Azure VPN Gateway
An Azure service that enables the connection of on-premises networks to Azure through site-to-site virtual private networks.
1,744 questions
Azure VPN P2S Intermittent connectivity issue
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Aman Sahota
0
Reputation points
When we set up the P2S VPN, we had an issue with connectivity to the Virtual Network Gateway. In our content filtering program (Barracuda), we whitelisted azuregateway-[GUID].vpn.azure.com which seemed to work initially, but we still have issues with some devices disconnecting after some time or not able to connect altogether. Is there an exhaustive list of domains that may need to be whitelisted? Not just the VPN gateway for OpenVPN protocol but any kind of metadata or other information gathered at any other domain by the VPN client?
Azure VPN Gateway
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Ravi Kanth Koppala 3,391 Reputation points Microsoft Employee Moderator2023-12-19T01:16:37.18+00:00 @Aman Sahota
Based on the Troubleshooting steps provided in the Microsoft documentation, there is no exhaustive list of domains that need to be whitelisted for P2S VPN connectivity. However, it is recommended to check the Barracuda content filtering program logs to see if any domains are being blocked that may be related to the P2S VPN connectivity issue. Additionally, it is recommended to check if the on-premises VPN device has Perfect Forward Secrecy enabled, as this feature can cause disconnection problems. If it is enabled, disabling the feature and updating the VPN gateway IPsec policy may resolve the issue.
References:
- Troubleshooting: Azure Site-to-Site VPN disconnects intermittently
- About VPN devices and IPsec/IKE parameters for Site-to-Site VPN Gateway connections
- Troubleshooting: An Azure site-to-site VPN connection can't connect and stops working
AI Note: This solution is generated using the Microsoft Q&A AI Assist tool.
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ChaitanyaNaykodi-MSFT 27,386 Reputation points Microsoft Employee Moderator2024-01-03T02:53:38.7366667+00:00 Just following up here to see if you were able take a look at the comment above. Thank you!
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