diff --git a/plinth/modules/networks/forms.py b/plinth/modules/networks/forms.py
index 10101e717..5629c533b 100644
--- a/plinth/modules/networks/forms.py
+++ b/plinth/modules/networks/forms.py
@@ -59,6 +59,8 @@ available over this interfaces. Select Internal only for trusted networks.'),
         choices=[('external', 'External'), ('internal', 'Internal')])
     ipv4_method = forms.ChoiceField(
         label=_('IPv4 Addressing Method'),
+        help_text='"Shared" will start a DHCP Server, "Automatic" will \
+        start a DHCP client.',
         choices=[('auto', 'Automatic (DHCP)'),
                  ('shared', 'Shared'),
                  ('manual', 'Manual')])
@@ -66,6 +68,31 @@ available over this interfaces. Select Internal only for trusted networks.'),
         label=_('Address'),
         validators=[validators.validate_ipv4_address],
         required=False)
+    ipv4_netmask = forms.CharField(
+        label=_('Netmask'),
+        help_text='Optional value. If not given the default netmask \
+        (associated with the address) will be used',
+        validators=[validators.validate_ipv4_address],
+        required=False)
+    ipv4_gateway = forms.CharField(
+        label=_('Gateway'),
+        help_text='Optional value.',
+        validators=[validators.validate_ipv4_address],
+        required=False)
+    ipv4_dns = forms.CharField(
+        label=_('DNS Server'),
+        help_text='Optional value. If this value is given and IPv4 \
+        Addressing Method is DHCP, the DNS Servers from DHCP Server \
+        will be ignored.',
+        validators=[validators.validate_ipv4_address],
+        required=False)
+    ipv4_second_dns = forms.CharField(
+        label=_('Second DNS Server'),
+        help_text='Optional value. If this value is given and IPv4 \
+        Addressing Method is DHCP, the DNS Servers from DHCP Server \
+        will be ignored.',
+        validators=[validators.validate_ipv4_address],
+        required=False)
 
     def __init__(self, *args, **kwargs):
         """Initialize the form, populate interface choices."""
@@ -143,6 +170,27 @@ Point.'))
         label=_('Address'),
         validators=[validators.validate_ipv4_address],
         required=False)
+    ipv4_netmask = forms.CharField(
+        label=_('Netmask'),
+        help_text='Optional value. If not given the default netmask \
+        (associated with the address) will be used',
+        validators=[validators.validate_ipv4_address],
+        required=False)
+    ipv4_gateway = forms.CharField(
+        label=_('Gateway'),
+        help_text='Optional value.',
+        validators=[validators.validate_ipv4_address],
+        required=False)
+    ipv4_dns = forms.CharField(
+        label=_('DNS Server'),
+        help_text='Optional value.',
+        validators=[validators.validate_ipv4_address],
+        required=False)
+    ipv4_second_dns = forms.CharField(
+        label=_('Second DNS Server'),
+        help_text='Optional value.',
+        validators=[validators.validate_ipv4_address],
+        required=False)
 
     def __init__(self, *args, **kwargs):
         """Initialize the form, populate interface choices."""
diff --git a/plinth/modules/networks/networks.py b/plinth/modules/networks/networks.py
index df54438fb..3ad278083 100644
--- a/plinth/modules/networks/networks.py
+++ b/plinth/modules/networks/networks.py
@@ -140,11 +140,16 @@ def edit(request, uuid):
             else:
                 ipv4_method = form.cleaned_data['ipv4_method']
                 ipv4_address = form.cleaned_data['ipv4_address']
+                ipv4_netmask = form.cleaned_data['ipv4_netmask']
+                ipv4_gateway = form.cleaned_data['ipv4_gateway']
+                ipv4_dns = form.cleaned_data['ipv4_dns']
+                ipv4_second_dns = form.cleaned_data['ipv4_second_dns']
 
