diff --git a/relay/client/dialer/quic/quic.go b/relay/client/dialer/quic/quic.go
index 7fd486f87..3fd48fb19 100644
--- a/relay/client/dialer/quic/quic.go
+++ b/relay/client/dialer/quic/quic.go
@@ -28,6 +28,16 @@ func (d Dialer) Dial(ctx context.Context, address string) (net.Conn, error) {
 		return nil, err
 	}
 
+	// Get the base TLS config
+	tlsClientConfig := quictls.ClientQUICTLSConfig()
+
+	// Set ServerName to hostname if not an IP address
+	host, _, splitErr := net.SplitHostPort(quicURL)
+	if splitErr == nil && net.ParseIP(host) == nil {
+		// It's a hostname, not an IP - modify directly
+		tlsClientConfig.ServerName = host
+	}
+
 	quicConfig := &quic.Config{
 		KeepAlivePeriod:   30 * time.Second,
 		MaxIdleTimeout:    4 * time.Minute,
@@ -47,7 +57,7 @@ func (d Dialer) Dial(ctx context.Context, address string) (net.Conn, error) {
 		return nil, err
 	}
 
-	session, err := quic.Dial(ctx, udpConn, udpAddr, quictls.ClientQUICTLSConfig(), quicConfig)
+	session, err := quic.Dial(ctx, udpConn, udpAddr, tlsClientConfig, quicConfig)
 	if err != nil {
 		if errors.Is(err, context.Canceled) {
 			return nil, err
@@ -61,12 +71,29 @@ func (d Dialer) Dial(ctx context.Context, address string) (net.Conn, error) {
 }
 
 func prepareURL(address string) (string, error) {
-	if !strings.HasPrefix(address, "rel://") && !strings.HasPrefix(address, "rels://") {
+	var host string
+	var defaultPort string
+
+	switch {
+	case strings.HasPrefix(address, "rels://"):
+		host = address[7:]
+		defaultPort = "443"
+	case strings.HasPrefix(address, "rel://"):
+		host = address[6:]
+		defaultPort = "80"
+	default:
 		return "", fmt.Errorf("unsupported scheme: %s", address)
 	}
 
-	if strings.HasPrefix(address, "rels://") {
-		return address[7:], nil
+	finalHost, finalPort, err := net.SplitHostPort(host)
+	if err != nil {
+		if strings.Contains(err.Error(), "missing port") {
+			return host + ":" + defaultPort, nil
+		}
+
+		// return any other split error as is
+		return "", err
 	}
-	return address[6:], nil
+
+	return finalHost + ":" + finalPort, nil
 }