提示是这个，有没有大佬知道，服务端有的MOD客户端都有[17:39:32 ERROR]: Channels [bdlib:multiblock,createaddition:main,atlaslib:main,mekanismgenerators:mekanismgenerators,ad_astra:main,create_confectionery:create_confectionery,advgenerators:generators,drinkbeer:main,forge:tier_sorting,bdlib:misc,immersiveengineering:main,ic2:networking,create_central_kitchen:farmersdelight,bfr:bfr,mekanism:mekanism,patchouli:main,create_enchantment_industry:main,hordes:infection,createarmory:createarmory,geckolib3:main,sereneseasons:main_channel,hordes:hordeevent,blueprint:net,create:main] rejected vanilla connections[17:39:32 INFO]: Disconnecting VANILLA connection attempt: This server has mods that require Forge to be installed on the client. Contact your server admin for more details.

waterfall的forge_support开了吗
检查config.yml中forge_support是否为true

开了 用的Arclight服务端和waterfall

虽然但是
你的服务端日志说明服务端认为你的客户端是原版客户端
建议再检查一下有没有忽略了的地方

仔细检查，断开信息明确指出缺少mod

查看ip_forward(忘记是不是这个名字)是否为true

Arclight服务端需要用Lightfall才能正常进  waterfall不行