diff --git a/proxy/shadowsocks/protocol.go b/proxy/shadowsocks/protocol.go
index 1b41dc56..45fc1bdc 100644
--- a/proxy/shadowsocks/protocol.go
+++ b/proxy/shadowsocks/protocol.go
@@ -105,7 +105,7 @@ func ReadTCPSession(user *protocol.User, reader io.Reader) (*protocol.RequestHea
 
 	_, err = io.ReadFull(reader, buffer.Value[lenBuffer:lenBuffer+2])
 	if err != nil {
-		return nil, nil, errors.New("Shadowsocks|TCP: Failed to read port: " + err.Error())
+		return nil, nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read port.")
 	}
 
 	request.Port = v2net.PortFromBytes(buffer.Value[lenBuffer : lenBuffer+2])
@@ -115,7 +115,7 @@ func ReadTCPSession(user *protocol.User, reader io.Reader) (*protocol.RequestHea
 		authBytes := buffer.Value[lenBuffer : lenBuffer+AuthSize]
 		_, err = io.ReadFull(reader, authBytes)
 		if err != nil {
-			return nil, nil, errors.New("Shadowsocks|TCP: Failed to read OTA: " + err.Error())
+			return nil, nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read OTA.")
 		}
 
 		actualAuth := authenticator.Authenticate(nil, buffer.Value[0:lenBuffer])
@@ -199,19 +199,19 @@ func WriteTCPRequest(request *protocol.RequestHeader, writer io.Writer) (v2io.Wr
 func ReadTCPResponse(user *protocol.User, reader io.Reader) (v2io.Reader, error) {
 	rawAccount, err := user.GetTypedAccount()
 	if err != nil {
-		return nil, errors.New("Shadowsocks|TCP: Failed to parse account: " + err.Error())
+		return nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to parse account.")
 	}
 	account := rawAccount.(*ShadowsocksAccount)
 
 	iv := make([]byte, account.Cipher.IVSize())
 	_, err = io.ReadFull(reader, iv)
 	if err != nil {
-		return nil, errors.New("Shadowsocks|TCP: Failed to read IV: " + err.Error())
+		return nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to read IV.")
 	}
 
 	stream, err := account.Cipher.NewDecodingStream(account.Key, iv)
 	if err != nil {
-		return nil, errors.New("Shadowsocks|TCP: Failed to initialize decoding stream: " + err.Error())
+		return nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to initialize decoding stream.")
 	}
 	return v2io.NewAdaptiveReader(crypto.NewCryptionReader(stream, reader)), nil
 }
@@ -220,7 +220,7 @@ func WriteTCPResponse(request *protocol.RequestHeader, writer io.Writer) (v2io.W
 	user := request.User
 	rawAccount, err := user.GetTypedAccount()
 	if err != nil {
-		return nil, errors.New("Shadowsocks|TCP: Failed to parse account: " + err.Error())
+		return nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to parse account.")
 	}
 	account := rawAccount.(*ShadowsocksAccount)
 
@@ -228,12 +228,12 @@ func WriteTCPResponse(request *protocol.RequestHeader, writer io.Writer) (v2io.W
 	rand.Read(iv)
 	_, err = writer.Write(iv)
 	if err != nil {
-		return nil, errors.New("Shadowsocks|TCP: Failed to write IV: " + err.Error())
+		return nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to write IV.")
 	}
 
 	stream, err := account.Cipher.NewEncodingStream(account.Key, iv)
 	if err != nil {
-		return nil, errors.New("Shadowsocks|TCP: Failed to create encoding stream: " + err.Error())
+		return nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to create encoding stream.")
 	}
 
 	return v2io.NewAdaptiveWriter(crypto.NewCryptionWriter(stream, writer)), nil
@@ -243,7 +243,7 @@ func EncodeUDPPacket(request *protocol.RequestHeader, payload *alloc.Buffer) (*a
 	user := request.User
 	rawAccount, err := user.GetTypedAccount()
 	if err != nil {
-		return nil, errors.New("Shadowsocks|UDP: Failed to parse account: " + err.Error())
+		return nil, errors.Base(err).Message("Shadowsocks|UDP: Failed to parse account.")
 	}
 	account := rawAccount.(*ShadowsocksAccount)
 
