diff --git a/.luacheckrc b/.luacheckrc
index e0a64b544a53658056f21a205ed2a75c63426a49..2f491ca2534b3cccf6857a0e177bbd4efcfc0277 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -63,6 +63,7 @@ files["package/**/luasrc/lib/gluon/config-mode/*"] = {
 		"translate",
 		"translatef",
 		"Value",
+		"Element",
 	},
 }
 
diff --git a/package/gluon-config-mode-theme/files/lib/gluon/config-mode/www/static/gluon.css b/package/gluon-config-mode-theme/files/lib/gluon/config-mode/www/static/gluon.css
index 3365f449dee2b7dc496507dcc42654b7817a4887..c84ac01bed58e39f76421614e15e9465f740e91e 100644
--- a/package/gluon-config-mode-theme/files/lib/gluon/config-mode/www/static/gluon.css
+++ b/package/gluon-config-mode-theme/files/lib/gluon/config-mode/www/static/gluon.css
@@ -1 +1 @@
-html{min-height:100%;height:auto;position:relative}body,input,select,option{font-family:'Open Sans', Arial, sans-serif;font-size:12pt}body{color:#4d4e53;line-height:1.5em;margin:0;display:flex;flex-direction:column;min-height:100vh;background-color:#f3f3f3}.tabmenu1{text-align:center}ul.tabmenu{list-style:none;padding:0;margin:2em 0;display:inline-flex}ul.tabmenu li{white-space:nowrap;margin:0 0.5em;padding:0;text-align:center}ul.tabmenu li a{display:block;text-decoration:none;padding:1em;margin:0;color:#333;border-radius:2em}ul.tabmenu li a:hover{background:#ffe9b3}ul.tabmenu li.active a{font-weight:bold;background:white;color:#333}#maincontent ul{margin-left:2em}.error{color:#ff0000;background-color:white}#menubar{display:flex;background:#dc0067;color:#ffffff}#menubar a:link.topcat,#menubar a:visited.topcat{position:relative;display:block;padding:0.5em;text-decoration:none;font-size:80%;font-weight:normal;color:white}#menubar a:link.topcat:hover,#menubar a:link.topcat:focus,#menubar a:visited.topcat:hover,#menubar a:visited.topcat:focus{background:#ffb400;color:black}#menubar a:link.topcat.active,#menubar a:visited.topcat.active{background:#ffb400;color:black;font-weight:bold}#menubar .hostinfo{position:relative;margin:0;padding:0.5em;flex:1;font-weight:bold;font-size:80%}#menubar .hostinfo a:link,#menubar .hostinfo a:visited{text-decoration:none;font-weight:bold;color:white}#menubar .hostinfo a:link:hover,#menubar .hostinfo a:link:focus,#menubar .hostinfo a:visited:hover,#menubar .hostinfo a:visited:focus{text-decoration:underline}#topmenu{list-style:none;margin:0;padding:0}#topmenu li{display:inline-block}#maincontent{padding:0 1em 2em;max-width:60em;min-width:40em;margin:1em auto}#maincontent p{margin-bottom:1em}.gluon-section{margin:0;padding:0;border:none;margin-bottom:1.3em}.gluon-section:last-child{margin-bottom:0.7em}.gluon-section legend{font-size:1.4em;font-weight:bold;position:relative;padding:0;margin-bottom:0.5em}.gluon-section h2{margin:0em 0 0.5em -0.5em}.gluon-section h3{text-decoration:none;font-weight:bold;color:#555555;margin:0.25em;font-size:100%}.gluon-section-descr{margin-bottom:2em}.gluon-osm-map{width:100%;height:40em;margin-bottom:1em}input::placeholder{color:#aaaaaa}input::-webkit-input-placeholder{color:#aaaaaa}input[type=checkbox]{display:none}input[type=checkbox]+label{display:inline-block;position:relative;width:1em;height:1em;margin:0}input[type=checkbox]:checked+label::after{content:'✔';color:#dc0067;vertical-align:middle;position:absolute;top:50%;left:0;margin-top:-0.5em;width:100%;text-align:center;font-size:1.7em}input[type=radio]{display:none}input[type=radio]+label{display:inline-block;position:relative;width:0.8em;height:0.8em;padding:0.5em;margin:0.2em 0.2em 0.2em 0.1em;border:none;background:#ffe199;vertical-align:middle;border-radius:50%}input[type=radio]:checked+label::after{content:'•';color:#dc0067;vertical-align:middle;position:absolute;top:50%;left:0;margin-top:-0.4em;width:100%;text-align:center;font-size:2em}input[type=submit],input[type=reset],input[type=button]{cursor:pointer}select,input,textarea,input[type=checkbox]+label{color:#003247;border:none;background:#ffe199;border-radius:3pt;padding:0.5em;margin-top:1px;margin-bottom:2px;box-sizing:content-box;outline:0}.select-wrapper{position:relative;display:inline-block}.select-wrapper::before{position:absolute;z-index:1;right:0.05em;top:calc(2px + 0.1em);bottom:calc(2px + 0.1em);width:1.4em;border-left:0.05em solid rgba(0,0,0,0.25);pointer-events:none;background:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="8" height="5"><path fill="none" stroke="black" stroke-linejoin="bevel" d="M1,1L4,4L7,1"/></svg>') center/0.8em 0.5em no-repeat;content:''}.select-wrapper select{-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer}option{color:#003247;background:#ffe199}select,input[type=text],input[type=password]{min-width:20em}.gluon-button{display:inline-block;line-height:normal;white-space:nowrap;vertical-align:baseline;text-align:center;cursor:pointer;user-select:none;font-size:100%;padding:0.5em 