diff --git a/luci-app-passwall/luasrc/model/cbi/passwall/client/node_config.lua b/luci-app-passwall/luasrc/model/cbi/passwall/client/node_config.lua
index f2ced5f22..f384eec26 100644
--- a/luci-app-passwall/luasrc/model/cbi/passwall/client/node_config.lua
+++ b/luci-app-passwall/luasrc/model/cbi/passwall/client/node_config.lua
@@ -36,6 +36,21 @@ end)
 for k, v in pairs(groups) do
 	o:value(k)
 end
+o.write = function(self, section, value)
+	value = api.trim(value)
+	local lower = value:lower()
+
+	if lower == "" or lower == "default" then
+		return m:del(section, self.option)
+	end
+
+	for _, v in ipairs(self.keylist or {}) do
+		if v:lower() == lower then
+			return m:set(section, self.option, v)
+		end
+	end
+	m:set(section, self.option, value)
+end
 
 o = s:option(ListValue, "type", translate("Type"))
 
diff --git a/luci-app-passwall/luasrc/model/cbi/passwall/client/node_subscribe.lua b/luci-app-passwall/luasrc/model/cbi/passwall/client/node_subscribe.lua
index 6a6058741..3a4900923 100644
--- a/luci-app-passwall/luasrc/model/cbi/passwall/client/node_subscribe.lua
+++ b/luci-app-passwall/luasrc/model/cbi/passwall/client/node_subscribe.lua
@@ -176,7 +176,7 @@ o = s:option(Value, "remark", translate("Remarks"))
 o.width = "auto"
 o.rmempty = false
 o.validate = function(self, value, section)
-	value = (value or ""):match("^%s*(.-)%s*$")
+	value = api.trim(value)
 	if value == "" then
 		return nil, translate("Remark cannot be empty.")
 	end
@@ -187,7 +187,7 @@ o.validate = function(self, value, section)
 			return false
 		end
 	end)
-	if duplicate then
+	if duplicate or value:lower() == "default" then
 		return nil, translate("This remark already exists, please change a new remark.")
 	end
 	return value
diff --git a/luci-app-passwall/luasrc/model/cbi/passwall/client/node_subscribe_config.lua b/luci-app-passwall/luasrc/model/cbi/passwall/client/node_subscribe_config.lua
index e78e5ff6f..8619ad967 100644
--- a/luci-app-passwall/luasrc/model/cbi/passwall/client/node_subscribe_config.lua
+++ b/luci-app-passwall/luasrc/model/cbi/passwall/client/node_subscribe_config.lua
@@ -89,7 +89,7 @@ s.dynamic = false
 o = s:option(Value, "remark", translate("Subscribe Remark"))
 o.rmempty = false
 o.validate = function(self, value, section)
-	value = (value or ""):match("^%s*(.-)%s*$")
+	value = api.trim(value)
 	if value == "" then
 		return nil, translate("Remark cannot be empty.")
 	end
@@ -100,7 +100,7 @@ o.validate = function(self, value, section)
 			return false
 		end
 	end)
-	if duplicate then
+	if duplicate or value:lower() == "default" then
 		return nil, translate("This remark already exists, please change a new remark.")
 	end
 	return value
diff --git a/luci-app-passwall/luasrc/view/passwall/node_list/link_add_node.htm b/luci-app-passwall/luasrc/view/passwall/node_list/link_add_node.htm
index 19291fcd8..e71efdbf1 100644
--- a/luci-app-passwall/luasrc/view/passwall/node_list/link_add_node.htm
+++ b/luci-app-passwall/luasrc/view/passwall/node_list/link_add_node.htm
@@ -126,8 +126,16 @@ local api = require "luci.passwall.api"
 			var val = input.value.trim();
 			if (!val) return;
 
+			if (val.toLowerCase() === "default") {
+				var emptyLi = Array.from(list.querySelectorAll(".dropdown-item"))
+					.find(function(el){ return !el.dataset.value; });
+				if (emptyLi) selectItem(emptyLi);
+				input.value = "";
+				return;
+			}
+
 			var li = Array.from(list.querySelectorAll(".dropdown-item")).find(function(el){
-				return el.dataset.value === val;
+				return el.dataset.value.toLowerCase() === val.toLowerCase();
 			});
 			if (!li) {
 				li = document.createElement("li");