From 1277397e200c7aab65ff2a811c52a61b44cfe0b2 Mon Sep 17 00:00:00 2001
From: salem <77879189@qq.com>
Date: Sun, 6 Sep 2026 19:54:51 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0=20=E9=98=B2=E7=81=AB?=
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 ###Debian12 封禁中国大陆 IP 访问 40000‑50000 端口
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 ####说明：封禁大陆 IP 段，有两种主流方案：**iptables + ipset（性能好，推荐）**、直接 iptables 批量添加规则（IP 段多，规则膨胀，不推荐）。端口范围：TCP+UDP 40000‑50000。
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