diff --git a/README.md b/README.md
index a260213cb..66dab4529 100644
--- a/README.md
+++ b/README.md
@@ -120,7 +120,7 @@ Want more testing? ▶ [see the Wiki](https://github.com/qdm12/gluetun/wiki/Test
     | `COUNTRY` | | One of the [Mullvad countries](https://mullvad.net/en/servers/#openvpn) | VPN server country |
     | `CITY` | | One of the [Mullvad cities](https://mullvad.net/en/servers/#openvpn) | VPN server city |
     | `ISP` | | One of the [Mullvad ISP](https://mullvad.net/en/servers/#openvpn) | VPN server ISP |
-    | `PORT` | | `80` or `443` for TCP; or `53` for UDP. Leave blank for default Mullvad server port | Custom VPN port to use |
+    | `PORT` | | `80`, `443` or `1401` for TCP; `53`, `1194`, `1195`, `1196`, `1197`, `1300`, `1301`, `1302`, `1303` or `1400` for UDP. Defaults to TCP `443` and UDP `1194` | Custom VPN port to use |
 
 - Windscribe
 
diff --git a/internal/constants/mullvad.go b/internal/constants/mullvad.go
index 95b3b39d4..1ddd80874 100644
--- a/internal/constants/mullvad.go
+++ b/internal/constants/mullvad.go
@@ -56,604 +56,520 @@ func MullvadISPChoices() (choices []string) {
 func MullvadServers() []models.MullvadServer {
 	return []models.MullvadServer{
 		{
-			Country:     "united arab emirates",
-			City:        "dubai",
-			ISP:         "m247",
-			IPs:         []net.IP{{45, 9, 249, 34}},
-			DefaultPort: 1194,
+			Country: "united arab emirates",
+			City:    "dubai",
+			ISP:     "m247",
+			IPs:     []net.IP{{45, 9, 249, 34}},
 		},
 		{
-			Country:     "albania",
-			City:        "tirana",
-			ISP:         "iregister",
-			IPs:         []net.IP{{31, 171, 154, 210}},
-			DefaultPort: 1197,
+			Country: "albania",
+			City:    "tirana",
+			ISP:     "iregister",
+			IPs:     []net.IP{{31, 171, 154, 210}},
 		},
 		{
-			Country:     "austria",
-			City:        "wien",
-			ISP:         "m247",
-			IPs:         []net.IP{{37, 120, 155, 250}, {217, 64, 127, 138}, {217, 64, 127, 202}},
-			DefaultPort: 1196,
+			Country: "austria",
+			City:    "wien",
+			ISP:     "m247",
+			IPs:     []net.IP{{37, 120, 155, 250}, {217, 64, 127, 138}, {217, 64, 127, 202}},
 		},
 		{
-			Country:     "australia",
-			City:        "adelaide",
-			ISP:         "intergrid",
-			IPs:         []net.IP{{116, 206, 231, 58}},
-			DefaultPort: 1300,
+			Country: "australia",
+			City:    "adelaide",
+			ISP:     "intergrid",
+			IPs:     []net.IP{{116, 206, 231, 58}},
 		},
 		{
-			Country:     "australia",
-			City:        "brisbane",
-			ISP:         "intergrid",
-			IPs:         []net.IP{{43, 245, 160, 162}},
-			DefaultPort: 1300,
+			Country: "australia",
+			City:    "brisbane",
+			ISP:     "intergrid",
+			IPs:     []net.IP{{43, 245, 160, 162}},
 		},
 		{
-			Country:     "australia",
-			City:        "canberra",
-			ISP:         "intergrid",
-			IPs:         []net.IP{{116, 206, 229, 98}},
-			DefaultPort: 1300,
+			Country: "australia",
+			City:    "canberra",
+			ISP:     "intergrid",
+			IPs:     []net.IP{{116, 206, 229, 98}},
 		},
 		{
-			Country:     "australia",
-			City:        "melbourne",
-			ISP:         "intergrid",
-			IPs:         []net.IP{{116, 206, 228, 202}, {116, 206, 228, 242}, {116, 206, 230, 98}},
-			DefaultPort: 1300,
+			Country: "australia",
+			City:    "melbourne",
+			ISP:     "intergrid",
+			IPs:     []net.IP{{116, 206, 228, 202}, {116, 206, 228, 242}, {116, 206, 230, 98}},
 		},
 		{
-			Country:     "australia",
-			City:        "perth",
-			ISP:         "intergrid",
-			IPs:         []net.IP{{103, 77, 235, 66}},
-			DefaultPort: 1300,
+			Country: "australia",
+			City:    "perth",
+			ISP:     "intergrid",
+			IPs:     []net.IP{{103, 77, 235, 66}},
 		},
 		{
-			Country:     "australia",
-			City:        "sydney",
-			ISP:         "intergrid",
-			IPs:         []net.IP{{43, 245, 162, 130}, {103, 77, 232, 130}, {103, 77, 232, 146}},
-			DefaultPort: 1300,
+			Country: "australia",
+			City:    "sydney",
+			ISP:     "intergrid",
+			IPs:     []net.IP{{43, 245, 162, 130}, {103, 77, 232, 130}, {103, 77, 232, 146}},
 		},
 		{
-			Country:     "australia",
-			City:        "sydney",
-			ISP:         "m247",
-			IPs:         []net.IP{{217, 138, 204, 82}, {217, 138, 204, 98}, {217, 138, 204, 66}},
-			DefaultPort: 1300,
+			Country: "australia",
+			City:    "sydney",
+			ISP:     "m247",
+			IPs:     []net.IP{{217, 138, 204, 82}, {217, 138, 204, 98}, {217, 138, 204, 66}},
 		},
 		{
-			Country:     "belgium",
-			City:        "brussels",
-			ISP:         "m247",
-			IPs:         []net.IP{{37, 120, 218, 146}, {37, 120, 218, 138}, {91, 207, 57, 50}, {37, 120, 143, 138}, {185, 104, 186, 202}},
