This plugin fixes a Velocity proxy issue that can cause clients to disconnect during the Minecraft 1.21+ configuration phase when too many \u201cknown packs\u201d are sent. This often results in errors such as KnownPacksPacket or corrupted frame exceptions, especially in heavily modded environments.<\/p>\n
The issue occurs during the handshake\/configuration phase when modded clients and servers exchange a large number of mod or configuration packs through a Velocity proxy, exceeding practical protocol limits and leading to unstable connections.<\/p>\n
This plugin applies a compatibility workaround to reduce or prevent these disconnects, improving stability when joining modded servers through Velocity.<\/p>\n
Fixes \u201ctoo many known packs\u201d \/ KnownPacksPacket disconnects
\nImproves Velocity proxy compatibility during the configuration phase
\nDesigned for modded Minecraft environments (NeoForge-focused, may work with others)
\nHelps stabilize connections on heavily modded servers<\/p>\n
Why this exists<\/p>\n
This was created while running into the issue personally on a modded 1.21+ setup behind Velocity. There wasn\u2019t a clear or reliable fix available at the time, so this workaround was developed and shared publicly in case others encounter the same problem. If it helps your server, feel free to use it \u2014 you’re welcome. \ud83d\ude00<\/p>\n","protected":false},"excerpt":{"rendered":"
Fixes Velocity \u2018KnownPacksPacket\u2019 config-phase disconnects caused by excessive mod\/config pack entries on NeoForge\/Fabric\/Forge clients.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_minecraft_slug":"knownpacksfix","_minecraft_project_id":"peW3mSAL","_minecraft_author":"koelss","_minecraft_license":"MIT","_minecraft_downloads":10,"_minecraft_follows":2,"_minecraft_client_side":"unsupported","_minecraft_server_side":"required","_minecraft_storage_type":"zip","_minecraft_archive_name":"knownpacksfix.zip","_minecraft_size_bytes":28163,"_minecraft_version_count":3,"_minecraft_updated_at":"2026-05-15T23:06:53.229523Z","_minecraft_date_created":"2026-04-29T23:23:12.007151Z","_minecraft_date_modified":"2026-05-12T05:31:25.602717Z","_minecraft_project_url":"https:\/\/modrinth.com\/mod\/knownpacksfix","_minecraft_icon_attachment_id":0,"_minecraft_imported_at":"2026-06-05T04:26:56+00:00","_minecraft_import_hash":"6d8c61af4e2e60d65dc9eb59e8c97a3b","_minecraft_versions":"","_minecraft_links":"","_minecraft_gallery":"","_minecraft_api_metadata":""},"mod_category":[126,92,985],"mod_loader":[986],"minecraft_version":[62,37,40,41,73,74,38,78,79,80,81,82,83,167,163],"class_list":["post-90844","mod","type-mod","status-publish","hentry","mod_category-management","mod_category-utility","mod_category-velocity","mod_loader-velocity","minecraft_version-1-21","minecraft_version-1-21-1","minecraft_version-1-21-10","minecraft_version-1-21-11","minecraft_version-1-21-2","minecraft_version-1-21-3","minecraft_version-1-21-4","minecraft_version-1-21-5","minecraft_version-1-21-6","minecraft_version-1-21-7","minecraft_version-1-21-8","minecraft_version-1-21-9","minecraft_version-26-1","minecraft_version-26-1-1","minecraft_version-26-1-2"],"yoast_head":"\n