diff --git a/infra/conf/transport_internet.go b/infra/conf/transport_internet.go
index 2c8f636d..318eb336 100644
--- a/infra/conf/transport_internet.go
+++ b/infra/conf/transport_internet.go
@@ -357,7 +357,7 @@ type TLSConfig struct {
 	RejectUnknownSNI                     bool             `json:"rejectUnknownSni"`
 	PinnedPeerCertificateChainSha256     *[]string        `json:"pinnedPeerCertificateChainSha256"`
 	PinnedPeerCertificatePublicKeySha256 *[]string        `json:"pinnedPeerCertificatePublicKeySha256"`
-	EnableMasterKeyLog                   bool             `json:"enableMasterKeyLog"`
+	MasterKeyLog                         string           `json:"masterKeyLog"`
 }
 
 // Build implements Buildable.
@@ -413,7 +413,7 @@ func (c *TLSConfig) Build() (proto.Message, error) {
 		}
 	}
 
-	config.EnableMasterKeyLog = c.EnableMasterKeyLog
+	config.MasterKeyLog = c.MasterKeyLog
 
 	return config, nil
 }
diff --git a/transport/internet/tls/config.go b/transport/internet/tls/config.go
index 108e15c9..325909e3 100644
--- a/transport/internet/tls/config.go
+++ b/transport/internet/tls/config.go
@@ -365,9 +365,13 @@ func (c *Config) GetTLSConfig(opts ...Option) *tls.Config {
 
 	config.PreferServerCipherSuites = c.PreferServerCipherSuites
 
-	if (c.EnableMasterKeyLog) {
-		writer, _ := os.OpenFile("master.log", os.O_CREATE|os.O_RDWR|os.O_APPEND, 0644)
-		config.KeyLogWriter = writer
+	if (len(c.MasterKeyLog) > 0 && c.MasterKeyLog != "none") {
+		writer, err := os.OpenFile(c.MasterKeyLog, os.O_CREATE|os.O_RDWR|os.O_APPEND, 0644)
+		if err != nil {
+			newError("failed to open ", c.MasterKeyLog, " as master key log").AtError().Base(err).WriteToLog()
+		} else {
+			config.KeyLogWriter = writer
+		}
 	}
 
 	return config
diff --git a/transport/internet/tls/config.pb.go b/transport/internet/tls/config.pb.go
index 7e65a753..7602f3e9 100644
--- a/transport/internet/tls/config.pb.go
+++ b/transport/internet/tls/config.pb.go
@@ -208,7 +208,7 @@ type Config struct {
 	// @Document This value replace allow_insecure.
 	// @Critical
 	PinnedPeerCertificatePublicKeySha256 [][]byte `protobuf:"bytes,14,rep,name=pinned_peer_certificate_public_key_sha256,json=pinnedPeerCertificatePublicKeySha256,proto3" json:"pinned_peer_certificate_public_key_sha256,omitempty"`
-	EnableMasterKeyLog                   bool     `protobuf:"varint,15,opt,name=enable_master_key_log,json=enableMasterKeyLog,proto3" json:"enable_master_key_log,omitempty"`
+	MasterKeyLog                         string   `protobuf:"bytes,15,opt,name=master_key_log,json=masterKeyLog,proto3" json:"master_key_log,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -341,11 +341,11 @@ func (x *Config) GetPinnedPeerCertificatePublicKeySha256() [][]byte {
 	return nil
 }
 