-			DefaultPort: 1300,
+			Country: "belgium",
+			City:    "brussels",
+			ISP:     "m247",
+			IPs:     []net.IP{{37, 120, 218, 146}, {37, 120, 218, 138}, {91, 207, 57, 50}, {37, 120, 143, 138}, {185, 104, 186, 202}},
 		},
 		{
-			Country:     "bulgaria",
-			City:        "sofia",
-			ISP:         "m247",
-			IPs:         []net.IP{{185, 94, 192, 42}, {185, 94, 192, 66}},
-			DefaultPort: 1300,
+			Country: "bulgaria",
+			City:    "sofia",
+			ISP:     "m247",
+			IPs:     []net.IP{{185, 94, 192, 42}, {185, 94, 192, 66}},
 		},
 		{
-			Country:     "brazil",
-			City:        "sao paulo",
-			ISP:         "qnax",
-			IPs:         []net.IP{{191, 101, 62, 178}},
-			DefaultPort: 1301,
+			Country: "brazil",
+			City:    "sao paulo",
+			ISP:     "qnax",
+			IPs:     []net.IP{{191, 101, 62, 178}},
 		},
 		{
-			Country:     "brazil",
-			City:        "sao paulo",
-			ISP:         "heficed",
-			IPs:         []net.IP{{177, 67, 80, 186}},
-			DefaultPort: 1300,
+			Country: "brazil",
+			City:    "sao paulo",
+			ISP:     "heficed",
+			IPs:     []net.IP{{177, 67, 80, 186}},
 		},
 		{
-			Country:     "canada",
-			City:        "montreal",
-			ISP:         "m247",
-			IPs:         []net.IP{{139, 28, 218, 114}, {217, 138, 200, 194}, {217, 138, 200, 186}, {87, 101, 92, 146}, {176, 113, 74, 178}, {37, 120, 205, 114}, {87, 101, 92, 138}, {37, 120, 205, 122}, {217, 138, 200, 210}, {217, 138, 200, 202}},
-			DefaultPort: 1300,
+			Country: "canada",
+			City:    "montreal",
+			ISP:     "m247",
+			IPs:     []net.IP{{139, 28, 218, 114}, {217, 138, 200, 194}, {217, 138, 200, 186}, {87, 101, 92, 146}, {176, 113, 74, 178}, {37, 120, 205, 114}, {87, 101, 92, 138}, {37, 120, 205, 122}, {217, 138, 200, 210}, {217, 138, 200, 202}},
 		},
 		{
-			Country:     "canada",
-			City:        "toronto",
-			ISP:         "amanah",
-			IPs:         []net.IP{{184, 75, 214, 130}, {162, 219, 176, 250}},
-			DefaultPort: 1300,
+			Country: "canada",
+			City:    "toronto",
+			ISP:     "amanah",
+			IPs:     []net.IP{{184, 75, 214, 130}, {162, 219, 176, 250}},
 		},
 		{
-			Country:     "canada",
-			City:        "vancouver",
-			ISP:         "100tb",
-			IPs:         []net.IP{{172, 83, 40, 34}, {172, 83, 40, 38}},
-			DefaultPort: 1300,
+			Country: "canada",
+			City:    "vancouver",
+			ISP:     "100tb",
+			IPs:     []net.IP{{172, 83, 40, 34}, {172, 83, 40, 38}},
 		},
 		{
-			Country:     "canada",
-			City:        "vancouver",
-			ISP:         "esecuredata",
-			IPs:         []net.IP{{71, 19, 249, 81}, {176, 113, 74, 186}, {71, 19, 248, 240}},
-			DefaultPort: 1300,
+			Country: "canada",
+			City:    "vancouver",
+			ISP:     "esecuredata",
+			IPs:     []net.IP{{71, 19, 249, 81}, {176, 113, 74, 186}, {71, 19, 248, 240}},
 		},
 		{
-			Country:     "switzerland",
-			City:        "zurich",
-			ISP:         "31173",
-			IPs:         []net.IP{{193, 32, 127, 82}, {193, 32, 127, 81}, {193, 32, 127, 83}, {193, 32, 127, 84}},
-			Owned:       true,
-			DefaultPort: 1301,
+			Country: "switzerland",
+			City:    "zurich",
+			ISP:     "31173",
+			IPs:     []net.IP{{193, 32, 127, 82}, {193, 32, 127, 81}, {193, 32, 127, 83}, {193, 32, 127, 84}},
+			Owned:   true,
 		},
 		{
-			Country:     "zwitzerland",
-			City:        "zurich",
-			ISP:         "m247",
-			IPs:         []net.IP{{185, 212, 170, 50}, {185, 183, 104, 82}, {185, 9, 18, 98}, {82, 102, 24, 130}, {82, 102, 24, 186}, {185, 212, 170, 162}, {185, 9, 18, 114}},
-			DefaultPort: 1301,
+			Country: "zwitzerland",
+			City:    "zurich",
+			ISP:     "m247",
+			IPs:     []net.IP{{185, 212, 170, 50}, {185, 183, 104, 82}, {185, 9, 18, 98}, {82, 102, 24, 130}, {82, 102, 24, 186}, {185, 212, 170, 162}, {185, 9, 18, 114}},
 		},
 		{
-			Country:     "switzerland",
-			City:        "zurich",
-			ISP:         "privateLayer",
-			IPs:         []net.IP{{179, 43, 128, 170}, {81, 17, 20, 34}},
-			DefaultPort: 1301,
+			Country: "switzerland",
+			City:    "zurich",
+			ISP:     "privateLayer",
+			IPs:     []net.IP{{179, 43, 128, 170}, {81, 17, 20, 34}},
 		},
 		{
-			Country:     "czech republic",
-			City:        "prague",
-			ISP:         "m247",
-			IPs:         []net.IP{{217, 138, 199, 82}, {217, 138, 199, 74}},
-			DefaultPort: 1197,
+			Country: "czech republic",
+			City:    "prague",
+			ISP:     "m247",
+			IPs:     []net.IP{{217, 138, 199, 82}, {217, 138, 199, 74}},
 		},
 		{
-			Country:     "germany",
-			City:        "frankfurt",
-			ISP:         "31173",
