diff --git a/internal/config/config.go b/internal/config/config.go
index fdf3ee97..a7d7bafb 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -11,6 +11,7 @@ import (
 	"strings"
 
 	"github.com/NHAS/wag/internal/acls"
+	"github.com/NHAS/wag/internal/data/validators"
 	"github.com/NHAS/wag/internal/routetypes"
 	"github.com/NHAS/wag/pkg/control"
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
@@ -242,7 +243,7 @@ func load(path string) (c Config, err error) {
 		*c.NAT = true
 	}
 
-	err = validExternalAddresses(c.ExternalAddress)
+	err = validators.ValidExternalAddresses(c.ExternalAddress)
 	if err != nil {
 		return c, err
 	}
@@ -365,26 +366,6 @@ func validateDns(input []string) (newDnsEntries []string, err error) {
 	return
 }
 
-func validExternalAddresses(ExternalAddress string) error {
-	if len(ExternalAddress) == 0 {
-		return errors.New("invalid ExternalAddress is empty")
-	}
-
-	if net.ParseIP(ExternalAddress) == nil {
-
-		addresses, err := net.LookupIP(ExternalAddress)
-		if err != nil {
-			return errors.New("invalid ExternalAddress: " + ExternalAddress + " unable to lookup as domain")
-		}
-
-		if len(addresses) == 0 {
-			return errors.New("invalid ExternalAddress: " + ExternalAddress + " not IPv4 or IPv6 external addresses found")
-		}
-	}
-
-	return nil
-}
-
 func Load(path string) error {
 
 	var err error
diff --git a/internal/data/config.go b/internal/data/config.go
index 45f683da..f2547f04 100644
--- a/internal/data/config.go
+++ b/internal/data/config.go
@@ -8,6 +8,7 @@ import (
 	"net/url"
 	"strings"
 
+	"github.com/NHAS/wag/internal/data/validators"
 	clientv3 "go.etcd.io/etcd/client/v3"
 )
 
@@ -285,6 +286,11 @@ func GetHelpMail() string {
 }
 
 func SetExternalAddress(externalAddress string) error {
+
+	if err := validators.ValidExternalAddresses(externalAddress); err != nil {
+		return err
+	}
+
 	data, _ := json.Marshal(externalAddress)
 	_, err := etcd.Put(context.Background(), externalAddressKey, string(data))
 	return err
diff --git a/internal/data/validators/config.go b/internal/data/validators/config.go
new file mode 100644
index 00000000..b51a8d06
--- /dev/null
+++ b/internal/data/validators/config.go
@@ -0,0 +1,31 @@
+package validators
+
+import (
+	"errors"
+	"net"
+)
+
+func ValidExternalAddresses(ExternalAddress string) error {
+	if len(ExternalAddress) == 0 {
+		return errors.New("invalid ExternalAddress is empty")
+	}
+
+	host, _, err := net.SplitHostPort(ExternalAddress)
+	if err == nil {
+		// If the external address has a port, split it off and use that as the external address to check
+		ExternalAddress = host
+	}
+
+	if net.ParseIP(ExternalAddress) == nil {
+
+		addresses, err := net.LookupIP(ExternalAddress)
+		if err != nil {
+			return errors.New("invalid ExternalAddress: " + ExternalAddress + " unable to lookup as domain")
+		}
+
+		if len(addresses) == 0 {
+			return errors.New("invalid ExternalAddress: " + ExternalAddress + " not IPv4 or IPv6 external addresses found")
+		}
+	}
+	return nil
+}
diff --git a/internal/utils/utils.go b/internal/utils/utils.go
index 1b2ed4f3..04ec1862 100644
--- a/internal/utils/utils.go
+++ b/internal/utils/utils.go
@@ -15,6 +15,7 @@ func GetIP(addr string) string {
 			return addr[:i]
 		}
 	}
+
 	return addr
 }
 
diff --git a/internal/webserver/web.go b/internal/webserver/web.go
index 8ce4d9fe..fc48602a 100644
--- a/internal/webserver/web.go
+++ b/internal/webserver/web.go
@@ -511,7 +511,7 @@ func registerDevice(w http.ResponseWriter, r *http.Request) {
 
 	acl := data.GetEffectiveAcl(username)
 
-	wgPublicKey, _, err := router.ServerDetails()
+	wgPublicKey, wgPort, err := router.ServerDetails()
 	if err != nil {
 		log.Println(username, remoteAddr, "unable access wireguard device: ", err)
 		http.Error(w, "Server Error", 500)
@@ -558,13 +558,21 @@ func registerDevice(w http.ResponseWriter, r *http.Request) {
 		ClientPresharedKey: presharedKey,
 	}
 
-	wireguardInterface.ServerAddress, err = data.GetExternalAddress()
+	externalAddress, err := data.GetExternalAddress()
 	if err != nil {
 		log.Println(username, remoteAddr, "unable to get server external address from datastore: ", err)
 		http.Error(w, "Server Error", 500)
 		return
 	}
 
+	// If the external address defined in the config has a port, use that, otherwise defaultly add the same port as the wireguard device
+	_, _, err = net.SplitHostPort(externalAddress)
+	if err != nil {
+		externalAddress = fmt.Sprintf("%s:%d", externalAddress, wgPort)
+	}
+
+	wireguardInterface.ServerAddress = externalAddress
+
 	if r.URL.Query().Get("type") == "mobile" {
 		w.Header().Set("Content-Type", "text/html; charset=UTF-8")