diff --git a/auto_cert_renewal.sh b/auto_cert_renewal.sh
new file mode 100644
index 0000000..088fb98
--- /dev/null
+++ b/auto_cert_renewal.sh
@@ -0,0 +1,64 @@
+#!/bin/bash
+
+# 定义证书存储目录
+certs_directory="/home/web/certs/"
+days_before_expiry=5  # 设置在证书到期前几天触发续签
+
+# 遍历所有证书文件
+for cert_file in $certs_directory*_cert.pem; do
+    # 获取域名
+    domain=$(basename "$cert_file" "_cert.pem")
+
+    # 输出正在检查的证书信息
+    echo "检查证书过期日期： ${domain}"
+
+    # 获取证书过期日期
+    expiration_date=$(openssl x509 -enddate -noout -in "${certs_directory}${domain}_cert.pem" | cut -d "=" -f 2-)
+
+    # 输出证书过期日期
+    echo "过期日期： ${expiration_date}"
+
+    # 将日期转换为时间戳
+    expiration_timestamp=$(date -d "${expiration_date}" +%s)
+    current_timestamp=$(date +%s)
+
+    # 计算距离过期还有几天
+    days_until_expiry=$(( ($expiration_timestamp - $current_timestamp) / 86400 ))
+
+    # 检查是否需要续签（在满足续签条件的情况下）
+    if [ $days_until_expiry -le $days_before_expiry ]; then
+        echo "证书将在${days_before_expiry}天内过期，正在进行自动续签。"
+
+        # 停止 Nginx
+        docker stop nginx
+
+        iptables -P INPUT ACCEPT
+        iptables -P FORWARD ACCEPT
+        iptables -P OUTPUT ACCEPT
+        iptables -F
+    
+        ip6tables -P INPUT ACCEPT
+        ip6tables -P FORWARD ACCEPT
+        ip6tables -P OUTPUT ACCEPT
+        ip6tables -F
+
+        # 续签证书
+        # certbot certonly --standalone -d $domain --email your@email.com --agree-tos --no-eff-email --force-renewal
+        certbot certonly --standalone -d $domain --email your@email.com --agree-tos --no-eff-email --force-renewal --key-type ecdsa
+
+        # 复制续签后的证书和私钥
+        cp /etc/letsencrypt/live/$domain/fullchain.pem ${certs_directory}${domain}_cert.pem
+        cp /etc/letsencrypt/live/$domain/privkey.pem ${certs_directory}${domain}_key.pem
+
+        # 启动 Nginx
+        docker start nginx
+
+        echo "证书已成功续签。"
+    else
+        # 若未满足续签条件，则输出证书仍然有效
+        echo "证书仍然有效，距离过期还有 ${days_until_expiry} 天。"
+    fi
+
+    # 输出分隔线
+    echo "--------------------------"
+done
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