-			IPs:         []net.IP{{185, 213, 155, 132}, {185, 213, 155, 140}, {185, 213, 155, 136}, {185, 213, 155, 133}, {185, 213, 155, 144}, {185, 213, 155, 143}, {185, 213, 155, 138}, {185, 213, 155, 142}, {185, 213, 155, 139}, {185, 213, 155, 135}, {185, 213, 155, 145}, {185, 213, 155, 137}, {185, 213, 155, 131}, {185, 213, 155, 134}, {185, 213, 155, 141}},
-			Owned:       true,
-			DefaultPort: 1197,
+			Country: "germany",
+			City:    "frankfurt",
+			ISP:     "31173",
+			IPs:     []net.IP{{185, 213, 155, 132}, {185, 213, 155, 140}, {185, 213, 155, 136}, {185, 213, 155, 133}, {185, 213, 155, 144}, {185, 213, 155, 143}, {185, 213, 155, 138}, {185, 213, 155, 142}, {185, 213, 155, 139}, {185, 213, 155, 135}, {185, 213, 155, 145}, {185, 213, 155, 137}, {185, 213, 155, 131}, {185, 213, 155, 134}, {185, 213, 155, 141}},
+			Owned:   true,
 		},
 		{
-			Country:     "germany",
-			City:        "frankfurt",
-			ISP:         "m247",
-			IPs:         []net.IP{{82, 102, 16, 90}, {185, 104, 184, 186}, {77, 243, 183, 202}},
-			DefaultPort: 1197,
+			Country: "germany",
+			City:    "frankfurt",
+			ISP:     "m247",
+			IPs:     []net.IP{{82, 102, 16, 90}, {185, 104, 184, 186}, {77, 243, 183, 202}},
 		},
 		{
-			Country:     "denmark",
-			City:        "copenhagen",
-			ISP:         "31173",
-			IPs:         []net.IP{{141, 98, 254, 71}, {141, 98, 254, 72}},
-			Owned:       true,
-			DefaultPort: 1195,
+			Country: "denmark",
+			City:    "copenhagen",
+			ISP:     "31173",
+			IPs:     []net.IP{{141, 98, 254, 71}, {141, 98, 254, 72}},
+			Owned:   true,
 		},
 		{
-			Country:     "denmark",
-			City:        "copenhagen",
-			ISP:         "m247",
-			IPs:         []net.IP{{185, 206, 224, 114}, {185, 206, 224, 119}},
-			DefaultPort: 1195,
+			Country: "denmark",
+			City:    "copenhagen",
+			ISP:     "m247",
+			IPs:     []net.IP{{185, 206, 224, 114}, {185, 206, 224, 119}},
 		},
 		{
-			Country:     "denmark",
-			City:        "copenhagen",
-			ISP:         "blix",
-			IPs:         []net.IP{{134, 90, 149, 138}},
-			DefaultPort: 1195,
+			Country: "denmark",
+			City:    "copenhagen",
+			ISP:     "blix",
+			IPs:     []net.IP{{134, 90, 149, 138}},
 		},
 		{
-			Country:     "denmark",
-			City:        "copenhagen",
-			ISP:         "asergo",
-			IPs:         []net.IP{{82, 103, 140, 213}},
-			DefaultPort: 1195,
+			Country: "denmark",
+			City:    "copenhagen",
+			ISP:     "asergo",
+			IPs:     []net.IP{{82, 103, 140, 213}},
 		},
 		{
-			Country:     "spain",
-			City:        "madrid",
-			ISP:         "m247",
-			IPs:         []net.IP{{195, 206, 107, 146}, {45, 152, 183, 42}, {89, 238, 178, 74}, {45, 152, 183, 26}, {89, 238, 178, 34}},
-			DefaultPort: 1195,
+			Country: "spain",
+			City:    "madrid",
+			ISP:     "m247",
+			IPs:     []net.IP{{195, 206, 107, 146}, {45, 152, 183, 42}, {89, 238, 178, 74}, {45, 152, 183, 26}, {89, 238, 178, 34}},
 		},
 		{
-			Country:     "finland",
-			City:        "helsinki",
-			ISP:         "creanova",
-			IPs:         []net.IP{{185, 204, 1, 174}, {185, 204, 1, 176}, {185, 212, 149, 201}, {185, 204, 1, 175}, {185, 204, 1, 173}, {185, 204, 1, 172}, {185, 204, 1, 171}},
-			Owned:       true,
-			DefaultPort: 1196,
+			Country: "finland",
+			City:    "helsinki",
+			ISP:     "creanova",
+			IPs:     []net.IP{{185, 204, 1, 174}, {185, 204, 1, 176}, {185, 212, 149, 201}, {185, 204, 1, 175}, {185, 204, 1, 173}, {185, 204, 1, 172}, {185, 204, 1, 171}},
+			Owned:   true,
 		},
 		{
-			Country:     "france",
-			City:        "paris",
-			ISP:         "31173",
-			IPs:         []net.IP{{193, 32, 126, 83}, {193, 32, 126, 82}, {193, 32, 126, 81}, {193, 32, 126, 84}},
-			Owned:       true,
-			DefaultPort: 1301,
+			Country: "france",
+			City:    "paris",
+			ISP:     "31173",
+			IPs:     []net.IP{{193, 32, 126, 83}, {193, 32, 126, 82}, {193, 32, 126, 81}, {193, 32, 126, 84}},
+			Owned:   true,
 		},
 		{
-			Country:     "france",
-			City:        "paris",
-			ISP:         "m247",
-			IPs:         []net.IP{{185, 189, 113, 82}, {185, 156, 173, 218}, {185, 128, 25, 162}},
-			DefaultPort: 1301,
+			Country: "france",
+			City:    "paris",
+			ISP:     "m247",
+			IPs:     []net.IP{{185, 189, 113, 82}, {185, 156, 173, 218}, {185, 128, 25, 162}},
 		},
 		{
-			Country:     "uk",
-			City:        "london",
-			ISP:         "31173",
-			IPs:         []net.IP{{141, 98, 252, 133}, {141, 98, 252, 139}, {141, 98, 252, 137}, {141, 98, 252, 143}, {141, 98, 252, 142}, {141, 98, 252, 132}, {141, 98, 252, 134}, {141, 98, 252, 140}, {141, 98, 252, 141}, {141, 98, 252, 136}, {141, 98, 252, 144}, {141, 98, 252, 131}, {141, 98, 252, 135}, {141, 98, 252, 138}},
-			Owned:       true,
-			DefaultPort: 1196,
+			Country: "uk",
+			City:    "london",
+			ISP:     "31173",