@@ -264,7 +264,7 @@ func EncodeUDPPacket(request *protocol.RequestHeader, payload *alloc.Buffer) (*a
 		buffer.AppendBytes(AddrTypeDomain, byte(len(request.Address.Domain())))
 		buffer.Append([]byte(request.Address.Domain()))
 	default:
-		return nil, errors.New("Shadowsocks|UDP: Unsupported address type. ")
+		return nil, errors.New("Shadowsocks|UDP: Unsupported address type: ", request.Address.Family())
 	}
 
 	buffer.AppendUint16(uint16(request.Port))
@@ -279,7 +279,7 @@ func EncodeUDPPacket(request *protocol.RequestHeader, payload *alloc.Buffer) (*a
 
 	stream, err := account.Cipher.NewEncodingStream(account.Key, iv)
 	if err != nil {
-		return nil, errors.New("Shadowsocks|TCP: Failed to create encoding stream: " + err.Error())
+		return nil, errors.Base(err).Message("Shadowsocks|TCP: Failed to create encoding stream.")
 	}
 
 	stream.XORKeyStream(buffer.Value[ivLen:], buffer.Value[ivLen:])
@@ -289,7 +289,7 @@ func EncodeUDPPacket(request *protocol.RequestHeader, payload *alloc.Buffer) (*a
 func DecodeUDPPacket(user *protocol.User, payload *alloc.Buffer) (*protocol.RequestHeader, *alloc.Buffer, error) {
 	rawAccount, err := user.GetTypedAccount()
 	if err != nil {
-		return nil, nil, errors.New("Shadowsocks|UDP: Failed to parse account: " + err.Error())
+		return nil, nil, errors.Base(err).Message("Shadowsocks|UDP: Failed to parse account.")
 	}
 	account := rawAccount.(*ShadowsocksAccount)
 
@@ -299,7 +299,7 @@ func DecodeUDPPacket(user *protocol.User, payload *alloc.Buffer) (*protocol.Requ
 
 	stream, err := account.Cipher.NewDecodingStream(account.Key, iv)
 	if err != nil {
-		return nil, nil, errors.New("Shadowsocks|UDP: Failed to initialize decoding stream: " + err.Error())
+		return nil, nil, errors.Base(err).Message("Shadowsocks|UDP: Failed to initialize decoding stream.")
 	}
 	stream.XORKeyStream(payload.Value, payload.Value)
 
@@ -349,7 +349,7 @@ func DecodeUDPPacket(user *protocol.User, payload *alloc.Buffer) (*protocol.Requ
 		request.Address = v2net.DomainAddress(string(payload.Value[1 : 1+domainLength]))
 		payload.SliceFrom(1 + domainLength)
 	default:
-		return nil, nil, errors.New("Shadowsocks|UDP: Unknown address type")
+		return nil, nil, errors.New("Shadowsocks|UDP: Unknown address type: ", addrType)
 	}
 
 	request.Port = v2net.PortFromBytes(payload.Value[:2])
diff --git a/proxy/shadowsocks/server.go b/proxy/shadowsocks/server.go
index 55da3d1b..e2a20898 100644
--- a/proxy/shadowsocks/server.go
+++ b/proxy/shadowsocks/server.go
@@ -36,7 +36,7 @@ func NewServer(config *ServerConfig, space app.Space, meta *proxy.InboundHandler
 
 	rawAccount, err := config.User.GetTypedAccount()
 	if err != nil {
-		return nil, errors.New("Shadowsocks|Server: Failed to get user account: " + err.Error())
+		return nil, errors.Base(err).Message("Shadowsocks|Server: Failed to get user account.")
 	}
 	account := rawAccount.(*ShadowsocksAccount)
 
diff --git a/proxy/vmess/encoding/server.go b/proxy/vmess/encoding/server.go
index 261932db..5197ae25 100644
--- a/proxy/vmess/encoding/server.go
+++ b/proxy/vmess/encoding/server.go
@@ -60,7 +60,7 @@ func (v *ServerSession) DecodeRequestHeader(reader io.Reader) (*protocol.Request
 	iv := timestampHash.Sum(nil)
 	account, err := user.GetTypedAccount()
 	if err != nil {
-		return nil, errors.New("VMess|Server: Failed to get user account: " + err.Error())
+		return nil, errors.Base(err).Message("VMess|Server: Failed to get user account.")
 	}
 
 	aesStream := crypto.NewAesDecryptionStream(account.(*vmess.InternalAccount).ID.CmdKey(), iv)
@@ -68,7 +68,7 @@ func (v *ServerSession) DecodeRequestHeader(reader io.Reader) (*protocol.Request
 
 	nBytes, err := io.ReadFull(decryptor, buffer[:41])
 	if err != nil {
-		return nil, errors.New("VMess|Server: Failed to read request header: " + err.Error())
+		return nil, errors.Base(err).Message("VMess|Server: Failed to read request header.")
 	}
 	bufferLen := nBytes
 