1em;color:rgba(0,0,0,0.8);background-color:#E6E6E6;border:none;text-decoration:none;border-radius:2px;transition:0.1s linear box-shadow;margin-left:0.5em;background-repeat:no-repeat}.gluon-button::-moz-focus-inner{padding:0;border:0}.gluon-button:active{box-shadow:0 0 0 1px rgba(0,0,0,0.15) inset,0 0 6px rgba(0,0,0,0.2) inset}.gluon-button:focus{outline:0}.gluon-button:hover,.gluon-button:focus{background-image:linear-gradient(transparent, rgba(0,0,0,0.05) 40%, rgba(0,0,0,0.1))}.gluon-button[disabled]{border:none;background-image:none;opacity:0.40;cursor:not-allowed;box-shadow:none}.gluon-button-reset{background-color:#e30;color:#fff}.gluon-button-submit{background-color:#009ee0;color:#fff}.gluon-button-submit:active{background:grey}.gluon-input-invalid{background:#e30 !important;color:white}textarea{margin-left:-1px;margin-bottom:0.5em}.gluon-value{display:flex;flex-direction:row;margin-bottom:0.5em}.gluon-section-node .gluon-value:last-child{margin-bottom:0}.gluon-value-title{flex:2;text-align:right;padding-top:0.39em;padding-right:1em;font-weight:bold}.gluon-value-field{flex:3;position:relative}.gluon-value-field input,.gluon-value-field select,.gluon-value-field input+label{position:relative}.gluon-value-field-text{flex:3;padding-top:0.39em}.gluon-value-field-long{flex:10;position:relative;margin-top:0.65em}.gluon-value-field-long input,.gluon-value-field-long select,.gluon-value-field-long input+label{position:relative}.gluon-value-field-long-after{flex:2}.gluon-value-description{font-size:8pt}.gluon-form-descr{margin-bottom:1em}.gluon-form-descr:empty,.gluon-section-descr:empty{display:none}.gluon-form-descr,.gluon-section-descr,.gluon-page-actions{padding:1em;background:#ececec}.gluon-page-actions{text-align:right;display:flex;flex-flow:row-reverse}.gluon-section-node{clear:both;position:relative;border:none}.gluon-value-error input,.gluon-value-error select{background-color:#ffcccc}.gluon-add::after,.gluon-remove::after{cursor:pointer;display:inline-block;text-align:center;vertical-align:middle;font-size:180%;width:1.2em;height:1em}.gluon-add{color:#008000;position:relative;left:21em}input+.gluon-add{left:0;top:0.04em}.gluon-add:first-child{top:0.53em;left:-0.08em}.gluon-add::after{content:'+'}.gluon-remove{color:#800000;position:relative;top:-0.03em}.gluon-remove::after{content:'–'}.error500{border:1px dotted #ff0000;background-color:#ffffff;color:#000000;padding:0.5em}.errorbox{border:1px solid #FF0000;background-color:#FFCCCC;padding:5px;margin-bottom:5px}.errorbox a{color:#000000 !important}.the-key{text-align:left;font-size:1.4em;background:#ffe9b3;border:3pt dashed #dc0067;margin-bottom:0.5em;padding:0.5em}
+html{min-height:100%;height:auto;position:relative}body,input,select,option{font-family:'Open Sans', Arial, sans-serif;font-size:12pt}body{color:#4d4e53;line-height:1.5em;margin:0;display:flex;flex-direction:column;min-height:100vh;background-color:#f3f3f3}.tabmenu1{text-align:center}ul.tabmenu{list-style:none;padding:0;margin:2em 0;display:inline-flex}ul.tabmenu li{white-space:nowrap;margin:0 0.5em;padding:0;text-align:center}ul.tabmenu li a{display:block;text-decoration:none;padding:1em;margin:0;color:#333;border-radius:2em}ul.tabmenu li a:hover{background:#ffe9b3}ul.tabmenu li.active a{font-weight:bold;background:white;color:#333}#maincontent ul{margin-left:2em}.error{color:#ff0000;background-color:white}#menubar{display:flex;background:#dc0067;color:#ffffff}#menubar a:link.topcat,#menubar a:visited.topcat{position:relative;display:block;padding:0.5em;text-decoration:none;font-size:80%;font-weight:normal;color:white}#menubar a:link.topcat:hover,#menubar a:link.topcat:focus,#menubar a:visited.topcat:hover,#menubar a:visited.topcat:focus{background:#ffb400;color:black}#menubar a:link.topcat.active,#menubar a:visited.topcat.active{background:#ffb400;color:black;font-weight:bold}#menubar .hostinfo{position:relative;margin:0;padding:0.5em;flex:1;font-weight:bold;font-size:80%}#menubar .hostinfo a:link,#menubar .hostinfo a:visited{text-decoration:none;font-weight:bold;color:white}#menubar .hostinfo a:link:hover,#menubar .hostinfo a:link:focus,#menubar .hostinfo a:visited:hover,#menubar .hostinfo a:visited:focus{text-decoration:underline}#topmenu{list-style:none;margin:0;padding:0}#topmenu li{display:inline-block}#maincontent{padding:0 1em 2em;max-width:60em;min-width:40em;margin:1em auto}#maincontent p{margin-bottom:1em}.gluon-section{margin:0;padding:0;border:none;margin-bottom:1.3em}.gluon-section:last-child{margin-bottom:0.7em}.gluon-section legend{font-size:1.4em;font-weight:bold;position:relative;padding:0;margin-bottom:0.5em}.gluon-section h2{margin:0em 0 0.5em -0.5em}.gluon-section