+			IPs:     []net.IP{{141, 98, 252, 133}, {141, 98, 252, 139}, {141, 98, 252, 137}, {141, 98, 252, 143}, {141, 98, 252, 142}, {141, 98, 252, 132}, {141, 98, 252, 134}, {141, 98, 252, 140}, {141, 98, 252, 141}, {141, 98, 252, 136}, {141, 98, 252, 144}, {141, 98, 252, 131}, {141, 98, 252, 135}, {141, 98, 252, 138}},
+			Owned:   true,
 		},
 		{
-			Country:     "uk",
-			City:        "london",
-			ISP:         "m247",
-			IPs:         []net.IP{{185, 200, 118, 105}, {185, 212, 168, 244}},
-			DefaultPort: 1196,
+			Country: "uk",
+			City:    "london",
+			ISP:     "m247",
+			IPs:     []net.IP{{185, 200, 118, 105}, {185, 212, 168, 244}},
 		},
 		{
-			Country:     "uk",
-			City:        "manchester",
-			ISP:         "m247",
-			IPs:         []net.IP{{89, 238, 130, 66}, {81, 92, 205, 10}, {89, 238, 130, 74}, {81, 92, 205, 18}, {81, 92, 205, 26}, {89, 238, 183, 244}, {89, 238, 132, 36}, {217, 151, 98, 68}, {37, 120, 159, 164}, {89, 238, 183, 60}},
-			DefaultPort: 1196,
+			Country: "uk",
+			City:    "manchester",
+			ISP:     "m247",
+			IPs:     []net.IP{{89, 238, 130, 66}, {81, 92, 205, 10}, {89, 238, 130, 74}, {81, 92, 205, 18}, {81, 92, 205, 26}, {89, 238, 183, 244}, {89, 238, 132, 36}, {217, 151, 98, 68}, {37, 120, 159, 164}, {89, 238, 183, 60}},
 		},
 		{
-			Country:     "greece",
-			City:        "athens",
-			ISP:         "aweb",
-			IPs:         []net.IP{{185, 226, 67, 168}},
-			DefaultPort: 1302,
+			Country: "greece",
+			City:    "athens",
+			ISP:     "aweb",
+			IPs:     []net.IP{{185, 226, 67, 168}},
 		},
 		{
-			Country:     "hong kong",
-			City:        "hong kong",
-			ISP:         "leaseweb",
-			IPs:         []net.IP{{209, 58, 185, 53}, {209, 58, 184, 146}},
-			DefaultPort: 1194,
+			Country: "hong kong",
+			City:    "hong kong",
+			ISP:     "leaseweb",
+			IPs:     []net.IP{{209, 58, 185, 53}, {209, 58, 184, 146}},
 		},
 		{
-			Country:     "hungary",
-			City:        "budapest",
-			ISP:         "m247",
-			IPs:         []net.IP{{185, 94, 190, 138}, {185, 189, 114, 10}},
-			DefaultPort: 1300,
+			Country: "hungary",
+			City:    "budapest",
+			ISP:     "m247",
+			IPs:     []net.IP{{185, 94, 190, 138}, {185, 189, 114, 10}},
 		},
 		{
-			Country:     "ireland",
-			City:        "dublin",
-			ISP:         "m247",
-			IPs:         []net.IP{{217, 138, 222, 90}, {217, 138, 222, 82}},
-			DefaultPort: 1197,
+			Country: "ireland",
+			City:    "dublin",
+			ISP:     "m247",
+			IPs:     []net.IP{{217, 138, 222, 90}, {217, 138, 222, 82}},
 		},
 		{
-			Country:     "israel",
-			City:        "tel aviv",
-			ISP:         "hqserv",
-			IPs:         []net.IP{{185, 191, 207, 210}},
-			DefaultPort: 1301,
+			Country: "israel",
+			City:    "tel aviv",
+			ISP:     "hqserv",
+			IPs:     []net.IP{{185, 191, 207, 210}},
 		},
 		{
-			Country:     "italy",
-			City:        "milan",
-			ISP:         "m247",
-			IPs:         []net.IP{{217, 138, 197, 106}, {217, 64, 113, 180}, {217, 138, 197, 98}, {217, 138, 197, 114}, {217, 64, 113, 183}},
-			DefaultPort: 1300,
+			Country: "italy",
+			City:    "milan",
+			ISP:     "m247",
+			IPs:     []net.IP{{217, 138, 197, 106}, {217, 64, 113, 180}, {217, 138, 197, 98}, {217, 138, 197, 114}, {217, 64, 113, 183}},
 		},
 		{
-			Country:     "japan",
-			City:        "tokyo",
-			ISP:         "m247",
-			IPs:         []net.IP{{37, 120, 210, 138}, {193, 148, 16, 218}, {37, 120, 210, 146}, {185, 242, 4, 50}, {37, 120, 210, 122}},
-			DefaultPort: 1300,
+			Country: "japan",
+			City:    "tokyo",
+			ISP:     "m247",
+			IPs:     []net.IP{{37, 120, 210, 138}, {193, 148, 16, 218}, {37, 120, 210, 146}, {185, 242, 4, 50}, {37, 120, 210, 122}},
 		},
 		{
-			Country:     "luxembourg",
-			City:        "luxembourg",
-			ISP:         "evoluso",
-			IPs:         []net.IP{{92, 223, 89, 160}, {92, 223, 89, 182}},
-			DefaultPort: 1301,
+			Country: "luxembourg",
+			City:    "luxembourg",
+			ISP:     "evoluso",
+			IPs:     []net.IP{{92, 223, 89, 160}, {92, 223, 89, 182}},
 		},
 		{
-			Country:     "latvia",
-			City:        "riga",
-			ISP:         "makonix",
-			IPs:         []net.IP{{31, 170, 22, 2}},
-			DefaultPort: 1300,
+			Country: "latvia",
+			City:    "riga",
+			ISP:     "makonix",
+			IPs:     []net.IP{{31, 170, 22, 2}},
 		},
 		{
-			Country:     "moldova",
-			City:        "chisinau",
-			ISP:         "trabia",
-			IPs:         []net.IP{{178, 175, 142, 194}},
-			DefaultPort: 1197,
+			Country: "moldova",
+			City:    "chisinau",
+			ISP:     "trabia",
+			IPs:     []net.IP{{178, 175, 142, 194}},
 		},
 		{
-			Country:     "netherlands",
-			City:        "amsterdam",
-			ISP:         "31173",