             if connection.get_connection_type() == '802-3-ethernet':
                 network.edit_ethernet_connection(
                     connection, name, interface, zone, ipv4_method,
-                    ipv4_address)
+                    ipv4_address, ipv4_netmask, ipv4_gateway,
+                    ipv4_dns, ipv4_second_dns)
             elif connection.get_connection_type() == '802-11-wireless':
                 ssid = form.cleaned_data['ssid']
                 mode = form.cleaned_data['mode']
@@ -153,7 +158,8 @@ def edit(request, uuid):
 
                 network.edit_wifi_connection(
                     connection, name, interface, zone, ssid, mode, auth_mode,
-                    passphrase, ipv4_method, ipv4_address)
+                    passphrase, ipv4_method, ipv4_address, ipv4_netmask,
+                    ipv4_gateway, ipv4_dns, ipv4_second_dns)
             elif connection.get_connection_type() == 'pppoe':
                 network.edit_pppoe_connection(
                     connection, name, interface, zone, username, password)
@@ -176,8 +182,20 @@ def edit(request, uuid):
             settings_ipv4 = connection.get_setting_ip4_config()
             form_data['ipv4_method'] = settings_ipv4.get_method()
             address = network.get_first_ip_address_from_connection(connection)
+            netmask = network.get_first_netmask_from_connection(connection)
+            gateway = settings_ipv4.get_gateway()
+            dns = settings_ipv4.get_dns(0)
+            second_dns = settings_ipv4.get_dns(1)
             if address:
                 form_data['ipv4_address'] = address
+            if netmask:
+                form_data['ipv4_netmask'] = netmask
+            if gateway:
+                form_data['ipv4_gateway'] = gateway
+            if dns:
+                form_data['ipv4_dns'] = dns
+            if second_dns:
+                form_data['ipv4_second_dns'] = second_dns
 
         if settings_connection.get_connection_type() == '802-11-wireless':
             settings_wireless = connection.get_setting_wireless()
@@ -291,9 +309,14 @@ def add_ethernet(request):
             zone = form.cleaned_data['zone']
             ipv4_method = form.cleaned_data['ipv4_method']
             ipv4_address = form.cleaned_data['ipv4_address']
+            ipv4_netmask = form.cleaned_data['ipv4_netmask']
+            ipv4_gateway = form.cleaned_data['ipv4_gateway']
+            ipv4_dns = form.cleaned_data['ipv4_dns']
+            ipv4_second_dns = form.cleaned_data['ipv4_second_dns']
 
             network.add_ethernet_connection(
-                name, interface, zone, ipv4_method, ipv4_address)
+                name, interface, zone, ipv4_method, ipv4_address, ipv4_netmask,
+                ipv4_gateway, ipv4_dns, ipv4_second_dns)
             return redirect(reverse_lazy('networks:index'))
     else:
         form = AddEthernetForm()
@@ -356,10 +379,15 @@ def add_wifi(request, ssid=None, interface_name=None):
             passphrase = form.cleaned_data['passphrase']
             ipv4_method = form.cleaned_data['ipv4_method']
             ipv4_address = form.cleaned_data['ipv4_address']
+            ipv4_netmask = form.cleaned_data['ipv4_netmask']
+            ipv4_gateway = form.cleaned_data['ipv4_gateway']
+            ipv4_dns = form.cleaned_data['ipv4_dns']
+            ipv4_second_dns = form.cleaned_data['ipv4_second_dns']
 
             network.add_wifi_connection(
                 name, interface, zone, ssid, mode, auth_mode, passphrase,
-                ipv4_method, ipv4_address)
+                ipv4_method, ipv4_address, ipv4_netmask,
+                ipv4_gateway, ipv4_dns, ipv4_second_dns)
             return redirect(reverse_lazy('networks:index'))
     else:
         if form_data:
diff --git a/plinth/modules/networks/templates/connections_create.html b/plinth/modules/networks/templates/connections_create.html
index 319374502..759fba017 100644
--- a/plinth/modules/networks/templates/connections_create.html
+++ b/plinth/modules/networks/templates/connections_create.html
@@ -45,18 +45,26 @@
 
     if ($("#id_ipv4_method").prop("value") != "manual") {
       $("#id_ipv4_address").prop("readOnly", true);
+      $("#id_ipv4_netmask").prop("readOnly", true);
+      $("#id_ipv4_gateway").prop("readOnly", true);
     }
     $("#id_name").focus();
 