h3{text-decoration:none;font-weight:bold;color:#555555;margin:0.25em;font-size:100%}.gluon-section-descr,.gluon-warning{margin-bottom:2em}.gluon-osm-map{width:100%;height:40em;margin-bottom:1em}input::placeholder{color:#aaaaaa}input::-webkit-input-placeholder{color:#aaaaaa}input[type=checkbox]{display:none}input[type=checkbox]+label{display:inline-block;position:relative;width:1em;height:1em;margin:0}input[type=checkbox]:checked+label::after{content:'✔';color:#dc0067;vertical-align:middle;position:absolute;top:50%;left:0;margin-top:-0.5em;width:100%;text-align:center;font-size:1.7em}input[type=radio]{display:none}input[type=radio]+label{display:inline-block;position:relative;width:0.8em;height:0.8em;padding:0.5em;margin:0.2em 0.2em 0.2em 0.1em;border:none;background:#ffe199;vertical-align:middle;border-radius:50%}input[type=radio]:checked+label::after{content:'•';color:#dc0067;vertical-align:middle;position:absolute;top:50%;left:0;margin-top:-0.4em;width:100%;text-align:center;font-size:2em}input[type=submit],input[type=reset],input[type=button]{cursor:pointer}select,input,textarea,input[type=checkbox]+label{color:#003247;border:none;background:#ffe199;border-radius:3pt;padding:0.5em;margin-top:1px;margin-bottom:2px;box-sizing:content-box;outline:0}.select-wrapper{position:relative;display:inline-block}.select-wrapper::before{position:absolute;z-index:1;right:0.05em;top:calc(2px + 0.1em);bottom:calc(2px + 0.1em);width:1.4em;border-left:0.05em solid rgba(0,0,0,0.25);pointer-events:none;background:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="8" height="5"><path fill="none" stroke="black" stroke-linejoin="bevel" d="M1,1L4,4L7,1"/></svg>') center/0.8em 0.5em no-repeat;content:''}.select-wrapper select{-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer}option{color:#003247;background:#ffe199}select,input[type=text],input[type=password]{min-width:20em}.gluon-button{display:inline-block;line-height:normal;white-space:nowrap;vertical-align:baseline;text-align:center;cursor:pointer;user-select:none;font-size:100%;padding:0.5em 1em;color:rgba(0,0,0,0.8);background-color:#E6E6E6;border:none;text-decoration:none;border-radius:2px;transition:0.1s linear box-shadow;margin-left:0.5em;background-repeat:no-repeat}.gluon-button::-moz-focus-inner{padding:0;border:0}.gluon-button:active{box-shadow:0 0 0 1px rgba(0,0,0,0.15) inset,0 0 6px rgba(0,0,0,0.2) inset}.gluon-button:focus{outline:0}.gluon-button:hover,.gluon-button:focus{background-image:linear-gradient(transparent, rgba(0,0,0,0.05) 40%, rgba(0,0,0,0.1))}.gluon-button[disabled]{border:none;background-image:none;opacity:0.40;cursor:not-allowed;box-shadow:none}.gluon-button-reset{background-color:#e30;color:#fff}.gluon-button-submit{background-color:#009ee0;color:#fff}.gluon-button-submit:active{background:grey}.gluon-input-invalid{background:#e30 !important;color:white}textarea{margin-left:-1px;margin-bottom:0.5em}.gluon-value{display:flex;flex-direction:row;margin-bottom:0.5em}.gluon-section-node .gluon-value:last-child{margin-bottom:0}.gluon-value-title{flex:2;text-align:right;padding-top:0.39em;padding-right:1em;font-weight:bold}.gluon-value-field{flex:3;position:relative}.gluon-value-field input,.gluon-value-field select,.gluon-value-field input+label{position:relative}.gluon-value-field-text{flex:3;padding-top:0.39em}.gluon-value-field-long{flex:10;position:relative;margin-top:0.65em}.gluon-value-field-long input,.gluon-value-field-long select,.gluon-value-field-long input+label{position:relative}.gluon-value-field-long-after{flex:2}.gluon-value-description{font-size:8pt}.gluon-form-descr{margin-bottom:1em}.gluon-form-descr:empty,.gluon-section-descr:empty,.gluon-warning:empty{display:none}.gluon-form-descr,.gluon-section-descr,.gluon-warning,.gluon-page-actions{padding:1em;background:#ececec}.gluon-page-actions{text-align:right;display:flex;flex-flow:row-reverse}.gluon-section-node{clear:both;position:relative;border:none}.gluon-value-error input,.gluon-value-error select{background-color:#ffcccc}.gluon-add::after,.gluon-remove::after{cursor:pointer;display:inline-block;text-align:center;vertical-align:middle;font-size:180%;width:1.2em;height:1em}.gluon-add{color:#008000;position:relative;left:21em}input+.gluon-add{left:0;top:0.04em}.gluon-add:first-child{top:0.53em;left:-0.08em}.gluon-add::after{content:'+'}.gluon-remove{color:#800000;position:relative;top:-0.03em}.gluon-remove::after{content:'–'}.gluon-warning{background:#ffe9b3}.error500{border:1px dotted #ff0000;background-color:#ffffff;color:#000000;padding:0.5em}.errorbox{border:1px solid #FF0000;background-color:#FFCCCC;padding:5px;margin-bottom:5px}.errorbox a{color:#000000 !important}.the-key{text-align:left;font-size:1.4em;background:#ffe9b3;border:3pt dashed #dc0067;margin-bottom:0.5em;padding:0.5em}
diff --git a/package/gluon-config-mode-theme/sass/gluon.scss b/package/gluon-config-mode-theme/sass/gluon.scss
index 5e1aeda7dc04ed88a141c54a5b5cc509bb277cdd..fb6808fc51fddce9aba0ca2b6d57dd70ad14c3d8 100644
--- a/package/gluon-config-mode-theme/sass/gluon.scss
+++ b/package/gluon-config-mode-theme/sass/gluon.scss
@@ -518,6 +518,11 @@ textarea {
 	}
 }
 
