)

	// CLI: -A ISTIO_OUTPUT ! -o lo -p udp -m udp --dport 53 -j REDIRECT --to-port 15053
	//
	// DESC: If this is a UDP DNS request to a non-localhost resolver, send it to ztunnel DNS proxy port
	if redirectDNS {
		iptablesBuilder.AppendRule(
			iptableslog.UndefinedCommand, ChainInpodOutput, iptablesconstants.NAT,
			"!", "-o", "lo",
			"-p", "udp",
			"-m", "udp",
			"--dport", "53",

	return forEachLoopbackRoute(cfg, netlink.RouteDel)
}

func forEachLoopbackRoute(cfg *Config, f func(*netlink.Route) error) error {
	loopbackLink, err := netlink.LinkByName("lo")
	if err != nil {
		return fmt.Errorf("failed to find 'lo' link: %v", err)
	}

	// Set up netlink routes for localhost
	cidrs := []string{"0.0.0.0/0"}
	if cfg.EnableIPv6 {
		cidrs = append(cidrs, "0::0/0")
	}