diff --git a/generator.go b/generator.go
index f357befb..c567e12c 100644
--- a/generator.go
+++ b/generator.go
@@ -397,21 +397,34 @@ func (g *generator) getContainers() ([]*RuntimeContainer, error) {
 			IP6LinkLocal: container.NetworkSettings.LinkLocalIPv6Address,
 			IP6Global:    container.NetworkSettings.GlobalIPv6Address,
 		}
-		for k, v := range container.NetworkSettings.Ports {
-			address := Address{
-				IP:           container.NetworkSettings.IPAddress,
-				IP6LinkLocal: container.NetworkSettings.LinkLocalIPv6Address,
-				IP6Global:    container.NetworkSettings.GlobalIPv6Address,
-				Port:         k.Port(),
-				Proto:        k.Proto(),
+		if len(container.NetworkSettings.Ports) > 0 {
+			for k, v := range container.NetworkSettings.Ports {
+				address := Address{
+					IP:           container.NetworkSettings.IPAddress,
+					IP6LinkLocal: container.NetworkSettings.LinkLocalIPv6Address,
+					IP6Global:    container.NetworkSettings.GlobalIPv6Address,
+					Port:         k.Port(),
+					Proto:        k.Proto(),
+				}
+				if len(v) > 0 {
+					address.HostPort = v[0].HostPort
+					address.HostIP = v[0].HostIP
+				}
+				runtimeContainer.Addresses = append(runtimeContainer.Addresses,
+					address)
 			}
-			if len(v) > 0 {
-				address.HostPort = v[0].HostPort
-				address.HostIP = v[0].HostIP
+		} else if len(container.Config.ExposedPorts) > 0 { // internal docker network has empty 'container.NetworkSettings.Ports'
+			for k := range container.Config.ExposedPorts {
+				address := Address{
+					IP:           container.NetworkSettings.IPAddress,
+					IP6LinkLocal: container.NetworkSettings.LinkLocalIPv6Address,
+					IP6Global:    container.NetworkSettings.GlobalIPv6Address,
+					Port:         k.Port(),
+					Proto:        k.Proto(),
+				}
+				runtimeContainer.Addresses = append(runtimeContainer.Addresses,
+					address)
 			}
-			runtimeContainer.Addresses = append(runtimeContainer.Addresses,
-				address)
-
 		}
 		for k, v := range container.NetworkSettings.Networks {
 			network := Network{