---
title: Azure VPN Connection Dropped Packets | Blue Matador - Troubleshooting
description: How to troubleshoot Azure VPN Connection dropped packets
image: https://www.bluematador.com/hubfs/logo-1.png
---

 Docs

# Azure VPN Connection Dropped Packets

Blue Matador automatically monitors the **TunnelEgressPacketDropTSMismatch** and **TunnelIngressPacketDropTSMismatch** metrics to detect when packets on your Azure VPN connections are dropped due to traffic selector mismatch. Traffic selector mismatch occurs when the local and remote addresses for traffic in the VPN tunnel does not match the traffic selectors configured on either end of the VPN.

Traffic selector mismatch is caused by configuration on either end of the VPN tunnel. Azure VPN Gateways support specific IPsec and IKE configurations that must match with the device on the other end of the tunnel. Consult the following guides to troubleshoot depending on your specific setup:

- [Configure IPsec/IKE policy for S2S VPN or VNet-to-VNet connections](https://docs.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-ipsecikepolicy-rm-powershell)
- [Connect Azure VPN gateways to multiple on-premises policy-based VPN devices using PowerShell](https://docs.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-connect-multiple-policybased-rm-ps#configurepolicybased)
- [Configure a VNet-to-VNet VPN gateway connection by using the Azure portal](https://docs.microsoft.com/en-us/azure/vpn-gateway/vpn-gateway-howto-vnet-vnet-resource-manager-portal)
- [Diagnose on-premises connectivity via VPN gateways](https://docs.microsoft.com/en-us/azure/network-watcher/network-watcher-diagnose-on-premises-connectivity)