@@ -78,8 +78,7 @@ func (v *ServerSession) DecodeRequestHeader(reader io.Reader) (*protocol.Request
 	}
 
 	if request.Version != Version {
-		log.Info("VMess|Server: Invalid protocol version ", request.Version)
-		return nil, protocol.ErrInvalidVersion
+		return nil, errors.New("VMess|Server: Invalid protocol version ", request.Version)
 	}
 
 	v.requestBodyIV = append([]byte(nil), buffer[1:17]...)   // 16 bytes
@@ -95,28 +94,28 @@ func (v *ServerSession) DecodeRequestHeader(reader io.Reader) (*protocol.Request
 		_, err = io.ReadFull(decryptor, buffer[41:45]) // 4 bytes
 		bufferLen += 4
 		if err != nil {
-			return nil, errors.New("VMess|Server: Failed to read IPv4: " + err.Error())
+			return nil, errors.Base(err).Message("VMess|Server: Failed to read IPv4.")
 		}
 		request.Address = v2net.IPAddress(buffer[41:45])
 	case AddrTypeIPv6:
 		_, err = io.ReadFull(decryptor, buffer[41:57]) // 16 bytes
 		bufferLen += 16
 		if err != nil {
-			return nil, errors.New("VMess|Server: Failed to read IPv6 address: " + err.Error())
+			return nil, errors.Base(err).Message("VMess|Server: Failed to read IPv6 address.")
 		}
 		request.Address = v2net.IPAddress(buffer[41:57])
 	case AddrTypeDomain:
 		_, err = io.ReadFull(decryptor, buffer[41:42])
 		if err != nil {
-			return nil, errors.New("VMess:Server: Failed to read domain: " + err.Error())
+			return nil, errors.Base(err).Message("VMess:Server: Failed to read domain.")
 		}
 		domainLength := int(buffer[41])
 		if domainLength == 0 {
-			return nil, errors.New("VMess|Server: Zero domain length.")
+			return nil, errors.New("VMess|Server: Zero length domain.")
 		}
 		_, err = io.ReadFull(decryptor, buffer[42:42+domainLength])
 		if err != nil {
-			return nil, errors.New("VMess|Server: Failed to read domain: " + err.Error())
+			return nil, errors.Base(err).Message("VMess|Server: Failed to read domain.")
 		}
 		bufferLen += 1 + domainLength
 		request.Address = v2net.DomainAddress(string(buffer[42 : 42+domainLength]))
@@ -124,7 +123,7 @@ func (v *ServerSession) DecodeRequestHeader(reader io.Reader) (*protocol.Request
 
 	_, err = io.ReadFull(decryptor, buffer[bufferLen:bufferLen+4])
 	if err != nil {
-		return nil, errors.New("VMess|Server: Failed to read checksum: " + err.Error())
+		return nil, errors.Base(err).Message("VMess|Server: Failed to read checksum.")
 	}
 
