Technical Tip: How to disable TCP window scaling (access to sysctl)
Description
This article describes how to disable TCP window scaling with FortiMail v4.0, v7.x, and v8.x.
FortiMail v3.0 had a CLI command to modify the Linux sysctl variables.
FortiMail v3.0 had a CLI command to modify the Linux sysctl variables.
Scope
FortiMail v4.0, v7.x, v8.x MR3.
Solution
In FortiMail v4.0, v7.x, and v8.x there is no command to modify these variables; however, in some instances, TCP window scaling might have to be disabled.
To disable TCP window scaling, connect to the CLI of the FortiMail and run the following CLI command:
To disable TCP window scaling, connect to the CLI of the FortiMail and run the following CLI command:
config system kernel
edit sys.net.ipv4.tcp_window_scaling
set value 0
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