     $("#id_ipv4_method").change(function() {
-      if ($("#id_ipv4_method").prop("value") == 'manual') {
-        $("#id_ipv4_address").prop("readOnly", false);
-        $("#id_ipv4_address").prop("required", true);
-      } else {
-        $("#id_ipv4_address").val("");
-        $("#id_ipv4_address").prop("readOnly", true);
-        $("#id_ipv4_address").prop("required", false);
-      }
+        if ($("#id_ipv4_method").prop("value") == "manual") {
+          $("#id_ipv4_address").prop("readOnly", false);
+          $("#id_ipv4_address").prop("required", true);
+          $("#id_ipv4_netmask").prop("readOnly", false);
+          $("#id_ipv4_gateway").prop("readOnly", false);
+        } else {
+          $("#id_ipv4_address").val("");
+          $("#id_ipv4_address").prop("readOnly", true);
+          $("#id_ipv4_address").prop("required", false);
+          $("#id_ipv4_netmask").val("");
+          $("#id_ipv4_netmask").prop("readOnly", true);
+          $("#id_ipv4_gateway").val("");
+          $("#id_ipv4_gateway").prop("readOnly", true);
+        }
     });
 
     $('#id_show_password').change(function() {
diff --git a/plinth/modules/networks/templates/connections_edit.html b/plinth/modules/networks/templates/connections_edit.html
index 141d1bd7d..88cfadc17 100644
--- a/plinth/modules/networks/templates/connections_edit.html
+++ b/plinth/modules/networks/templates/connections_edit.html
@@ -45,6 +45,8 @@
 
     if ($("#id_ipv4_method").prop("value") != "manual") {
       $("#id_ipv4_address").prop("readOnly", true);
+      $("#id_ipv4_netmask").prop("readOnly", true);
+      $("#id_ipv4_gateway").prop("readOnly", true);
     }
     $("#id_name").focus();
 
@@ -52,10 +54,16 @@
       if ($("#id_ipv4_method").prop("value") == "manual") {
         $("#id_ipv4_address").prop("readOnly", false);
         $("#id_ipv4_address").prop("required", true);
+        $("#id_ipv4_netmask").prop("readOnly", false);
+        $("#id_ipv4_gateway").prop("readOnly", false);
       } else {
         $("#id_ipv4_address").val("");
         $("#id_ipv4_address").prop("readOnly", true);
         $("#id_ipv4_address").prop("required", false);
+        $("#id_ipv4_netmask").val("");
+        $("#id_ipv4_netmask").prop("readOnly", true);
+        $("#id_ipv4_gateway").val("");
+        $("#id_ipv4_gateway").prop("readOnly", true);
       }
     });
 
diff --git a/plinth/network.py b/plinth/network.py
index 68979b10a..a046d14ad 100644
--- a/plinth/network.py
+++ b/plinth/network.py
@@ -201,6 +201,27 @@ def get_first_ip_address_from_connection(connection):
     return output.strip().split(', ')[0].split('/')[0]
 
 
+def get_first_netmask_from_connection(connection):
+    """Return the first IP address of a connection setting.
+
+    XXX: Work around a bug in NetworkManager/Python GI.  Remove after
+    the bug if fixed.
+    https://bugzilla.gnome.org/show_bug.cgi?id=756380.
+    """
+    command = ['nmcli', '--terse', '--mode', 'tabular', '--fields',
+               'ipv4.addresses', 'connection', 'show', connection.get_uuid()]
+
+    output = subprocess.check_output(command).decode()
+    if '/' not in output:
+        return None
+
+    CIDR = output.strip().split(', ')[0].split('/')[1]
+    netmask = socket.inet_ntoa(struct.pack(">I", (0xffffffff <<
+                                                  (32 - int(CIDR))) &
+                                           0xffffffff))
+    return netmask
+
+
 def get_connection_list():
     """Get a list of active and available connections."""
     active_uuids = []
@@ -291,7 +312,8 @@ def _update_common_settings(connection, connection_uuid, name, type_,
     return connection
 
