diff --git a/img/firewall.png b/img/firewall.png
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diff --git a/img/mod_firewall.png b/img/mod_firewall.png
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diff --git a/user_manual.md b/user_manual.md
index cc2af73..0ab97d8 100644
--- a/user_manual.md
+++ b/user_manual.md
@@ -101,4 +101,10 @@
 
 ##### 2.2.5 云主机列表查看主机信息。用完请及时删除主机，如需复用，请制作镜像。
 
-![云主机2](img/info.png)
\ No newline at end of file
+![云主机2](img/info.png)
+
+**2.2.6 防火墙问题和修改方法：进入安全组（防火墙）的资源详情，在规则列表下建议开通icmp协议，源地址设置为0.0.0.0/0***
+
+![云主机2](img/firewall.png)
+
+<img src="img/mod_firewall.png" alt="云主机2" style="zoom:100%;" />
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