diff --git a/modules/discovery/discovery.go b/modules/discovery/discovery.go
new file mode 100644
index 0000000..07bed88
--- /dev/null
+++ b/modules/discovery/discovery.go
@@ -0,0 +1,8 @@
+package discovery
+
+const (
+	PortTypeTCP = "TCP"
+	PortTypeUDP = "UDP"
+
+	CryptoTypeTLS = "TLS"
+)