 
-def _update_ipv4_settings(connection, ipv4_method, ipv4_address):
+def _update_ipv4_settings(connection, ipv4_method, ipv4_address, ipv4_netmask,
+                          ipv4_gateway, ipv4_dns, ipv4_second_dns):
     """Edit IPv4 settings for network manager connections."""
     settings = nm.SettingIP4Config.new()
     connection.add_setting(settings)
@@ -299,22 +321,45 @@ def _update_ipv4_settings(connection, ipv4_method, ipv4_address):
     settings.set_property(nm.SETTING_IP_CONFIG_METHOD, ipv4_method)
     if ipv4_method == nm.SETTING_IP4_CONFIG_METHOD_MANUAL and ipv4_address:
         ipv4_address_int = ipv4_string_to_int(ipv4_address)
-        ipv4_prefix = nm.utils_ip4_get_default_prefix(ipv4_address_int)
+        if not ipv4_netmask:
+            ipv4_netmask_int = nm.utils_ip4_get_default_prefix(
+                               ipv4_address_int)
 
-        address = nm.IPAddress.new(socket.AF_INET, ipv4_address, ipv4_prefix)
+        ipv4_netmask_int = nm.utils_ip4_netmask_to_prefix(
+                           ipv4_string_to_int(ipv4_netmask))
+        address = nm.IPAddress.new(socket.AF_INET, ipv4_address,
+                                   ipv4_netmask_int)
         settings.add_address(address)
 
-        settings.set_property(nm.SETTING_IP_CONFIG_GATEWAY, '0.0.0.0')
+        if ipv4_dns:
+            settings.add_dns(ipv4_dns)
+        if ipv4_second_dns:
+            settings.add_dns(ipv4_second_dns)
+
+        if not ipv4_gateway:
+            settings.set_property(nm.SETTING_IP_CONFIG_GATEWAY, '0.0.0.0')
+        else:
+            settings.set_property(nm.SETTING_IP_CONFIG_GATEWAY, ipv4_gateway)
+    else:
+        if ipv4_dns or ipv4_second_dns:
+            settings.set_property(nm.SETTING_IP_CONFIG_IGNORE_AUTO_DNS, True)
+
+        if ipv4_dns:
+            settings.add_dns(ipv4_dns)
+        if ipv4_second_dns:
+            settings.add_dns(ipv4_second_dns)
 
 
 def _update_ethernet_settings(connection, connection_uuid, name, interface,
-                              zone, ipv4_method, ipv4_address):
+                              zone, ipv4_method, ipv4_address, ipv4_netmask,
+                              ipv4_gateway, ipv4_dns, ipv4_second_dns):
     """Create/edit ethernet settings for network manager connections."""
     type_ = '802-3-ethernet'
 
     connection = _update_common_settings(connection, connection_uuid, name,
                                          type_, interface, zone)
-    _update_ipv4_settings(connection, ipv4_method, ipv4_address)
+    _update_ipv4_settings(connection, ipv4_method, ipv4_address, ipv4_netmask,
+                          ipv4_gateway, ipv4_dns, ipv4_second_dns)
 
     # Ethernet
     settings = connection.get_setting_wired()
@@ -377,7 +422,9 @@ def edit_pppoe_connection(connection, name, interface, zone, username,
     connection.commit_changes(True)
 
 
-def add_ethernet_connection(name, interface, zone, ipv4_method, ipv4_address):
+def add_ethernet_connection(name, interface, zone, ipv4_method, ipv4_address,
+                            ipv4_netmask, ipv4_gateway, ipv4_dns,
+                            ipv4_second_dns):
     """Add an automatic ethernet connection in network manager.
 
