diff --git a/dnsapi/README.md b/dnsapi/README.md
index fa0780b0..b5b73f47 100644
--- a/dnsapi/README.md
+++ b/dnsapi/README.md
@@ -409,10 +409,13 @@ acme.sh --issue --dns dns_dgon -d example.com -d www.example.com
 
 ## 21. Use ClouDNS.net API
 
-You need to set the HTTP API user ID and password credentials. See: https://www.cloudns.net/wiki/article/42/
+You need to set the HTTP API user ID and password credentials. See: https://www.cloudns.net/wiki/article/42/. For security reasons, it's recommended to use a sub user ID that only has access to the necessary zones, as a regular API user has access to your entire account.
 
 ```
-export CLOUDNS_AUTH_ID=XXXXX
+# Use this for a sub auth ID
+export CLOUDNS_SUB_AUTH_ID=XXXXX
+# Use this for a regular auth ID
+#export CLOUDNS_AUTH_ID=XXXXX
 export CLOUDNS_AUTH_PASSWORD="YYYYYYYYY"
 ```
 
diff --git a/dnsapi/dns_cloudns.sh b/dnsapi/dns_cloudns.sh
index b1861b24..4a1ae641 100755
--- a/dnsapi/dns_cloudns.sh
+++ b/dnsapi/dns_cloudns.sh
@@ -4,6 +4,7 @@
 # Repository: https://github.com/ClouDNS/acme.sh/
 
 #CLOUDNS_AUTH_ID=XXXXX
+#CLOUDNS_SUB_AUTH_ID=XXXXX
 #CLOUDNS_AUTH_PASSWORD="YYYYYYYYY"
 CLOUDNS_API="https://api.cloudns.net"
 
@@ -97,17 +98,19 @@ _dns_cloudns_init_check() {
   fi
 
   CLOUDNS_AUTH_ID="${CLOUDNS_AUTH_ID:-$(_readaccountconf_mutable CLOUDNS_AUTH_ID)}"
+  CLOUDNS_SUB_AUTH_ID="${CLOUDNS_SUB_AUTH_ID:-$(_readaccountconf_mutable CLOUDNS_SUB_AUTH_ID)}"
   CLOUDNS_AUTH_PASSWORD="${CLOUDNS_AUTH_PASSWORD:-$(_readaccountconf_mutable CLOUDNS_AUTH_PASSWORD)}"
-  if [ -z "$CLOUDNS_AUTH_ID" ] || [ -z "$CLOUDNS_AUTH_PASSWORD" ]; then
+  if [ -z "$CLOUDNS_AUTH_ID$CLOUDNS_SUB_AUTH_ID" ] || [ -z "$CLOUDNS_AUTH_PASSWORD" ]; then
     CLOUDNS_AUTH_ID=""
+    CLOUDNS_SUB_AUTH_ID=""
     CLOUDNS_AUTH_PASSWORD=""
     _err "You don't specify cloudns api id and password yet."
     _err "Please create you id and password and try again."
     return 1
   fi
 
-  if [ -z "$CLOUDNS_AUTH_ID" ]; then
-    _err "CLOUDNS_AUTH_ID is not configured"
+  if [ -z "$CLOUDNS_AUTH_ID" ] && [ -z "$CLOUDNS_SUB_AUTH_ID" ]; then
+    _err "CLOUDNS_AUTH_ID or CLOUDNS_SUB_AUTH_ID is not configured"
     return 1
   fi
 
@@ -125,6 +128,7 @@ _dns_cloudns_init_check() {
 
   #save the api id and password to the account conf file.
   _saveaccountconf_mutable CLOUDNS_AUTH_ID "$CLOUDNS_AUTH_ID"
+  _saveaccountconf_mutable CLOUDNS_SUB_AUTH_ID "$CLOUDNS_SUB_AUTH_ID"
   _saveaccountconf_mutable CLOUDNS_AUTH_PASSWORD "$CLOUDNS_AUTH_PASSWORD"
 
   CLOUDNS_INIT_CHECK_COMPLETED=1
@@ -168,12 +172,19 @@ _dns_cloudns_http_api_call() {
   method=$1
 
   _debug CLOUDNS_AUTH_ID "$CLOUDNS_AUTH_ID"
+  _debug CLOUDNS_SUB_AUTH_ID "$CLOUDNS_SUB_AUTH_ID"
   _debug CLOUDNS_AUTH_PASSWORD "$CLOUDNS_AUTH_PASSWORD"
 
-  if [ -z "$2" ]; then
-    data="auth-id=$CLOUDNS_AUTH_ID&auth-password=$CLOUDNS_AUTH_PASSWORD"
+  if [ ! -z "$CLOUDNS_SUB_AUTH_ID" ]; then
+    auth_user="sub-auth-id=$CLOUDNS_SUB_AUTH_ID"
   else
-    data="auth-id=$CLOUDNS_AUTH_ID&auth-password=$CLOUDNS_AUTH_PASSWORD&$2"
+    auth_user="auth-id=$CLOUDNS_AUTH_ID"
+  fi
+
+  if [ -z "$2" ]; then
+    data="$auth_user&auth-password=$CLOUDNS_AUTH_PASSWORD"
+  else
+    data="$auth_user&auth-password=$CLOUDNS_AUTH_PASSWORD&$2"
   fi
 
   response="$(_get "$CLOUDNS_API/$method?$data")"