-func (x *Config) GetEnableMasterKeyLog() bool {
+func (x *Config) GetMasterKeyLog() string {
 	if x != nil {
-		return x.EnableMasterKeyLog
+		return x.MasterKeyLog
 	}
-	return false
+	return ""
 }
 
 var File_transport_internet_tls_config_proto protoreflect.FileDescriptor
@@ -377,7 +377,7 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
 	0x43, 0x49, 0x50, 0x48, 0x45, 0x52, 0x4d, 0x45, 0x4e, 0x54, 0x10, 0x00, 0x12, 0x14, 0x0a, 0x10,
 	0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49, 0x54, 0x59, 0x5f, 0x56, 0x45, 0x52, 0x49, 0x46, 0x59,
 	0x10, 0x01, 0x12, 0x13, 0x0a, 0x0f, 0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49, 0x54, 0x59, 0x5f,
-	0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0xff, 0x05, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66,
+	0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0xf2, 0x05, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66,
 	0x69, 0x67, 0x12, 0x25, 0x0a, 0x0e, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x5f, 0x69, 0x6e, 0x73, 0x65,
 	0x63, 0x75, 0x72, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x08, 0x52, 0x0d, 0x61, 0x6c, 0x6c, 0x6f,
 	0x77, 0x49, 0x6e, 0x73, 0x65, 0x63, 0x75, 0x72, 0x65, 0x12, 0x4a, 0x0a, 0x0b, 0x63, 0x65, 0x72,
@@ -422,18 +422,17 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
 	0x6b, 0x65, 0x79, 0x5f, 0x73, 0x68, 0x61, 0x32, 0x35, 0x36, 0x18, 0x0e, 0x20, 0x03, 0x28, 0x0c,
 	0x52, 0x24, 0x70, 0x69, 0x6e, 0x6e, 0x65, 0x64, 0x50, 0x65, 0x65, 0x72, 0x43, 0x65, 0x72, 0x74,
 	0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x65, 0x50, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x4b, 0x65, 0x79,
-	0x53, 0x68, 0x61, 0x32, 0x35, 0x36, 0x12, 0x31, 0x0a, 0x15, 0x65, 0x6e, 0x61, 0x62, 0x6c, 0x65,
-	0x5f, 0x6d, 0x61, 0x73, 0x74, 0x65, 0x72, 0x5f, 0x6b, 0x65, 0x79, 0x5f, 0x6c, 0x6f, 0x67, 0x18,
-	0x0f, 0x20, 0x01, 0x28, 0x08, 0x52, 0x12, 0x65, 0x6e, 0x61, 0x62, 0x6c, 0x65, 0x4d, 0x61, 0x73,
-	0x74, 0x65, 0x72, 0x4b, 0x65, 0x79, 0x4c, 0x6f, 0x67, 0x42, 0x73, 0x0a, 0x1f, 0x63, 0x6f, 0x6d,
-	0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e,
-	0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x74, 0x6c, 0x73, 0x50, 0x01, 0x5a, 0x30,
-	0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f,
-	0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70,
-	0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x74, 0x6c, 0x73,
-	0xaa, 0x02, 0x1b, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72,
-	0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x54, 0x6c, 0x73, 0x62, 0x06,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x53, 0x68, 0x61, 0x32, 0x35, 0x36, 0x12, 0x24, 0x0a, 0x0e, 0x6d, 0x61, 0x73, 0x74, 0x65, 0x72,
+	0x5f, 0x6b, 0x65, 0x79, 0x5f, 0x6c, 0x6f, 0x67, 0x18, 0x0f, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0c,
+	0x6d, 0x61, 0x73, 0x74, 0x65, 0x72, 0x4b, 0x65, 0x79, 0x4c, 0x6f, 0x67, 0x42, 0x73, 0x0a, 0x1f,
+	0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f,
+	0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x74, 0x6c, 0x73, 0x50,
+	0x01, 0x5a, 0x30, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74,
+	0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61,
+	0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f,
+	0x74, 0x6c, 0x73, 0xaa, 0x02, 0x1b, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73,
+	0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x54, 0x6c,
+	0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/transport/internet/tls/config.proto b/transport/internet/tls/config.proto
index 47fc1b34..b1c26a4c 100644
--- a/transport/internet/tls/config.proto
+++ b/transport/internet/tls/config.proto
@@ -84,5 +84,5 @@ message Config {
   */
   repeated bytes pinned_peer_certificate_public_key_sha256 = 14;
 
-  bool enable_master_key_log = 15;
+  string master_key_log = 15;
 }