-			IPs:         []net.IP{{185, 65, 134, 139}, {185, 65, 134, 133}, {185, 65, 134, 148}, {185, 65, 134, 147}, {185, 65, 134, 141}, {185, 65, 134, 140}, {185, 65, 134, 145}, {185, 65, 134, 132}, {185, 65, 134, 146}, {185, 65, 134, 143}, {185, 65, 134, 134}, {185, 65, 134, 136}, {185, 65, 134, 135}, {185, 65, 134, 142}, {185, 65, 134, 144}},
-			Owned:       true,
-			DefaultPort: 1194,
+			Country: "netherlands",
+			City:    "amsterdam",
+			ISP:     "31173",
+			IPs:     []net.IP{{185, 65, 134, 139}, {185, 65, 134, 133}, {185, 65, 134, 148}, {185, 65, 134, 147}, {185, 65, 134, 141}, {185, 65, 134, 140}, {185, 65, 134, 145}, {185, 65, 134, 132}, {185, 65, 134, 146}, {185, 65, 134, 143}, {185, 65, 134, 134}, {185, 65, 134, 136}, {185, 65, 134, 135}, {185, 65, 134, 142}, {185, 65, 134, 144}},
+			Owned:   true,
 		},
 		{
-			Country:     "norway",
-			City:        "oslo",
-			ISP:         "blix",
-			IPs:         []net.IP{{91, 90, 44, 13}, {91, 90, 44, 18}, {91, 90, 44, 12}, {91, 90, 44, 15}, {91, 90, 44, 16}, {91, 90, 44, 17}, {91, 90, 44, 14}, {91, 90, 44, 11}},
-			Owned:       true,
-			DefaultPort: 1302,
+			Country: "norway",
+			City:    "oslo",
+			ISP:     "blix",
+			IPs:     []net.IP{{91, 90, 44, 13}, {91, 90, 44, 18}, {91, 90, 44, 12}, {91, 90, 44, 15}, {91, 90, 44, 16}, {91, 90, 44, 17}, {91, 90, 44, 14}, {91, 90, 44, 11}},
+			Owned:   true,
 		},
 		{
-			Country:     "new zealand",
-			City:        "auckland",
-			ISP:         "intergrid",
-			IPs:         []net.IP{{103, 231, 91, 114}},
-			DefaultPort: 1195,
+			Country: "new zealand",
+			City:    "auckland",
+			ISP:     "intergrid",
+			IPs:     []net.IP{{103, 231, 91, 114}},
 		},
 		{
-			Country:     "poland",
-			City:        "warsaw",
-			ISP:         "m247",
-			IPs:         []net.IP{{37, 120, 211, 202}, {37, 120, 156, 162}, {185, 244, 214, 210}, {37, 120, 211, 186}, {185, 244, 214, 215}, {37, 120, 211, 194}},
-			DefaultPort: 1194,
+			Country: "poland",
+			City:    "warsaw",
+			ISP:     "m247",
+			IPs:     []net.IP{{37, 120, 211, 202}, {37, 120, 156, 162}, {185, 244, 214, 210}, {37, 120, 211, 186}, {185, 244, 214, 215}, {37, 120, 211, 194}},
 		},
 		{
-			Country:     "portugal",
-			City:        "lisbon",
-			ISP:         "dotsi",
-			IPs:         []net.IP{{5, 206, 231, 214}},
-			DefaultPort: 1194,
+			Country: "portugal",
+			City:    "lisbon",
+			ISP:     "dotsi",
+			IPs:     []net.IP{{5, 206, 231, 214}},
 		},
 		{
-			Country:     "romania",
-			City:        "bucharest",
-			ISP:         "m247",
-			IPs:         []net.IP{{89, 40, 181, 146}, {185, 181, 100, 202}, {89, 40, 181, 82}, {185, 45, 13, 10}, {89, 40, 181, 210}},
-			DefaultPort: 1301,
+			Country: "romania",
+			City:    "bucharest",
+			ISP:     "m247",
+			IPs:     []net.IP{{89, 40, 181, 146}, {185, 181, 100, 202}, {89, 40, 181, 82}, {185, 45, 13, 10}, {89, 40, 181, 210}},
 		},
 		{
-			Country:     "serbia",
-			City:        "belgrade",
-			ISP:         "m247",
-			IPs:         []net.IP{{141, 98, 103, 50}},
-			DefaultPort: 1301,
+			Country: "serbia",
+			City:    "belgrade",
+			ISP:     "m247",
+			IPs:     []net.IP{{141, 98, 103, 50}},
 		},
 		{
-			Country:     "serbia",
-			City:        "nis",
-			ISP:         "ninet",
-			IPs:         []net.IP{{176, 104, 107, 118}},
-			DefaultPort: 1301,
+			Country: "serbia",
+			City:    "nis",
+			ISP:     "ninet",
+			IPs:     []net.IP{{176, 104, 107, 118}},
 		},
 		{
-			Country:     "sweden",
-			City:        "gothenburg",
-			ISP:         "31173",
-			IPs:         []net.IP{{185, 213, 154, 139}, {185, 213, 154, 141}, {185, 213, 154, 140}, {185, 213, 154, 132}, {185, 213, 154, 135}, {185, 213, 154, 138}, {185, 213, 154, 133}, {185, 213, 154, 131}, {185, 213, 154, 134}, {185, 213, 154, 142}, {185, 213, 154, 137}},
-			Owned:       true,
-			DefaultPort: 1302,
+			Country: "sweden",
+			City:    "gothenburg",
+			ISP:     "31173",
+			IPs:     []net.IP{{185, 213, 154, 139}, {185, 213, 154, 141}, {185, 213, 154, 140}, {185, 213, 154, 132}, {185, 213, 154, 135}, {185, 213, 154, 138}, {185, 213, 154, 133}, {185, 213, 154, 131}, {185, 213, 154, 134}, {185, 213, 154, 142}, {185, 213, 154, 137}},
+			Owned:   true,
 		},
 		{
-			Country:     "sweden",
-			City:        "helsingborg",
-			ISP:         "31173",
-			IPs:         []net.IP{{185, 213, 152, 133}, {185, 213, 152, 132}, {185, 213, 152, 138}, {185, 213, 152, 131}, {185, 213, 152, 137}},
-			Owned:       true,
-			DefaultPort: 1302,
+			Country: "sweden",
+			City:    "helsingborg",
+			ISP:     "31173",
+			IPs:     []net.IP{{185, 213, 152, 133}, {185, 213, 152, 132}, {185, 213, 152, 138}, {185, 213, 152, 131}, {185, 213, 152, 137}},
