diff --git a/internal/web/actions/default/clusters/cluster/settings/dns/index.go b/internal/web/actions/default/clusters/cluster/settings/dns/index.go
index 951eeac9..a4e84c94 100644
--- a/internal/web/actions/default/clusters/cluster/settings/dns/index.go
+++ b/internal/web/actions/default/clusters/cluster/settings/dns/index.go
@@ -52,6 +52,7 @@ func (this *IndexAction) RunGet(params struct {
 		this.Data["cnameRecords"] = dnsInfoResp.CnameRecords
 	}
 	this.Data["ttl"] = dnsInfoResp.Ttl
+	this.Data["cnameAsDomain"] = dnsInfoResp.CnameAsDomain
 
 	this.Show()
 }
@@ -65,6 +66,9 @@ func (this *IndexAction) RunPost(params struct {
 	ServersAutoSync bool
 	CnameRecords    []string
 	Ttl             int32
+	CnameAsDomain   bool
+
+	ConfirmResetDomain bool // 是否确认重置域名
 
 	Must *actions.Must
 	CSRF *actionutils.CSRF
@@ -72,13 +76,15 @@ func (this *IndexAction) RunPost(params struct {
 	// 创建日志
 	defer this.CreateLog(oplogs.LevelInfo, "修改集群 %d DNS设置", params.ClusterId)
 
-	if params.DnsDomainId <= 0 {
-		this.Fail("请选择集群的主域名")
-	}
+	if !params.ConfirmResetDomain {
+		if params.DnsDomainId <= 0 {
+			this.Fail("请选择集群的主域名")
+		}
 
-	params.Must.
-		Field("dnsName", params.DnsName).
-		Require("请输入DNS子域名")
+		params.Must.
+			Field("dnsName", params.DnsName).
+			Require("请输入DNS子域名")
+	}
 
 	// 检查DNS名称
 	if len(params.DnsName) > 0 {
@@ -108,6 +114,7 @@ func (this *IndexAction) RunPost(params struct {
 		ServersAutoSync: params.ServersAutoSync,
 		CnameRecords:    params.CnameRecords,
 		Ttl:             params.Ttl,
+		CnameAsDomain:   params.CnameAsDomain,
 	})
 	if err != nil {
 		this.ErrorPage(err)
diff --git a/web/views/@default/clusters/cluster/settings/dns/index.html b/web/views/@default/clusters/cluster/settings/dns/index.html
index bfa6d297..52182a18 100644
--- a/web/views/@default/clusters/cluster/settings/dns/index.html
+++ b/web/views/@default/clusters/cluster/settings/dns/index.html
@@ -16,6 +16,13 @@
                     <p class="comment">用于生成集群节点和网站服务的DNS解析记录<span v-if="domainId > 0">，修改后将自动删除旧域名中的相关记录</span>。</p>
 				</td>
 			</tr>
+            <tr v-if="oldDomain.id > 0 && domain.id == 0">
+                <td>不使用主域名</td>
+                <td>
+                    <checkbox name="confirmResetDomain"></checkbox>
+                    <p class="comment">选中后，表示确认当前集群不使用主域名；否则必须选择一个主域名。</p>
+                </td>
+            </tr>
 			<tr>
 				<td class="title">DNS子域名 *</td>
 				<td>
@@ -47,6 +54,13 @@
                         </div>
                         <p class="comment">每个DNS服务商或者账号的TTL限制各有不同，请注意取值范围。0表示使用默认。</p>
                     </td>
+                </tr>
+                <tr>
+                    <td>允许通过CNAME访问网站服务</td>
+                    <td>
+                        <checkbox name="cnameAsDomain" v-model="cnameAsDomain"></checkbox>
+                        <p class="comment">选中后，表示允许使用CNAME直接访问网站服务；如果取消选中，则表示CNAME只作为DNS解析记录使用。</p>
+                    </td>
                 </tr>
 				<tr>
 					<td>是否同步节点DNS状态</td>
diff --git a/web/views/@default/clusters/cluster/settings/dns/index.js b/web/views/@default/clusters/cluster/settings/dns/index.js
index 3efea6fa..d0166817 100644
--- a/web/views/@default/clusters/cluster/settings/dns/index.js
+++ b/web/views/@default/clusters/cluster/settings/dns/index.js
@@ -2,6 +2,7 @@ Tea.context(function () {
 	this.success = NotifyReloadSuccess("保存成功")
 
 	this.domain = {id: this.domainId, name: this.domainName}
+	this.oldDomain = {id: this.domainId, name: this.domainName}
 	this.changeDomain = function (domain) {
 		this.domain.id = domain.id
 		this.domain.name = domain.name