diff --git a/internal/utils/lookup.go b/internal/utils/lookup.go
index fb3b6c9a..8e6fb1ea 100644
--- a/internal/utils/lookup.go
+++ b/internal/utils/lookup.go
@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"github.com/TeaOSLab/EdgeCommon/pkg/configutils"
 	"github.com/miekg/dns"
 )
 
@@ -16,13 +17,19 @@ func LookupCNAME(host string) (string, error) {
 
 	m.SetQuestion(host+".", dns.TypeCNAME)
 	m.RecursionDesired = true
-	r, _, err := c.Exchange(m, config.Servers[0]+":"+config.Port)
-	if err != nil {
-		return "", err
-	}
-	if len(r.Answer) == 0 {
-		return "", nil
-	}
 
-	return r.Answer[0].(*dns.CNAME).Target, nil
+	var lastErr error
+	for _, serverAddr := range config.Servers {
+		r, _, err := c.Exchange(m, configutils.QuoteIP(serverAddr)+":"+config.Port)
+		if err != nil {
+			lastErr = err
+			continue
+		}
+		if len(r.Answer) == 0 {
+			continue
+		}
+
+		return r.Answer[0].(*dns.CNAME).Target, nil
+	}
+	return "", lastErr
 }
diff --git a/internal/web/actions/default/servers/server/settings/dns/index.go b/internal/web/actions/default/servers/server/settings/dns/index.go
index 7deb7055..56ec72b6 100644
--- a/internal/web/actions/default/servers/server/settings/dns/index.go
+++ b/internal/web/actions/default/servers/server/settings/dns/index.go
@@ -3,6 +3,7 @@ package dns
 import (
 	"github.com/TeaOSLab/EdgeAdmin/internal/web/actions/actionutils"
 	"github.com/TeaOSLab/EdgeCommon/pkg/rpc/pb"
+	"github.com/iwind/TeaGo/actions"
 )
 
 type IndexAction struct {
@@ -28,6 +29,28 @@ func (this *IndexAction) RunGet(params struct {
 	} else {
 		this.Data["dnsDomain"] = ""
 	}
+	this.Data["supportCNAME"] = dnsInfoResp.SupportCNAME
 
 	this.Show()
 }
+
+func (this *IndexAction) RunPost(params struct {
+	ServerId     int64
+	SupportCNAME bool
+
+	Must *actions.Must
+	CSRF *actionutils.CSRF
+}) {
+	defer this.CreateLogInfo("修改服务 %d 的DNS设置", params.ServerId)
+
+	_, err := this.RPC().ServerRPC().UpdateServerDNS(this.AdminContext(), &pb.UpdateServerDNSRequest{
+		ServerId:     params.ServerId,
+		SupportCNAME: params.SupportCNAME,
+	})
+	if err != nil {
+		this.ErrorPage(err)
+		return
+	}
+
+	this.Success()
+}
diff --git a/internal/web/actions/default/servers/server/settings/dns/init.go b/internal/web/actions/default/servers/server/settings/dns/init.go
index ab0110d4..d75e5c9e 100644
--- a/internal/web/actions/default/servers/server/settings/dns/init.go
+++ b/internal/web/actions/default/servers/server/settings/dns/init.go
@@ -14,6 +14,7 @@ func init() {
 			Helper(serverutils.NewServerHelper()).
 			Prefix("/servers/server/settings/dns").
 			GetPost("", new(IndexAction)).
+			Post("/regenerateCNAME", new(RegenerateCNAMEAction)).
 			EndAll()
 	})
 }
diff --git a/internal/web/actions/default/servers/server/settings/dns/regenerateCNAME.go b/internal/web/actions/default/servers/server/settings/dns/regenerateCNAME.go
new file mode 100644
index 00000000..57271685
--- /dev/null
+++ b/internal/web/actions/default/servers/server/settings/dns/regenerateCNAME.go
@@ -0,0 +1,26 @@
+// Copyright 2021 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package dns
+
+import (
+	"github.com/TeaOSLab/EdgeAdmin/internal/web/actions/actionutils"
+	"github.com/TeaOSLab/EdgeCommon/pkg/rpc/pb"
+)
+
+type RegenerateCNAMEAction struct {
+	actionutils.ParentAction
+}
+
+func (this *RegenerateCNAMEAction) RunPost(params struct {
+	ServerId int64
+}) {
+	defer this.CreateLogInfo("重新生成服务 %d 的CNAME", params.ServerId)
+
+	_, err := this.RPC().ServerRPC().RegenerateServerCNAME(this.AdminContext(), &pb.RegenerateServerCNAMERequest{ServerId: params.ServerId})
+	if err != nil {
+		this.ErrorPage(err)
+		return
+	}
+
+	this.Success()
+}
diff --git a/web/views/@default/servers/server/settings/dns/index.html b/web/views/@default/servers/server/settings/dns/index.html
index 651964f9..7719ae30 100644
--- a/web/views/@default/servers/server/settings/dns/index.html
+++ b/web/views/@default/servers/server/settings/dns/index.html
@@ -3,13 +3,25 @@
 {$template "/left_menu"}
 