 	fnv1a := fnv.New32a()
diff --git a/tools/conf/blackhole.go b/tools/conf/blackhole.go
index 34f06c8c..83333002 100644
--- a/tools/conf/blackhole.go
+++ b/tools/conf/blackhole.go
@@ -28,7 +28,7 @@ func (v *BlackholeConfig) Build() (*loader.TypedSettings, error) {
 	if v.Response != nil {
 		response, _, err := configLoader.Load(v.Response)
 		if err != nil {
-			return nil, errors.New("Blackhole: Failed to parse response config: " + err.Error())
+			return nil, errors.Base(err).Message("Blackhole: Failed to parse response config.")
 		}
 		responseSettings, err := response.(Buildable).Build()
 		if err != nil {
diff --git a/tools/conf/socks.go b/tools/conf/socks.go
index 1bbf0632..dfd962a6 100644
--- a/tools/conf/socks.go
+++ b/tools/conf/socks.go
@@ -79,11 +79,11 @@ func (v *SocksClientConfig) Build() (*loader.TypedSettings, error) {
 		for _, rawUser := range serverConfig.Users {
 			user := new(protocol.User)
 			if err := json.Unmarshal(rawUser, user); err != nil {
-				return nil, errors.New("Socks|Client: Failed to parse user: " + err.Error())
+				return nil, errors.Base(err).Message("Socks|Client: Failed to parse user.")
 			}
 			account := new(SocksAccount)
 			if err := json.Unmarshal(rawUser, account); err != nil {
-				return nil, errors.New("Socks|Client: Failed to parse socks account: " + err.Error())
+				return nil, errors.Base(err).Message("Socks|Client: Failed to parse socks account.")
 			}
 			user.Account = loader.NewTypedSettings(account.Build())
 			server.User = append(server.User, user)
diff --git a/tools/conf/transport.go b/tools/conf/transport.go
index 863459f3..98b1d1cf 100644
--- a/tools/conf/transport.go
+++ b/tools/conf/transport.go
@@ -19,7 +19,7 @@ func (v *TransportConfig) Build() (*transport.Config, error) {
 	if v.TCPConfig != nil {
 		ts, err := v.TCPConfig.Build()
 		if err != nil {
-			return nil, errors.New("Failed to build TCP config: " + err.Error())
+			return nil, errors.Base(err).Message("Failed to build TCP config.")
 		}
 		config.NetworkSettings = append(config.NetworkSettings, &internet.NetworkSettings{
 			Network:  v2net.Network_TCP,
@@ -30,7 +30,7 @@ func (v *TransportConfig) Build() (*transport.Config, error) {
 	if v.KCPConfig != nil {
 		ts, err := v.KCPConfig.Build()
 		if err != nil {
-			return nil, errors.New("Failed to build KCP config: " + err.Error())
+			return nil, errors.Base(err).Message("Failed to build mKCP config.")
 		}
 		config.NetworkSettings = append(config.NetworkSettings, &internet.NetworkSettings{
 			Network:  v2net.Network_KCP,
@@ -41,7 +41,7 @@ func (v *TransportConfig) Build() (*transport.Config, error) {
 	if v.WSConfig != nil {
 		ts, err := v.WSConfig.Build()
 		if err != nil {
-			return nil, errors.New("Failed to build WebSocket config: " + err.Error())
+			return nil, errors.Base(err).Message("Failed to build WebSocket config.")
 		}
 		config.NetworkSettings = append(config.NetworkSettings, &internet.NetworkSettings{
 			Network:  v2net.Network_WebSocket,
diff --git a/tools/conf/transport_internet.go b/tools/conf/transport_internet.go
index 41488a2e..5c40d575 100644
--- a/tools/conf/transport_internet.go
+++ b/tools/conf/transport_internet.go
@@ -84,11 +84,11 @@ func (v *KCPConfig) Build() (*loader.TypedSettings, error) {
 	if len(v.HeaderConfig) > 0 {
 		headerConfig, _, err := kcpHeaderLoader.Load(v.HeaderConfig)
 		if err != nil {
-			return nil, errors.New("KCP|Config: Failed to parse header config: " + err.Error())
+			return nil, errors.Base(err).Message("Invalid mKCP header config.")
 		}
 		ts, err := headerConfig.(Buildable).Build()
 		if err != nil {
-			return nil, errors.New("Failed to get KCP authenticator config: " + err.Error())
+			return nil, errors.Base(err).Message("Invalid mKCP header config.")
 		}
 		config.HeaderConfig = ts
 	}
@@ -111,11 +111,11 @@ func (v *TCPConfig) Build() (*loader.TypedSettings, error) {
 	if len(v.HeaderConfig) > 0 {
 		headerConfig, _, err := tcpHeaderLoader.Load(v.HeaderConfig)
 		if err != nil {
-			return nil, errors.New("TCP|Config: Failed to parse header config: " + err.Error())
+			return nil, errors.Base(err).Message("Invalid TCP header config.")
 		}
 		ts, err := headerConfig.(Buildable).Build()
 		if err != nil {
-			return nil, errors.New("Failed to get TCP authenticator config: " + err.Error())
+			return nil, errors.Base(err).Message("Invalid TCP header config.")
 		}
 		config.HeaderSettings = ts
 	}
@@ -155,11 +155,11 @@ func (v *TLSConfig) Build() (*loader.TypedSettings, error) {
 	for idx, certConf := range v.Certs {
 		cert, err := ioutil.ReadFile(certConf.CertFile)
 		if err != nil {
-			return nil, errors.New("TLS: Failed to load certificate file: " + err.Error())
+			return nil, errors.Base(err).Message("Failed to load TLS certificate file: ", certConf.CertFile)
 		}
 		key, err := ioutil.ReadFile(certConf.KeyFile)
 		if err != nil {
-			return nil, errors.New("TLS: Failed to load key file: " + err.Error())
+			return nil, errors.Base(err).Message("Failed to load TLS key file: ", certConf.KeyFile)
 		}
 		config.Certificate[idx] = &tls.Certificate{
 			Key:         key,
@@ -193,14 +193,14 @@ func (v *StreamConfig) Build() (*internet.StreamConfig, error) {
 		}
 		ts, err := tlsSettings.Build()
 		if err != nil {
-			return nil, errors.New("Failed to build TLS config: " + err.Error())
+			return nil, errors.Base(err).Message("Failed to build TLS config.")
 		}
 		config.SecuritySettings = append(config.SecuritySettings, ts)
 	}
 	if v.TCPSettings != nil {
 		ts, err := v.TCPSettings.Build()
 		if err != nil {
-			return nil, errors.New("Failed to build TCP config: " + err.Error())
+			return nil, errors.Base(err).Message("Failed to build TCP config.")
 		}
 		config.NetworkSettings = append(config.NetworkSettings, &internet.NetworkSettings{
 			Network:  v2net.Network_TCP,
@@ -210,7 +210,7 @@ func (v *StreamConfig) Build() (*internet.StreamConfig, error) {
 	if v.KCPSettings != nil {
 		ts, err := v.KCPSettings.Build()
 		if err != nil {
-			return nil, errors.New("Failed to build KCP config: " + err.Error())
+			return nil, errors.Base(err).Message("Failed to build mKCP config.")
 		}
 		config.NetworkSettings = append(config.NetworkSettings, &internet.NetworkSettings{
 			Network:  v2net.Network_KCP,
@@ -220,7 +220,7 @@ func (v *StreamConfig) Build() (*internet.StreamConfig, error) {
 	if v.WSSettings != nil {
 		ts, err := v.WSSettings.Build()
 		if err != nil {
-			return nil, errors.New("Failed to build WebSocket config: " + err.Error())
+			return nil, errors.Base(err).Message("Failed to build WebSocket config.")
 		}
 		config.NetworkSettings = append(config.NetworkSettings, &internet.NetworkSettings{
 			Network:  v2net.Network_WebSocket,
diff --git a/tools/conf/v2ray.go b/tools/conf/v2ray.go
index f1e0b4a7..93262f28 100644
--- a/tools/conf/v2ray.go
+++ b/tools/conf/v2ray.go
@@ -60,7 +60,7 @@ func (v *InboundConnectionConfig) Build() (*core.InboundConnectionConfig, error)
 
