Serversync Version: Irrelevant

Minecraft Version: also Irrelevant

Issue: Certain mods create data in the mods folder that does not need to be copied to clients. Copying it makes syncs take up to 40 minutes. I tried using wildcard to exclude a directory in the mods folder and it did not work so I don't think it is currently possible.

Looks like this works with glob patterns:

serversync-server.cfg

S:FILE_IGNORE_LIST <
    mods/nastyfolder/**
>

Live Example

Tested this with SS 2.6.19, does indeed ignore everything in 'nastyfolder'.