+			Owned:   true,
 		},
 		{
-			Country:     "sweden",
-			City:        "malmo",
-			ISP:         "31173",
-			IPs:         []net.IP{{193, 138, 218, 138}, {45, 83, 220, 87}, {141, 98, 255, 94}, {141, 98, 255, 85}, {141, 98, 255, 87}, {141, 98, 255, 92}, {45, 83, 220, 84}, {141, 98, 255, 86}, {45, 83, 220, 81}, {193, 138, 218, 135}, {193, 138, 218, 131}, {193, 138, 218, 136}, {141, 98, 255, 88}, {141, 98, 255, 91}, {193, 138, 218, 133}, {45, 83, 220, 89}, {45, 83, 220, 88}, {141, 98, 255, 84}, {141, 98, 255, 89}, {193, 138, 218, 134}, {45, 83, 220, 86}, {141, 98, 255, 83}, {45, 83, 220, 85}, {141, 98, 255, 90}, {141, 98, 255, 93}, {193, 138, 218, 132}, {193, 138, 218, 137}, {45, 83, 220, 91}},
-			Owned:       true,
-			DefaultPort: 1302,
+			Country: "sweden",
+			City:    "malmo",
+			ISP:     "31173",
+			IPs:     []net.IP{{193, 138, 218, 138}, {45, 83, 220, 87}, {141, 98, 255, 94}, {141, 98, 255, 85}, {141, 98, 255, 87}, {141, 98, 255, 92}, {45, 83, 220, 84}, {141, 98, 255, 86}, {45, 83, 220, 81}, {193, 138, 218, 135}, {193, 138, 218, 131}, {193, 138, 218, 136}, {141, 98, 255, 88}, {141, 98, 255, 91}, {193, 138, 218, 133}, {45, 83, 220, 89}, {45, 83, 220, 88}, {141, 98, 255, 84}, {141, 98, 255, 89}, {193, 138, 218, 134}, {45, 83, 220, 86}, {141, 98, 255, 83}, {45, 83, 220, 85}, {141, 98, 255, 90}, {141, 98, 255, 93}, {193, 138, 218, 132}, {193, 138, 218, 137}, {45, 83, 220, 91}},
+			Owned:   true,
 		},
 		{
-			Country:     "sweden",
-			City:        "stockholm",
-			ISP:         "31173",
-			IPs:         []net.IP{{185, 65, 135, 150}, {185, 65, 135, 153}, {185, 65, 135, 151}, {185, 65, 135, 149}, {185, 65, 135, 141}, {185, 65, 135, 144}, {185, 65, 135, 145}, {185, 65, 135, 140}, {185, 65, 135, 134}, {185, 65, 135, 139}, {185, 65, 135, 131}, {185, 65, 135, 152}, {185, 65, 135, 146}, {185, 65, 135, 138}, {185, 65, 135, 143}, {185, 65, 135, 135}, {185, 65, 135, 154}, {185, 65, 135, 136}, {185, 65, 135, 133}, {185, 65, 135, 132}},
-			Owned:       true,
-			DefaultPort: 1302,
+			Country: "sweden",
+			City:    "stockholm",
+			ISP:     "31173",
+			IPs:     []net.IP{{185, 65, 135, 150}, {185, 65, 135, 153}, {185, 65, 135, 151}, {185, 65, 135, 149}, {185, 65, 135, 141}, {185, 65, 135, 144}, {185, 65, 135, 145}, {185, 65, 135, 140}, {185, 65, 135, 134}, {185, 65, 135, 139}, {185, 65, 135, 131}, {185, 65, 135, 152}, {185, 65, 135, 146}, {185, 65, 135, 138}, {185, 65, 135, 143}, {185, 65, 135, 135}, {185, 65, 135, 154}, {185, 65, 135, 136}, {185, 65, 135, 133}, {185, 65, 135, 132}},
+			Owned:   true,
 		},
 		{
-			Country:     "singapore",
-			City:        "singapore",
-			ISP:         "m247",
-			IPs:         []net.IP{{37, 120, 208, 218}, {37, 120, 208, 234}, {37, 120, 208, 226}, {185, 128, 24, 50}},
-			DefaultPort: 1196,
+			Country: "singapore",
+			City:    "singapore",
+			ISP:     "m247",
+			IPs:     []net.IP{{37, 120, 208, 218}, {37, 120, 208, 234}, {37, 120, 208, 226}, {185, 128, 24, 50}},
 		},
 		{
-			Country:     "singapore",
-			City:        "singapore",
-			ISP:         "leaseweb",
-			IPs:         []net.IP{{103, 254, 153, 82}},
-			DefaultPort: 1196,
+			Country: "singapore",
+			City:    "singapore",
+			ISP:     "leaseweb",
+			IPs:     []net.IP{{103, 254, 153, 82}},
 		},
 		{
-			Country:     "usa",
-			City:        "atlanta",
-			ISP:         "100tb",
-			IPs:         []net.IP{{208, 84, 153, 142}, {107, 152, 108, 62}},
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "atlanta",
+			ISP:     "100tb",
+			IPs:     []net.IP{{208, 84, 153, 142}, {107, 152, 108, 62}},
 		},
 		{
-			Country:     "usa",
-			City:        "atlanta",
-			ISP:         "quadranet",
-			IPs:         []net.IP{{104, 129, 24, 242}},
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "atlanta",
+			ISP:     "quadranet",
+			IPs:     []net.IP{{104, 129, 24, 242}},
 		},
 		{
-			Country:     "usa",
-			City:        "atlanta",
-			ISP:         "micfo",
-			IPs:         []net.IP{{155, 254, 96, 2}, {155, 254, 96, 18}, {155, 254, 96, 34}}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "atlanta",
+			ISP:     "micfo",
+			IPs:     []net.IP{{155, 254, 96, 2}, {155, 254, 96, 18}, {155, 254, 96, 34}}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "chicago",
-			ISP:         "tzulo",
-			IPs:         []net.IP{{68, 235, 43, 18}, {68, 235, 43, 26}, {68, 235, 43, 42}, {68, 235, 43, 50}, {68, 235, 43, 58}, {68, 235, 43, 66}, {68, 235, 43, 74}}, // 3 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "chicago",
+			ISP:     "tzulo",
+			IPs:     []net.IP{{68, 235, 43, 18}, {68, 235, 43, 26}, {68, 235, 43, 42}, {68, 235, 43, 50}, {68, 235, 43, 58}, {68, 235, 43, 66}, {68, 235, 43, 74}}, // 3 missing
