diff --git a/pkg/proxy/userspace/proxier.go b/pkg/proxy/userspace/proxier.go
index 7a34529d6ff..0345a553489 100644
--- a/pkg/proxy/userspace/proxier.go
+++ b/pkg/proxy/userspace/proxier.go
@@ -127,6 +127,7 @@ type Proxier struct {
 	listenIP        net.IP
 	iptables        iptables.Interface
 	hostIP          net.IP
+	localAddrs      []net.IP
 	proxyPorts      PortAllocator
 	makeProxySocket ProxySocketFunc
 	exec            utilexec.Interface
@@ -371,6 +372,14 @@ func (proxier *Proxier) syncProxyRules() {
 		proxier.unmergeService(change.previous, existingPorts)
 	}
 
+	localAddrs, err := utilproxy.GetLocalAddrs()
+	if err != nil {
+		klog.Errorf("Failed to get local addresses during proxy sync: %s, assuming IPs are not local", err)
+	} else if len(localAddrs) == 0 {
+		klog.Warning("No local addresses were found, assuming all external IPs are not local")
+	}
+	proxier.localAddrs = localAddrs
+
 	proxier.ensurePortals()
 	proxier.cleanupStaleStickySessions()
 }
@@ -725,9 +734,7 @@ func (proxier *Proxier) openPortal(service proxy.ServicePortName, info *ServiceI
 }
 
 func (proxier *Proxier) openOnePortal(portal portal, protocol v1.Protocol, proxyIP net.IP, proxyPort int, name proxy.ServicePortName) error {
-	if local, err := utilproxy.IsLocalIP(portal.ip.String()); err != nil {
-		return fmt.Errorf("can't determine if IP %s is local, assuming not: %v", portal.ip, err)
-	} else if local {
+	if len(proxier.localAddrs) > 0 && utilproxy.ContainsIP(proxier.localAddrs, portal.ip) {
 		err := proxier.claimNodePort(portal.ip, portal.port, protocol, name)
 		if err != nil {
 			return err
@@ -903,10 +910,7 @@ func (proxier *Proxier) closePortal(service proxy.ServicePortName, info *Service
 
 func (proxier *Proxier) closeOnePortal(portal portal, protocol v1.Protocol, proxyIP net.IP, proxyPort int, name proxy.ServicePortName) []error {
 	el := []error{}
-
-	if local, err := utilproxy.IsLocalIP(portal.ip.String()); err != nil {
-		el = append(el, fmt.Errorf("can't determine if IP %s is local, assuming not: %v", portal.ip, err))
-	} else if local {
+	if len(proxier.localAddrs) > 0 && utilproxy.ContainsIP(proxier.localAddrs, portal.ip) {
 		if err := proxier.releaseNodePort(portal.ip, portal.port, protocol, name); err != nil {
 			el = append(el, err)
 		}