detect ipv6

weed/util/network.go

@@ -43,7 +43,7 @@ func selectIpV4(netInterfaces []net.Interface, isIpV4 bool) string {
 						return ipNet.IP.String()
 					}
 				} else {
-					if ipNet.IP.To16() != nil {
+					if ipNet.IP.To4() == nil && ipNet.IP.To16() != nil {
 						// Filter out link-local IPv6 addresses (fe80::/10)
 						// They require zone identifiers and are not suitable for server binding
 						if !ipNet.IP.IsLinkLocalUnicast() {