+.gluon-warning {
+	@extend .gluon-section-descr;
+	background: lighten($ffyellow, 35);
+}
+
 .error500 {
 	border: 1px dotted #ff0000;
 	background-color: #ffffff;
diff --git a/package/gluon-web-model/files/lib/gluon/web/view/model/warning.html b/package/gluon-web-model/files/lib/gluon/web/view/model/warning.html
new file mode 100644
index 0000000000000000000000000000000000000000..41688b77fab7d3d2d3710e2d89f12ac4840e1617
--- /dev/null
+++ b/package/gluon-web-model/files/lib/gluon/web/view/model/warning.html
@@ -0,0 +1,14 @@
+<%- if self.title or self.content then -%>
+<div class="gluon-warning"<%=
+  attr("id", id) ..
+  attr("data-index", self.index) ..
+  attr("data-depends", self:deplist(self.deps))
+%>>
+  <%- if self.content then -%>
+  <%=self.content%>
+  <%- else -%>
+  <b><%=self.title%></b><br>
+  <%=self.description%>
+  <%- end -%>
+</div>
+<%- end -%>
diff --git a/package/gluon-web-model/luasrc/usr/lib/lua/gluon/web/model/classes.lua b/package/gluon-web-model/luasrc/usr/lib/lua/gluon/web/model/classes.lua
index 2ec0d71fa648a76f8d289d81224f11c9d04e7a31..88f378c00716ea37d25b400fa9a54ba2dae02cc9 100644
--- a/package/gluon-web-model/luasrc/usr/lib/lua/gluon/web/model/classes.lua
+++ b/package/gluon-web-model/luasrc/usr/lib/lua/gluon/web/model/classes.lua
@@ -196,7 +196,6 @@ function Template:__init__(template)
 	self.template = template
 end
 