 	jsonConfig, err := inboundConfigLoader.LoadWithID(v.Settings, v.Protocol)
 	if err != nil {
-		return nil, errors.New("Failed to load inbound config: " + err.Error())
+		return nil, errors.Base(err).Message("Failed to load inbound config.")
 	}
 	ts, err := jsonConfig.(Buildable).Build()
 	if err != nil {
@@ -86,7 +86,7 @@ func (v *OutboundConnectionConfig) Build() (*core.OutboundConnectionConfig, erro
 	config := new(core.OutboundConnectionConfig)
 	rawConfig, err := outboundConfigLoader.LoadWithID(v.Settings, v.Protocol)
 	if err != nil {
-		return nil, errors.New("Failed to parse outbound config: " + err.Error())
+		return nil, errors.Base(err).Message("Failed to parse outbound config.")
 	}
 	ts, err := rawConfig.(Buildable).Build()
 	if err != nil {
@@ -97,7 +97,7 @@ func (v *OutboundConnectionConfig) Build() (*core.OutboundConnectionConfig, erro
 	if v.SendThrough != nil {
 		address := v.SendThrough
 		if address.Family().IsDomain() {
-			return nil, errors.New("Point: Unable to send through: " + address.String())
+			return nil, errors.New("Invalid sendThrough address: " + address.String())
 		}
 		config.SendThrough = address.Build()
 	}
@@ -111,7 +111,7 @@ func (v *OutboundConnectionConfig) Build() (*core.OutboundConnectionConfig, erro
 	if v.ProxySettings != nil {
 		ps, err := v.ProxySettings.Build()
 		if err != nil {
-			return nil, errors.New("Outbound: invalid proxy settings: " + err.Error())
+			return nil, errors.Base(err).Message("Invalid outbound proxy settings.")
 		}
 		config.ProxySettings = ps
 	}
@@ -137,7 +137,7 @@ func (v *InboundDetourAllocationConfig) Build() (*core.AllocationStrategy, error
 	case "external":
 		config.Type = core.AllocationStrategy_External
 	default:
-		return nil, errors.New("Unknown allocation strategy: " + v.Strategy)
+		return nil, errors.New("Unknown allocation strategy: ", v.Strategy)
 	}
 	if v.Concurrency != nil {
 		config.Concurrency = &core.AllocationStrategyConcurrency{
@@ -168,13 +168,13 @@ type InboundDetourConfig struct {
 func (v *InboundDetourConfig) Build() (*core.InboundConnectionConfig, error) {
 	config := new(core.InboundConnectionConfig)
 	if v.PortRange == nil {
-		return nil, errors.New("Point: Port range not specified in InboundDetour.")
+		return nil, errors.New("Port range not specified in InboundDetour.")
 	}
 	config.PortRange = v.PortRange.Build()
 
