首页 \ 问答 \ ping或curl无效域重定向到Linux上的本地服务器(ping or curl invalid domains redirects to local server on Linux)

ping或curl无效域重定向到Linux上的本地服务器(ping or curl invalid domains redirects to local server on Linux)

 当我尝试ping或检索无效域时，我会重定向到本地服务器上的默认域。 例如：尝试从我的服务器s1.mylocaldomain.com ping www.invaliddomainnameexample.com 
 

~: ping www.invaliddomainnameexample.com
PING www.invaliddomainnameexample.com.mylocaldomain.com (67.877.87.128) 56(84) bytes of data.
64 bytes from mylocaldomain.com (67.877.87.128): icmp_seq=1 ttl=64 time=0.040 ms
64 bytes from mylocaldomain.com (67.877.87.128): icmp_seq=2 ttl=64 time=0.039 ms

 

 或使用卷曲 
 

~: curl -I www.invaliddomainnameexample.com
HTTP/1.1 301 Moved Permanently
Date: Mon, 26 Nov 2012 16:09:57 GMT
Content-Type: text/html
Content-Length: 223
Connection: keep-alive
Keep-Alive: timeout=10
Location: http://mylocaldomain.com/

 

 我的resolve.conf 
 

~: cat /etc/resolv.conf 
nameserver 8.8.8.8
nameserver 8.8.4.4


When I try to ping or retrieve an invalid domain, I get redirect to default domain on my local server. ex: trying to ping www.invaliddomainnameexample.com from my server s1.mylocaldomain.com
 

~: ping www.invaliddomainnameexample.com
PING www.invaliddomainnameexample.com.mylocaldomain.com (67.877.87.128) 56(84) bytes of data.
64 bytes from mylocaldomain.com (67.877.87.128): icmp_seq=1 ttl=64 time=0.040 ms
64 bytes from mylocaldomain.com (67.877.87.128): icmp_seq=2 ttl=64 time=0.039 ms

 

or using curl
 

~: curl -I www.invaliddomainnameexample.com
HTTP/1.1 301 Moved Permanently
Date: Mon, 26 Nov 2012 16:09:57 GMT
Content-Type: text/html
Content-Length: 223
Connection: keep-alive
Keep-Alive: timeout=10
Location: http://mylocaldomain.com/

 

my resolve.conf
 

~: cat /etc/resolv.conf 
nameserver 8.8.8.8
nameserver 8.8.4.4


原文：
更新时间：2022-03-17 11:03

最满意答案

 首先，为什么不在大多数时间使用该信息（来自Quirksmode的PPK关于devicePixelRatio ） 
 

 
 
 Retina iPhone在纵向模式下的宽度为640个物理像素。 尽管如此，使用元视口的网站不应该变成640px宽，而是保持在320，这是iPhone的最佳阅读尺寸。 
 

 

 其次，当您仍想要专门针对高分辨率设备（Apple称为Retina）时，您应该阅读Cross Browser Retina /高分辨率媒体查询 ，其中最短的片段是： 
 

@media 
  only screen and (-webkit-min-device-pixel-ratio: 2), 
  only screen and (min-resolution: 192dpi) { 
    /* Retina-specific stuff here */
}

 

 但还有其他一些内容以及之前3篇关于Windows Phone，Opera Mini，Firefox OS以及现有不同比率的有趣文章和更新的链接 

First, why not to use that information most of the time (from PPK at Quirksmode about devicePixelRatio)
 

 
 
Retina iPhones have a width of 640 physical pixels in portrait mode. Still, websites that use the meta viewport should not become 640px wide, but instead remain at 320, which is the optimal reading size for the iPhone.
 

 

Second, when you still want to target specifically high resolution devices (called Retina by Apple), you should read Cross Browser Retina/High Resolution Media Queries where the shortest snippet is:
 

@media 
  only screen and (-webkit-min-device-pixel-ratio: 2), 
  only screen and (min-resolution: 192dpi) { 
    /* Retina-specific stuff here */
}

 

but there are others and also links to 3 previous interesting articles and updates about Windows Phone, Opera Mini, Firefox OS and different ratios that now exist

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