域名和服务器ip地址都能ping通，但是网站打不开，telnet也不通

柔光的暖阳◎ 2023-06-11 12:26 51阅读 0赞

//能ping通
    $ ping 47.104.172.222
    
    PING lglicai.com (47.104.172.222): 56 data bytes
    64 bytes from 47.104.172.222: icmp_seq=0 ttl=50 time=23.539 ms
    64 bytes from 47.104.172.222: icmp_seq=1 ttl=50 time=25.957 ms
    64 bytes from 47.104.172.222: icmp_seq=2 ttl=50 time=24.811 ms
    
    
    //telnet不通
    $ telnet 47.104.172.222 80
    
    Trying 47.104.172.222...

在浏览器输入服务器ip地址，出现下面的情况  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70][]  
这种情况一般都是端口的问题，查看一下阿里云中云服务器的80端口是否开启

**解决方法**  
（1）登录阿里云服务器，打开控制台，点击进入到云服务器实例中  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70 1]  
选择本实例安全组，并点击下图部分  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70 2]

列表中没有的端口就是没有授权，telnet不通的原因就在这，我们现在添加上，点击右上角的【添加安全组规则】按钮  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70 3]  
根据下图设置，添加80端口的规则【其他端口的设置方式与80端口一样】  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70 4]  
添加完成后效果如下  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70 5]  
现在telnet就通了

//telnet通了
    $ telnet 47.104.172.222 80
    
    Trying 47.104.172.222...
    Connected to 47.104.172.222.
    Escape character is '^]'.

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70]: /images/20230531/ceeafae050714c86a7637da755fec895.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70 1]: /images/20230531/941b6ee524ad408f80683c8c146e5bf4.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70 2]: /images/20230531/c810f8b51c474d78933a97ba74acc1f9.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70 3]: /images/20230531/20e6eec6e2a1466f84d3aeb2957210b4.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70 4]: /images/20230531/d0e0afa96b344311b44a112047ce94b3.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NoaW5lX2E_size_16_color_FFFFFF_t_70 5]: /images/20230531/bcb7f9fd6ff34a16a5344207a555518d.png