diff --git a/ratis-grpc/src/main/java/org/apache/ratis/grpc/client/GrpcClientProtocolClient.java b/ratis-grpc/src/main/java/org/apache/ratis/grpc/client/GrpcClientProtocolClient.java
index 08bacdb73b..a1f01a5129 100644
--- a/ratis-grpc/src/main/java/org/apache/ratis/grpc/client/GrpcClientProtocolClient.java
+++ b/ratis-grpc/src/main/java/org/apache/ratis/grpc/client/GrpcClientProtocolClient.java
@@ -128,6 +128,8 @@ private ManagedChannel buildChannel(String address, GrpcTlsConfig tlsConf,
       SizeInBytes flowControlWindow, SizeInBytes maxMessageSize) {
     NettyChannelBuilder channelBuilder =
         NettyChannelBuilder.forTarget(address);
+    // ignore any http proxy for grpc
+    channelBuilder.proxyDetector(uri -> null);
 
     if (tlsConf != null) {
       SslContextBuilder sslContextBuilder = GrpcSslContexts.forClient();
diff --git a/ratis-grpc/src/main/java/org/apache/ratis/grpc/server/GrpcServerProtocolClient.java b/ratis-grpc/src/main/java/org/apache/ratis/grpc/server/GrpcServerProtocolClient.java
index 970134d02a..4a280ab335 100644
--- a/ratis-grpc/src/main/java/org/apache/ratis/grpc/server/GrpcServerProtocolClient.java
+++ b/ratis-grpc/src/main/java/org/apache/ratis/grpc/server/GrpcServerProtocolClient.java
@@ -78,6 +78,8 @@ private ManagedChannel buildChannel(RaftPeer target, int flowControlWindow,
       GrpcTlsConfig tlsConfig) {
     NettyChannelBuilder channelBuilder =
         NettyChannelBuilder.forTarget(target.getAddress());
+    // ignore any http proxy for grpc
+    channelBuilder.proxyDetector(uri -> null);
 
     if (tlsConfig!= null) {
       SslContextBuilder sslContextBuilder = GrpcSslContexts.forClient();