 		},
 		{
-			Country:     "usa",
-			City:        "chicago",
-			ISP:         "quadranet",
-			IPs:         []net.IP{}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "chicago",
+			ISP:     "quadranet",
+			IPs:     []net.IP{}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "dallas",
-			ISP:         "quadranet",
-			IPs:         []net.IP{{96, 44, 145, 18}},
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "dallas",
+			ISP:     "quadranet",
+			IPs:     []net.IP{{96, 44, 145, 18}},
 		},
 		{
-			Country:     "usa",
-			City:        "dallas",
-			ISP:         "100tb",
-			IPs:         []net.IP{{104, 200, 142, 50}, {107, 152, 102, 106}},
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "dallas",
+			ISP:     "100tb",
+			IPs:     []net.IP{{104, 200, 142, 50}, {107, 152, 102, 106}},
 		},
 		{
-			Country:     "usa",
-			City:        "denver",
-			ISP:         "tzulo",
-			IPs:         []net.IP{{198, 54, 128, 74}}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "denver",
+			ISP:     "tzulo",
+			IPs:     []net.IP{{198, 54, 128, 74}}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "los angeles",
-			ISP:         "m247",
-			IPs:         []net.IP{{45, 152, 182, 66}, {45, 152, 182, 74}, {45, 83, 89, 162}, {185, 230, 126, 146}}, // 7 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "los angeles",
+			ISP:     "m247",
+			IPs:     []net.IP{{45, 152, 182, 66}, {45, 152, 182, 74}, {45, 83, 89, 162}, {185, 230, 126, 146}}, // 7 missing
 		},
 		{
-			Country:     "usa",
-			City:        "los angeles",
-			ISP:         "tzulo",
-			IPs:         []net.IP{{198, 54, 129, 74}}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "los angeles",
+			ISP:     "tzulo",
+			IPs:     []net.IP{{198, 54, 129, 74}}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "los angeles",
-			ISP:         "100tb",
-			IPs:         []net.IP{{104, 200, 152, 66}, {107, 181, 168, 130}},
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "los angeles",
+			ISP:     "100tb",
+			IPs:     []net.IP{{104, 200, 152, 66}, {107, 181, 168, 130}},
 		},
 		{
-			Country:     "usa",
-			City:        "los angeles",
-			ISP:         "choopa",
-			IPs:         []net.IP{{104, 238, 143, 58}}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "los angeles",
+			ISP:     "choopa",
+			IPs:     []net.IP{{104, 238, 143, 58}}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "miami",
-			ISP:         "m247",
-			IPs:         []net.IP{{37, 120, 215, 130}, {193, 37, 252, 138}, {193, 37, 252, 154}, {37, 120, 215, 138}}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "miami",
+			ISP:     "m247",
+			IPs:     []net.IP{{37, 120, 215, 130}, {193, 37, 252, 138}, {193, 37, 252, 154}, {37, 120, 215, 138}}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "miami",
-			ISP:         "100tb",
-			IPs:         []net.IP{{172, 98, 76, 114}},
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "miami",
+			ISP:     "100tb",
+			IPs:     []net.IP{{172, 98, 76, 114}},
 		},
 		{
-			Country:     "usa",
-			City:        "miami",
-			ISP:         "micfo",
-			IPs:         []net.IP{}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "miami",
+			ISP:     "micfo",
+			IPs:     []net.IP{}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "new york",
-			ISP:         "m247",
-			IPs:         []net.IP{{185, 232, 22, 66}, {185, 232, 22, 98}, {193, 148, 18, 250}, {185, 232, 22, 10}, {217, 138, 206, 10}, {193, 148, 18, 218}, {193, 148, 18, 226}, {193, 148, 18, 194}, {87, 101, 95, 98}, {87, 101, 95, 114}, {87, 101, 95, 122}, {212, 103, 48, 226}, {176, 113, 72, 226}, {217, 138, 198, 250}, {217, 138, 206, 58}}, // 5 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "new york",
+			ISP:     "m247",
+			IPs:     []net.IP{{185, 232, 22, 66}, {185, 232, 22, 98}, {193, 148, 18, 250}, {185, 232, 22, 10}, {217, 138, 206, 10}, {193, 148, 18, 218}, {193, 148, 18, 226}, {193, 148, 18, 194}, {87, 101, 95, 98}, {87, 101, 95, 114}, {87, 101, 95, 122}, {212, 103, 48, 226}, {176, 113, 72, 226}, {217, 138, 198, 250}, {217, 138, 206, 58}}, // 5 missing
 		},
 		{
-			Country:     "usa",
-			City:        "new york",
-			ISP:         "100tb",
-			IPs:         []net.IP{{107, 182, 226, 206}, {107, 182, 226, 218}},
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "new york",
+			ISP:     "100tb",
+			IPs:     []net.IP{{107, 182, 226, 206}, {107, 182, 226, 218}},
 		},
 		{
-			Country:     "usa",
-			City:        "phoenix",
-			ISP:         "100tb",
-			IPs:         []net.IP{}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "phoenix",
+			ISP:     "100tb",