     Return the UUID for the connection.
@@ -385,31 +432,34 @@ def add_ethernet_connection(name, interface, zone, ipv4_method, ipv4_address):
     connection_uuid = str(uuid.uuid4())
     connection = _update_ethernet_settings(
         None, connection_uuid, name, interface, zone, ipv4_method,
-        ipv4_address)
+        ipv4_address, ipv4_netmask, ipv4_gateway, ipv4_dns, ipv4_second_dns)
     client = nm.Client.new(None)
     client.add_connection_async(connection, True, None, _callback, None)
     return connection_uuid
 
 
 def edit_ethernet_connection(connection, name, interface, zone, ipv4_method,
-                             ipv4_address):
+                             ipv4_address, ipv4_netmask, ipv4_gateway,
+                             ipv4_dns, ipv4_second_dns):
     """Edit an existing ethernet connection in network manager."""
     _update_ethernet_settings(
         connection, connection.get_uuid(), name, interface, zone, ipv4_method,
-        ipv4_address)
+        ipv4_address, ipv4_netmask, ipv4_gateway, ipv4_dns, ipv4_second_dns)
     connection.commit_changes(True)
 
 
 def _update_wifi_settings(connection, connection_uuid, name, interface, zone,
                           ssid, mode, auth_mode, passphrase, ipv4_method,
-                          ipv4_address):
+                          ipv4_address, ipv4_netmask, ipv4_gateway, ipv4_dns,
+                          ipv4_second_dns):
     """Create/edit wifi settings for network manager connections."""
     type_ = '802-11-wireless'
     key_mgmt = 'wpa-psk'
 
     connection = _update_common_settings(connection, connection_uuid, name,
                                          type_, interface, zone)
-    _update_ipv4_settings(connection, ipv4_method, ipv4_address)
+    _update_ipv4_settings(connection, ipv4_method, ipv4_address, ipv4_netmask,
+                          ipv4_gateway, ipv4_dns, ipv4_second_dns)
 
     # Wireless
     settings = connection.get_setting_wireless()
@@ -437,7 +487,8 @@ def _update_wifi_settings(connection, connection_uuid, name, interface, zone,
 
 
 def add_wifi_connection(name, interface, zone, ssid, mode, auth_mode,
-                        passphrase, ipv4_method, ipv4_address):
+                        passphrase, ipv4_method, ipv4_address, ipv4_netmask,
+                        ipv4_gateway, ipv4_dns, ipv4_second_dns):
     """Add an automatic Wi-Fi connection in network manager.
 
     Return the UUID for the connection.
@@ -445,18 +496,22 @@ def add_wifi_connection(name, interface, zone, ssid, mode, auth_mode,
     connection_uuid = str(uuid.uuid4())
     connection = _update_wifi_settings(
         None, connection_uuid, name, interface, zone, ssid, mode, auth_mode,
-        passphrase, ipv4_method, ipv4_address)
+        passphrase, ipv4_method, ipv4_address, ipv4_netmask,
+        ipv4_gateway, ipv4_dns, ipv4_second_dns)
     client = nm.Client.new(None)
     client.add_connection_async(connection, True, None, _callback, None)
     return connection_uuid
 
 
 def edit_wifi_connection(connection, name, interface, zone, ssid, mode,
-                         auth_mode, passphrase, ipv4_method, ipv4_address):
+                         auth_mode, passphrase, ipv4_method, ipv4_address,
+                         ipv4_netmask, ipv4_gateway, ipv4_dns,
+                         ipv4_second_dns):
     """Edit an existing wifi connection in network manager."""
     _update_wifi_settings(
         connection, connection.get_uuid(), name, interface, zone, ssid, mode,
-        auth_mode, passphrase, ipv4_method, ipv4_address)
+        auth_mode, passphrase, ipv4_method, ipv4_address, ipv4_netmask,
+        ipv4_gateway, ipv4_dns, ipv4_second_dns)
     connection.commit_changes(True)