 	if v.ListenOn != nil {
 		if v.ListenOn.Family().IsDomain() {
-			return nil, errors.New("Point: Unable to listen on domain address: " + v.ListenOn.Domain())
+			return nil, errors.New("Unable to listen on domain address: ", v.ListenOn.Domain())
 		}
 		config.ListenOn = v.ListenOn.Build()
 	}
@@ -197,7 +197,7 @@ func (v *InboundDetourConfig) Build() (*core.InboundConnectionConfig, error) {
 
 	rawConfig, err := inboundConfigLoader.LoadWithID(v.Settings, v.Protocol)
 	if err != nil {
-		return nil, errors.New("Failed to load inbound detour config: " + err.Error())
+		return nil, errors.Base(err).Message("Failed to load inbound detour config.")
 	}
 	ts, err := rawConfig.(Buildable).Build()
 	if err != nil {
@@ -238,7 +238,7 @@ func (v *OutboundDetourConfig) Build() (*core.OutboundConnectionConfig, error) {
 
 	rawConfig, err := outboundConfigLoader.LoadWithID(v.Settings, v.Protocol)
 	if err != nil {
-		return nil, errors.New("Failed to parse to outbound detour config: " + err.Error())
+		return nil, errors.Base(err).Message("Failed to parse to outbound detour config.")
 	}
 	ts, err := rawConfig.(Buildable).Build()
 	if err != nil {
@@ -248,7 +248,7 @@ func (v *OutboundDetourConfig) Build() (*core.OutboundConnectionConfig, error) {
 	if v.ProxySettings != nil {
 		ps, err := v.ProxySettings.Build()
 		if err != nil {
-			return nil, errors.New("OutboundDetour: invalid proxy settings: " + err.Error())
+			return nil, errors.Base(err).Message("Invalid outbound detour proxy settings.")
 		}
 		config.ProxySettings = ps
 	}
@@ -340,7 +340,7 @@ func init() {
 		decoder := json.NewDecoder(input)
 		err := decoder.Decode(jsonConfig)
 		if err != nil {
-			return nil, errors.New("Point: Failed to load server config: " + err.Error())
+			return nil, errors.Base(err).Message("Invalid V2Ray config.")
 		}
 