 <div class="right-box">
-	<table class="ui table selectable definition">
-		<tr>
-			<td class="title">当前服务CNAME</td>
-			<td>
-				<span id="cname-text">{{dnsName}}.<span v-if="dnsDomain.length > 0">{{dnsDomain}}.</span><span v-else>根域名</span></span> &nbsp; <copy-to-clipboard :v-target="'cname-text'"></copy-to-clipboard>
-				<p class="comment">可以在DNS设置一个CNAME记录，名字为你自己的域名，值为上面这个值。</p>
-			</td>
-		</tr>
-	</table>
+    <form class="ui form" data-tea-action="$" data-tea-success="success">
+        <csrf-token></csrf-token>
+        <input type="hidden" name="serverId" :value="serverId"/>
+        <table class="ui table selectable definition">
+            <tr>
+                <td class="title">当前服务CNAME</td>
+                <td>
+                    <span id="cname-text">{{dnsName}}.<span v-if="dnsDomain.length > 0">{{dnsDomain}}.</span><span v-else>根域名</span></span> &nbsp; <copy-to-clipboard :v-target="'cname-text'"></copy-to-clipboard> &nbsp;<a href="" @click.prevent="regenerateCNAME()">[重新生成]</a>
+                    <p class="comment">可以在DNS设置一个CNAME记录，名字为你自己的域名，值为上面这个值。</p>
+                </td>
+            </tr>
+            <tr>
+                <td>支持CNAME</td>
+                <td>
+                    <checkbox name="supportCNAME" v-model="supportCNAME"></checkbox>
+                    <p class="comment">选中后表示允许任意域名使用此服务的CNAME直接访问此服务。需要节点服务器可以正确解析DNS记录。在严格匹配域名时才会生效。</p>
+                </td>
+            </tr>
+        </table>
+        <submit-btn></submit-btn>
+    </form>
 </div>
\ No newline at end of file
diff --git a/web/views/@default/servers/server/settings/dns/index.js b/web/views/@default/servers/server/settings/dns/index.js
new file mode 100644
index 00000000..41f75934
--- /dev/null
+++ b/web/views/@default/servers/server/settings/dns/index.js
@@ -0,0 +1,14 @@
+Tea.context(function () {
+	this.success = NotifyReloadSuccess("保存成功")
+
+	this.regenerateCNAME = function () {
+		let serverId = this.serverId
+		teaweb.confirm("确定要重新生成此服务的CNAME吗？", function () {
+			this.$post(".regenerateCNAME")
+				.params({
+					serverId: serverId
+				})
+				.refresh()
+		})
+	}
+})
\ No newline at end of file