Landoria ModSentry

ModSentry verifies that the mods installed on each client match the mods expected by the server. This lets every player use the same mods and play under the same conditions.

Features

• Uses the server's BepInEx/config/ModSentry_Required folder to define the mods and library DLLs required on every client.
• Uses the server's BepInEx/config/ModSentry_Optional folder to define mods and library DLLs that are allowed but not required on clients.
• Rejects client mods and library DLLs that are listed in neither folder.
• Keeps server-only mods in the server's BepInEx/plugins folder; they do not need to be listed in ModSentry_Required or ModSentry_Optional.
• Requires every file approved by the server to have the expected version and SHA-256 hash.
• Automatically rejects the player when a difference is detected and shows an error identifying any extra, missing, or outdated mod.
• Supports an optional guest lobby for clients without ModSentry.
• Detects known ValheimTooler, ValheimHack223, and valheim-hax managed assemblies and lets the server kick the reporting client.

Installation

Most of Landoria mods need to be installed also on the dedicated server, we show you in this video how to do it on windows:

Setup a Valheim Modded dedicated server on Windows

Crossplay support	Steam network support
Yes	No

Client required	Dedicated server required	Player-hosted server
Yes	Yes	Not supported

Server configuration

ModSentry does not use command-line switches. Configure its client policy with these folders on the server:

Folder	Purpose
BepInEx/config/ModSentry_Required	Contains every mod and library DLL required on clients. Include Landoria.ModSentry.dll here.
BepInEx/config/ModSentry_Optional	Contains mods and library DLLs that clients may use but do not need.

Copy the approved client DLLs into the appropriate folder. ModSentry compares their plugin identifier, version, and SHA-256 hash with each connecting client. Any client DLL listed in neither folder is rejected.

Server-only mods stay in BepInEx/plugins and are not copied into either policy folder.

Known managed cheat detection is disabled by default. Enable it on the dedicated server with:

--modsentry-known-cheat-protection true

The server asks verified ModSentry clients to activate the inspection for that connection. Use false or omit the switch to keep it disabled.

To accept players who do not have ModSentry, see the guest lobby integration guide.

Contact

Report bugs through GitHub Issues. For questions and feedback, use GitHub Discussions.

All Landoria mods are used on the Landoria Valheim public servers.