-
 local AbstractValue = class(Node)
 M.AbstractValue = AbstractValue
 
@@ -411,6 +410,25 @@ function TextValue:__init__(...)
 end
 
 
+local Element = class(Node)
+M.Element = Element
+
+function Element:__init__(template, kv, ...)
+	Node.__init__(self, ...)
+
+	self.default   = nil
+	self.size      = nil
+	self.optional  = false
+
+	self.template  = template
+
+	for key, value in pairs(kv) do
+		self[key] = value
+	end
+
+	self.error = false
+end
+
 local Section = class(Node)
 M.Section = Section
 
@@ -427,6 +445,11 @@ function Section:option(t, ...)
 	return obj
 end
 
+function Section:element(...)
+	local obj  = Element(...)
+	self:append(obj)
+	return obj
+end
 
 local Form = class(Node)
 M.Form = Form
diff --git a/package/gluon-web-private-wifi/luasrc/lib/gluon/config-mode/model/admin/privatewifi.lua b/package/gluon-web-private-wifi/luasrc/lib/gluon/config-mode/model/admin/privatewifi.lua
index 8be95ed6c000da70ba6ac8df82965e791884a59e..4f4cf45906bef11d26499f48a9ba649068123053 100644
--- a/package/gluon-web-private-wifi/luasrc/lib/gluon/config-mode/model/admin/privatewifi.lua
+++ b/package/gluon-web-private-wifi/luasrc/lib/gluon/config-mode/model/admin/privatewifi.lua
@@ -1,5 +1,6 @@
 local uci = require("simple-uci").cursor()
 local wireless = require 'gluon.wireless'
+local util = require 'gluon.util'
 
 -- where to read the configuration from
 local primary_iface = 'wan_radio0'
@@ -13,9 +14,26 @@ local s = f:section(Section, nil, translate(
 	.. 'at the same time.'
 ))
 
+local uplink_interfaces = util.get_role_interfaces(uci, 'uplink')
+local mesh_on_wan = false
+
+for _, iface in ipairs(util.get_role_interfaces(uci, 'mesh')) do
+	if util.contains(uplink_interfaces, iface) then
+		mesh_on_wan = true
+	end
+end
+
 local enabled = s:option(Flag, "enabled", translate("Enabled"))
 enabled.default = uci:get('wireless', primary_iface) and not uci:get_bool('wireless', primary_iface, "disabled")
 
+local warning = s:element('model/warning', {
+	content = mesh_on_wan and translate(
+		'Meshing on WAN interface is enabled.' ..
+		'This can lead to problems.'
+	) or nil,
+}, 'warning')
+warning:depends(enabled, true)
+
 local ssid = s:option(Value, "ssid", translate("Name (SSID)"))
 ssid:depends(enabled, true)
 ssid.datatype = "maxlength(32)"