DFIntConnectionMTUSize

People paste "DFIntConnectionMTUSize" when looking up Bloxstrap FastFlags. Roblox now allowlists flags; most custom values are ignored.

How-to • Updated 17 October 2026 • 1 min read

Bloxstrap requires the Microsoft .NET 6 Desktop Runtime to be installed

Game history lets you rejoin servers from your current session.

DFIntConnectionMTUSize used to be set through Bloxstrap's FastFlag editor. Bloxstrap 2.10 removed that editor after Roblox's allowlist.

If a pasted JSON does nothing, the flag is not on the allowlist — not a Bloxstrap bug.

Installer: /download.

Frequently asked questions

Is DFIntConnectionMTUSize a cheat?

It is a client setting name. Roblox now ignores most local overrides.

Bloxstrap is an alternative launcher for Roblox with extra features and mods.