff Moderator2025-10-24T12:40:07.3733333+00:00 Hi Carl Sanders,
Welcome to Microsoft Q&A forum.
We are currently assessing your issue , we will update you soon to help you resolve the same.
Thanks
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Priya ranjan Jena 1,510 Reputation points Microsoft External Staff Moderator
2025-10-24T16:47:20.62+00:00 Hi Carl Sanders,
Welcome to Microsoft Q&A forum.
The error and the resource health message indicate that your Azure VPN Gateway is currently in standby mode, which means it cannot accept or initiate connections. This typically happens during failover or when the gateway instance is unhealthy.
You can follow some of the below steps :
Confirm Gateway Status
- Go to Azure Portal - Virtual Network Gateway - Resource Health.
- If it still shows Unavailable (Unplanned), the gateway is not operational. This is usually a platform-level issue.
Check Gateway SKU and Redundancy
- If you are using Basic SKU, note that it does not support active-active or zone redundancy, failover events can cause downtime.
- For production workloads, consider VpnGw1 or higher with active-active configuration
Reference link:
https://free.blessedness.top/en-us/azure/vpn-gateway/about-active-active-gateways
Verify GatewaySubnet NSG
- Ensure there are no NSG rules blocking inbound/outbound traffic on the
GatewaySubnet. - Required ports:
- IKEv2/IPsec: UDP 500, UDP 4500
- ESP: Protocol 50
- If NSG exists, temporarily remove or allow these ports.
Check for Platform Outage
- Navigate to Azure Service Health Issues and check for incidents in your region.
- If there is an ongoing outage, you’ll need to wait for Microsoft to restore service.
Hope you find this comment helpful ,if yes, please “up-vote” for the information provided , this can be beneficial to community members.
Kindly let us know if you have any additional questions.
Thanks
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