Unstable Site-to-Site IPSec VPN tunnel (SonicWall Firewall) RRS feed

  • Question

  • Hello, 

    I am currently using my Free Trial Azure account to test deploying VM in the public cloud space. I have successfully created the IPSec VPN Tunnel to our corporate network's SonicWall Firewall (successful ping, dns queries, etc) based on the MS documentation. However, the established tunnel is unstable and I would find frequent packet loss from every few seconds to every couple minutes. Can someone help?


    David Kwang

    Monday, April 1, 2013 4:35 PM


  • Hello,

    Thank you for posting your question here.

    While there can be many reasons for packet loss, the most common reason is an incorrect setting for the MTU or MSS on your device. Please set to 1350.

    Please also know that SonicWall is not on the list of known compatible devices. There may be other reasons why it is unable to establish a reliable connection.



    Wednesday, April 3, 2013 9:21 PM