diff --git a/1.7/client/network.go b/1.7/client/network.go
new file mode 100644
index 0000000..e9a41fb
--- /dev/null
+++ b/1.7/client/network.go
@@ -0,0 +1,15 @@
+package utils
+
+import "net"
+
+func IPv6(ip string) bool {
+	return net.ParseIP(ip) != nil && net.ParseIP(ip).To4() == nil
+}
+
+func DefaultSubnet(ip string) string {
+	if IPv6(ip) {
+		return "64"
+	}
+	return "24"
+}
+