diff --git a/platform/src/proxy.cpp b/platform/src/proxy.cpp
index 832b01b..82dcd33 100644
--- a/platform/src/proxy.cpp
+++ b/platform/src/proxy.cpp
@@ -159,7 +159,7 @@ int tfe_proxy_fds_accept(struct tfe_proxy * ctx, int fd_downstream, int fd_upstr
 
     enum tfe_stream_proto stream_protocol;
     uint8_t stream_protocol_in_char = 0;
-	int tcp_passthrough = 0;
+	int tcp_passthrough = -1;
 	uint16_t size = 0;
 
 	int result = tfe_cmsg_get_value(cmsg, TFE_CMSG_TCP_RESTORE_PROTOCOL, (unsigned char *)&stream_protocol_in_char,
@@ -183,14 +183,10 @@ int tfe_proxy_fds_accept(struct tfe_proxy * ctx, int fd_downstream, int fd_upstr
 			TFE_LOG_ERROR(ctx->logger, "failed at fetch connection's tcp_passthrough from cmsg: %s", strerror(-result));
 	    	// goto __errout;
 		}
-		else
-		{	
-			TFE_LOG_DEBUG(ctx->logger, "%p: fetch tcp options, passthrough: %d", stream, tcp_passthrough);
-		}
 	}
 
 	/* FOR DEBUG */
-	if (unlikely(ctx->tcp_all_passthrough) || tcp_passthrough)
+	if (unlikely(ctx->tcp_all_passthrough) || tcp_passthrough > 0)
 	{
 		bool __true = true;
 		enum tfe_stream_proto __session_type = STREAM_PROTO_PLAIN;
@@ -198,8 +194,10 @@ int tfe_proxy_fds_accept(struct tfe_proxy * ctx, int fd_downstream, int fd_upstr
 		tfe_stream_option_set(stream, TFE_STREAM_OPT_PASSTHROUGH, &__true, sizeof(__true));
 		tfe_stream_option_set(stream, TFE_STREAM_OPT_SESSION_TYPE, &__session_type, sizeof(__session_type));
 	}
+    TFE_LOG_DEBUG(ctx->logger, "%p: fetch tcp options: cmsg's tcp_passthrough: %d, conf's tcp_passthrough: %d, enalbe passthrough: %d",
+                  stream, tcp_passthrough, ctx->tcp_all_passthrough, (ctx->tcp_all_passthrough > 0 || tcp_passthrough > 0) ? 1 : 0);
 
-	result = tfe_stream_init_by_fds(stream, fd_downstream, fd_upstream);
+    result = tfe_stream_init_by_fds(stream, fd_downstream, fd_upstream);
 	if (result < 0)
 	{
 		TFE_LOG_ERROR(ctx->logger, "%p, Fds(downstream = %d, upstream = %d, type = %d) accept failed.",