+			IPs:     []net.IP{}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "phoenix",
-			ISP:         "micfo",
-			IPs:         []net.IP{{192, 200, 24, 82}}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "phoenix",
+			ISP:     "micfo",
+			IPs:     []net.IP{{192, 200, 24, 82}}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "piscataway",
-			ISP:         "choopa",
-			IPs:         []net.IP{{108, 61, 78, 138}, {108, 61, 48, 115}, {66, 55, 147, 59}},
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "piscataway",
+			ISP:     "choopa",
+			IPs:     []net.IP{{108, 61, 78, 138}, {108, 61, 48, 115}, {66, 55, 147, 59}},
 		},
 		{
-			Country:     "usa",
-			City:        "seattle",
-			ISP:         "100tb",
-			IPs:         []net.IP{{104, 200, 129, 202}, {104, 200, 129, 150}, {104, 200, 129, 110}}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "seattle",
+			ISP:     "100tb",
+			IPs:     []net.IP{{104, 200, 129, 202}, {104, 200, 129, 150}, {104, 200, 129, 110}}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "seattle",
-			ISP:         "micfo",
-			IPs:         []net.IP{{104, 128, 136, 146}},
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "seattle",
+			ISP:     "micfo",
+			IPs:     []net.IP{{104, 128, 136, 146}},
 		},
 		{
-			Country:     "usa",
-			City:        "san francisco",
-			ISP:         "micfo",
-			IPs:         []net.IP{{209, 209, 238, 34}}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "san francisco",
+			ISP:     "micfo",
+			IPs:     []net.IP{{209, 209, 238, 34}}, // 1 missing
 		},
 		{
-			Country:     "usa",
-			City:        "salt lake city",
-			ISP:         "100tb",
-			IPs:         []net.IP{{107, 182, 238, 229}, {107, 182, 235, 233}, {67, 212, 238, 236}, {67, 212, 238, 237}, {67, 212, 238, 239}, {107, 182, 239, 185}, {107, 182, 239, 170}}, // 2 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "salt lake city",
+			ISP:     "100tb",
+			IPs:     []net.IP{{107, 182, 238, 229}, {107, 182, 235, 233}, {67, 212, 238, 236}, {67, 212, 238, 237}, {67, 212, 238, 239}, {107, 182, 239, 185}, {107, 182, 239, 170}}, // 2 missing
 		},
 		{
-			Country:     "usa",
-			City:        "secaucus",
-			ISP:         "quadranet",
-			IPs:         []net.IP{{23, 226, 131, 154}}, // 1 missing
-			DefaultPort: 1194,
+			Country: "usa",
+			City:    "secaucus",
+			ISP:     "quadranet",
+			IPs:     []net.IP{{23, 226, 131, 154}}, // 1 missing
 		},
 	}
 }
diff --git a/internal/models/servers.go b/internal/models/servers.go
index 02e6c1e03..cc5467df4 100644
--- a/internal/models/servers.go
+++ b/internal/models/servers.go
@@ -8,12 +8,11 @@ type PIAServer struct {
 }
 
 type MullvadServer struct {
-	IPs         []net.IP
-	Country     string
-	City        string
-	ISP         string
-	Owned       bool
-	DefaultPort uint16
+	IPs     []net.IP
+	Country string
+	City    string
+	ISP     string
+	Owned   bool
 }
 
 type WindscribeServer struct {
diff --git a/internal/provider/mullvad.go b/internal/provider/mullvad.go
index 7c454e4d5..9cb2af1fd 100644
--- a/internal/provider/mullvad.go
+++ b/internal/provider/mullvad.go
@@ -42,8 +42,13 @@ func (m *mullvad) GetOpenVPNConnections(selection models.ServerSelection) (conne
 		return nil, fmt.Errorf("no server found for country %q, city %q and ISP %q", selection.Country, selection.City, selection.ISP)
 	}
 
+	var defaultPort uint16 = 1194
+	if selection.Protocol == constants.TCP {
+		defaultPort = 443
+	}
+
 	for _, server := range servers {
-		port := server.DefaultPort
+		port := defaultPort
 		if selection.CustomPort > 0 {
 			port = selection.CustomPort
 		}
diff --git a/internal/settings/providers.go b/internal/settings/providers.go
index 51a65304b..a8df31d84 100644
--- a/internal/settings/providers.go
+++ b/internal/settings/providers.go
@@ -1,6 +1,8 @@
 package settings
 
 import (
+	"fmt"
+
 	"github.com/qdm12/gluetun/internal/constants"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/params"
@@ -67,6 +69,19 @@ func GetMullvadSettings(paramsReader params.Reader) (settings models.ProviderSet
 	if err != nil {
 		return settings, err
 	}
+	if settings.ServerSelection.Protocol == constants.TCP {
+		switch settings.ServerSelection.CustomPort {
+		case 0, 80, 443, 1401:
+		default:
+			return settings, fmt.Errorf("port %d is not valid for TCP protocol", settings.ServerSelection.CustomPort)
+		}
+	} else {
+		switch settings.ServerSelection.CustomPort {
+		case 0, 53, 1194, 1195, 1196, 1197, 1300, 1301, 1302, 1303, 1400:
+		default:
+			return settings, fmt.Errorf("port %d is not valid for UDP protocol", settings.ServerSelection.CustomPort)
+		}
+	}
 	return settings, nil
 }