Appliance or vault behind a Sonicwall firewall losing connection to the Management Portal

Written By Tami Sutcliffe (Super Administrator)

Updated at April 11th, 2022


On the appliance/vault - Global Management Portal (GMP) Section Not Saving Settings

Also, GMP Not Updating Backup and Replication Time

Sonicwall devices have a 15 minute TCP session timeout by default.

These can affect long-lived TCP connections such as the connection between the appliances and vaults to the Global Management Portal. 


To increase the TCP timeout setting:

  • Login to your Sonicwall device
  • Go to the top-level menu item Firewall
  • Choose TCP Settings
  • Change the Default TCP Connection Timeout from its default value of 15 minutes to 120 minutes 

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