diff --git a/src/main/java/com/falsepattern/lib/internal/impl/config/ConfigurationManagerImpl.java b/src/main/java/com/falsepattern/lib/internal/impl/config/ConfigurationManagerImpl.java
index 83c6b20..eb58ef2 100644
--- a/src/main/java/com/falsepattern/lib/internal/impl/config/ConfigurationManagerImpl.java
+++ b/src/main/java/com/falsepattern/lib/internal/impl/config/ConfigurationManagerImpl.java
@@ -161,8 +161,9 @@ public final class ConfigurationManagerImpl {
     }
 
     public static void receiveReply(DataInput input) throws IOException {
-        if (!AllConfigSyncEvent.postStart()) {
-            Share.LOG.warn("Config synchronization was cancelled by event.");
+        if (AllConfigSyncEvent.postStart()) {
+            Share.LOG.warn("All config synchronization was cancelled by event.");
+            return;
         }
         int count = input.readInt();
         for (int i = 0; i < count; i++) {
@@ -182,7 +183,7 @@ public final class ConfigurationManagerImpl {
                                + serializedName);
                 continue;
             }
-            if (!ConfigSyncEvent.postStart(clazz)) {
+            if (ConfigSyncEvent.postStart(clazz)) {
                 input.skipBytes(dataSize);
                 Share.LOG.warn("Config synchronization was cancelled by event for: " + serializedName);
                 continue;
diff --git a/src/main/java/com/falsepattern/lib/internal/impl/config/net/SyncRequestHandler.java b/src/main/java/com/falsepattern/lib/internal/impl/config/net/SyncRequestHandler.java
index 2f5ff80..657e37e 100644
--- a/src/main/java/com/falsepattern/lib/internal/impl/config/net/SyncRequestHandler.java
+++ b/src/main/java/com/falsepattern/lib/internal/impl/config/net/SyncRequestHandler.java
@@ -24,12 +24,16 @@ import com.falsepattern.lib.internal.FalsePatternLib;
 import com.falsepattern.lib.internal.Share;
 import lombok.val;
 
+import net.minecraft.client.Minecraft;
+import net.minecraft.entity.player.EntityPlayerMP;
+import cpw.mods.fml.common.FMLCommonHandler;
 import cpw.mods.fml.common.network.simpleimpl.IMessage;
 import cpw.mods.fml.common.network.simpleimpl.IMessageHandler;
 import cpw.mods.fml.common.network.simpleimpl.MessageContext;
 import cpw.mods.fml.relauncher.Side;
 
 import java.io.IOException;
+import java.util.Objects;
 
 public class SyncRequestHandler implements IMessageHandler<SyncRequest, IMessage> {
     @Override
@@ -38,6 +42,12 @@ public class SyncRequestHandler implements IMessageHandler<SyncRequest, IMessage
             //Do not sync client to server
             return null;
         }
+        if (Objects.requireNonNull(FMLCommonHandler.instance().getSide()) == Side.CLIENT) {
+            //Integrated server only syncs to open-to-lan joiners
+            if (isLocalPlayer(ctx.getServerHandler().playerEntity)) {
+                return null;
+            }
+        }
         try {
             message.receive();
             val reply = new SyncReply();
@@ -50,4 +60,13 @@ public class SyncRequestHandler implements IMessageHandler<SyncRequest, IMessage
             return null;
         }
     }
+
+    private static boolean isLocalPlayer(EntityPlayerMP playerMP) {
+        val localPlayer = Minecraft.getMinecraft().thePlayer;
+        if (localPlayer == null)
+            return false;
+        val remoteUUID = playerMP.getUniqueID();
+        val localUUID = localPlayer.getUniqueID();
+        return Objects.equals(remoteUUID, localUUID);
+    }
 }