diff --git a/pkg/plugin/driver.go b/pkg/plugin/driver.go
index 300e786..1a15919 100644
--- a/pkg/plugin/driver.go
+++ b/pkg/plugin/driver.go
@@ -118,6 +118,7 @@ func GenerateConnectionString(settings Settings, version string) (string, error)
 	}
 
 	if settings.TlsMode != "disable" &&
+	    settings.TlsMode != "prefer" &&
 		settings.TlsMode != "require" &&
 		settings.TlsMode != "verify-ca" &&
 		settings.TlsMode != "verify-full" {
diff --git a/pkg/plugin/driver_test.go b/pkg/plugin/driver_test.go
index 7cd711b..0b67017 100644
--- a/pkg/plugin/driver_test.go
+++ b/pkg/plugin/driver_test.go
@@ -118,7 +118,7 @@ func TestConnect(t *testing.T) {
 
 	var tlsModes []string
 	if tlsEnabled == "true" {
-		tlsModes = []string{"require", "verify-ca", "verify-full"}
+		tlsModes = []string{"prefer", "require", "verify-ca", "verify-full"}
 	} else {
 		tlsModes = []string{"disable"}
 	}
diff --git a/src/selectors.ts b/src/selectors.ts
index e9ea07f..1848562 100644
--- a/src/selectors.ts
+++ b/src/selectors.ts
@@ -13,12 +13,12 @@ export const Components = {
     },
     Username: {
       label: 'Username',
-      placeholder: 'Username',
+      placeholder: 'admin',
       tooltip: 'QuestDB username',
     },
     Password: {
       label: 'Password',
-      placeholder: 'Password',
+      placeholder: 'quest',
       tooltip: 'QuestDB password',
     },
     TLSCACert: {
diff --git a/src/types.ts b/src/types.ts
index dd72294..9d15417 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -4,6 +4,7 @@ export const defaultQuery: Partial<QuestDBQuery> = {};
 
 export enum PostgresTLSModes {
   disable = 'disable',
+  prefer = 'prefer',
   require = 'require',
   verifyCA = 'verify-ca',
   verifyFull = 'verify-full',
diff --git a/src/views/QuestDBConfigEditor.tsx b/src/views/QuestDBConfigEditor.tsx
index ed39371..ef011b7 100644
--- a/src/views/QuestDBConfigEditor.tsx
+++ b/src/views/QuestDBConfigEditor.tsx
@@ -100,6 +100,7 @@ export const ConfigEditor: React.FC<Props> = (props) => {
 
   const tlsModes: Array<SelectableValue<PostgresTLSModes>> = [
     { value: PostgresTLSModes.disable, label: 'disable' },
+    { value: PostgresTLSModes.prefer, label: 'prefer' },
     { value: PostgresTLSModes.require, label: 'require' },
     { value: PostgresTLSModes.verifyCA, label: 'verify-ca' },
     { value: PostgresTLSModes.verifyFull, label: 'verify-full' },
@@ -127,7 +128,8 @@ export const ConfigEditor: React.FC<Props> = (props) => {
           <Input
             name="server"
             width={40}
-            value={jsonData.server || ''}
+            value={jsonData.server}
+            defaultValue={Components.ConfigEditor.ServerAddress.placeholder}
             onChange={onUpdateDatasourceJsonDataOption(props, 'server')}
             label={Components.ConfigEditor.ServerAddress.label}
             aria-label={Components.ConfigEditor.ServerAddress.label}
@@ -142,8 +144,9 @@ export const ConfigEditor: React.FC<Props> = (props) => {
           <Input
             name="port"
             width={40}
-            type="number"
+            type="string"
             value={jsonData.port || ''}
+            defaultValue={Components.ConfigEditor.ServerPort.placeholder}
             onChange={(e) => onPortChange(e.currentTarget.value)}
             label={Components.ConfigEditor.ServerPort.label}
             aria-label={Components.ConfigEditor.ServerPort.label}
@@ -161,7 +164,8 @@ export const ConfigEditor: React.FC<Props> = (props) => {
           <Input
             name="user"
             width={40}
-            value={jsonData.username || ''}
+            value={jsonData.username}
+            defaultValue={Components.ConfigEditor.Username.placeholder}
             onChange={onUpdateDatasourceJsonDataOption(props, 'username')}
             label={Components.ConfigEditor.Username.label}
             aria-label={Components.ConfigEditor.Username.label}
@@ -175,7 +179,8 @@ export const ConfigEditor: React.FC<Props> = (props) => {
             label={Components.ConfigEditor.Password.label}
             aria-label={Components.ConfigEditor.Password.label}
             placeholder={Components.ConfigEditor.Password.placeholder}
-            value={secureJsonData.password || ''}
+            value={secureJsonData.password}
+            defaultValue={Components.ConfigEditor.Password.placeholder}
             isConfigured={(secureJsonFields && secureJsonFields.password) as boolean}
             onReset={onResetPassword}
             onChange={onUpdateDatasourceSecureJsonDataOption(props, 'password')}
@@ -286,7 +291,7 @@ export const ConfigEditor: React.FC<Props> = (props) => {
               width={40}
               className="gf-form"
               options={tlsModes}
-              value={jsonData.tlsMode || PostgresTLSModes.verifyFull}
+              value={jsonData.tlsMode || PostgresTLSModes.prefer}
               onChange={(e) =>  onTlsModeChange(e.value)}
               placeholder={Components.ConfigEditor.TlsMode.placeholder}
           />