 		return jsonConfig.Build()
diff --git a/tools/conf/vmess.go b/tools/conf/vmess.go
index cfd3e7df..03db3524 100644
--- a/tools/conf/vmess.go
+++ b/tools/conf/vmess.go
@@ -77,11 +77,11 @@ func (v *VMessInboundConfig) Build() (*loader.TypedSettings, error) {
 	for idx, rawData := range v.Users {
 		user := new(protocol.User)
 		if err := json.Unmarshal(rawData, user); err != nil {
-			return nil, errors.New("VMess|Inbound: Invalid user: " + err.Error())
+			return nil, errors.Base(err).Message("Invalid VMess user.")
 		}
 		account := new(VMessAccount)
 		if err := json.Unmarshal(rawData, account); err != nil {
-			return nil, errors.New("VMess|Inbound: Invalid user: " + err.Error())
+			return nil, errors.Base(err).Message("Invalid VMess user.")
 		}
 		user.Account = loader.NewTypedSettings(account.Build())
 		config.User[idx] = user
@@ -123,11 +123,11 @@ func (v *VMessOutboundConfig) Build() (*loader.TypedSettings, error) {
 		for _, rawUser := range rec.Users {
 			user := new(protocol.User)
 			if err := json.Unmarshal(rawUser, user); err != nil {
-				return nil, errors.New("VMess|Outbound: Invalid user: " + err.Error())
+				return nil, errors.Base(err).Message("Invalid VMess user.")
 			}
 			account := new(VMessAccount)
 			if err := json.Unmarshal(rawUser, account); err != nil {
-				return nil, errors.New("VMess|Outbound: Invalid user: " + err.Error())
+				return nil, errors.Base(err).Message("Invalid VMess user.")
 			}
 			user.Account = loader.NewTypedSettings(account.Build())
 			spec.User = append(spec.User, user)
diff --git a/transport/internet/tcp/dialer.go b/transport/internet/tcp/dialer.go
index 0a82aee0..11473d67 100644
--- a/transport/internet/tcp/dialer.go
+++ b/transport/internet/tcp/dialer.go
@@ -55,11 +55,11 @@ func Dial(src v2net.Address, dest v2net.Destination, options internet.DialerOpti
 		if tcpSettings.HeaderSettings != nil {
 			headerConfig, err := tcpSettings.HeaderSettings.GetInstance()
 			if err != nil {
-				return nil, errors.New("TCP: Failed to get header settings: " + err.Error())
+				return nil, errors.Base(err).Message("Interent|TCP: Failed to get header settings.")
 			}
 			auth, err := internet.CreateConnectionAuthenticator(tcpSettings.HeaderSettings.Type, headerConfig)
 			if err != nil {
-				return nil, errors.New("TCP: Failed to create header authenticator: " + err.Error())
+				return nil, errors.Base(err).Message("Internet|TCP: Failed to create header authenticator.")
 			}
 			conn = auth.Client(conn)
 		}
diff --git a/transport/internet/tcp/hub.go b/transport/internet/tcp/hub.go
index 811978c1..6ed346f4 100644
--- a/transport/internet/tcp/hub.go
+++ b/transport/internet/tcp/hub.go
@@ -66,11 +66,11 @@ func ListenTCP(address v2net.Address, port v2net.Port, options internet.ListenOp
 	if tcpSettings.HeaderSettings != nil {
 		headerConfig, err := tcpSettings.HeaderSettings.GetInstance()
 		if err != nil {
-			return nil, errors.New("TCP: Failed to get header settings: " + err.Error())
+			return nil, errors.Base(err).Message("Internet|TCP: Invalid header settings.")
 		}
 		auth, err := internet.CreateConnectionAuthenticator(tcpSettings.HeaderSettings.Type, headerConfig)
 		if err != nil {
-			return nil, errors.New("TCP: Failed to create header authenticator: " + err.Error())
+			return nil, errors.Base(err).Message("Internet|TCP: Invalid header settings.")
 		}
 		l.authConfig = auth
 	}
diff --git a/transport/internet/ws/wsconn.go b/transport/internet/ws/wsconn.go
index b63dd93e..255e7439 100644
--- a/transport/internet/ws/wsconn.go
+++ b/transport/internet/ws/wsconn.go
@@ -42,7 +42,7 @@ func (ws *wsconn) read(b []byte) (n int, err error) {
 func (ws *wsconn) getNewReadBuffer() error {
 	_, r, err := ws.wsc.NextReader()
 	if err != nil {
-		log.Warning("WS transport: ws connection NewFrameReader return " + err.Error())
+		log.Warning("WS transport: ws connection NewFrameReader return ", err)
 		ws.connClosing = true
 		ws.Close()
 		return err
@@ -90,7 +90,7 @@ func (ws *wsconn) Write(b []byte) (n int, err error) {
 func (ws *wsconn) write(b []byte) (n int, err error) {
 	wr, err := ws.wsc.NextWriter(websocket.BinaryMessage)
 	if err != nil {
-		log.Warning("WS transport: ws connection NewFrameReader return " + err.Error())
+		log.Warning("WS transport: ws connection NewFrameReader return ", err)
 		ws.connClosing = true
 		ws.Close()
 		return 0, err