搬瓦工怎么换IP？搬瓦工怎么更改IP？

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搬瓦工怎么换IP是一个经久不衰的问题。一般出现在国外可访问，国内不可访问的时候，很多人就会心急火燎的找答案。这里就详细介绍一下搬瓦工怎么换IP。

首先介绍一下IP与服务器之间的联系。一般情况下，机房会提供适合服务器运行的环境（无间断电源，温度湿度等）。然后像搬瓦工之类的服务商就会入驻机房，服务商会购买服务器寄放到机房里。服务商这时候会买一些连续的IP，我们称为IP段指向这个机房，在卖VPS的时候从这个IP段的空闲IP池里取出一个IP绑定到VPS上然后卖给大家。也就是说一个机房对应一个IP段，所以一堆服务器会对应一个IP段。如果服务商收回VPS会怎么样？服务商收回VPS后，这个IP就会回到空闲IP池里，等待下一个VPS来使用。

IP段解释：指的是一段连续的IP地址集合，举个例子，192.168.0.1-192.168.0.255就是一个IP段包含255个IP，192.168.1.1-192.168.1.255也是一个IP段。

用过搬瓦工的人都知道搬瓦工的VPS有两种模式，第一种是多机房可选，第二种是独立机房。

首先介绍一下多机房可选的VPS怎么换IP。

多机房可选的VPS可以随时换机房，这是毫无疑问的。换机房随之带来的就是换IP，因为搬瓦工不可能因为你换了机房就把你原来的IP带到别的机房，因为这样不好管理。

所以这里操作就简单了，先关闭你的VPS，然后选择左侧的Migration菜单下的Migration to another DC，然后下一步下一步即可。

换到别的机房后，你的IP就会更改了，假如说，我只是想换IP不换机房，那你就换出去后再换回来就行。如果你还能遇到你以前的IP，那你真是撞大运了，赶紧买彩票吧。

接下来介绍一下独立不可换机房的VPS。

先看搬瓦工官方怎么说：

Hello,

It appears that IP is blocked by GFW.

It is quite easy to verify if your VPS IP was banned by the Great Firewall of China.
As you can see, the VPS responds normally from all countries except for China, where we observe 100% packet loss.
This output may be a bit confusing at first. One would think if an IP was being blocked by a firewall then a traceroute or mtr report would start showing packetloss right after China (where firewalling takes place), however in the above example we can clearly see that only the last hop is affected. This is because GFW is set up so that only return traffic from a certain IP located outside of China is blocked. In other words, GFW does not track packets leaving China; it only tracks packets heading back into China. This means that when you perform a traceroute, only ICMP response packets sent by the last hop (final destination IP) back into China will be affected by firewall. Intermediary hops will not be affected.

Most common reasons of a GFW ban:

* pptpd based VPN (most common)
* unencrypted socks4 or socks5 proxy
* shadowsocks with weak encryption (use AES)
* in some cases openvpn can trigger the ban as well, however we have not been able to gather enough statistics regarding specific scenarios

We found that generally GFW automatically removes the ban when it can no longer detect the "prohibited" service for a few hours to a few days. The best solution in the case of a ban would be the complete removal of all service(s) that could trigger the ban and waiting for some time for the ban to be lifted.

Please keep in mind that we do not have any control over GFW, and we do not know much about how it works. It is our responsibility to make sure our hardware and network stay fully operational, and GFW-related issues are out of scope of our competence.

We know that in some cases our customers are able to clean the ban, however we do not have specific information as to how this is done.

Other customers end up requesting a new IP address. Generally we do not offer IP changes, however considering the issue we can change the IP for you. Due to the manual work involved as well as to compensate for the cost of IPv4, we would have to bill $19.00 for this service. Your VPS will be assigned a new IP address from the available pool (and we will make sure the new IP is accessible from China when we activate it). Please let us know if you would like to proceed with this option.

Thank you.

Daniel Clay
Bandwagon Host / IT7 Networks