VPS 详情里”独立 IPv4″”纯 IPv6″差价很大，纯 v6 的机便宜一截——能买吗？
一句话解释
- IPv4：传统 32 位地址，稀缺、值钱，独立 IPv4 往往要单独加价。
- IPv6：128 位，地址海量、便宜，但国内部分网络（尤其移动数据、老旧宽带）支持不全。
纯 IPv6 的机要注意
“纯 IPv6″=没有独立 IPv4，更便宜，但：
- 访客里有 IPv4-only 用户 → 你的纯 v6 站他们打不开（除非套 CDN 做 v4 入口）。
- 访问只有 IPv4 的外部资源也需要 NAT64 / 隧道。
怎么选
要建给大众访问的站 → 尽量带独立 IPv4；纯自用、预算紧、能套 CDN → 纯 IPv6 可以考虑。
提醒
买前看清是”独立 IPv4″还是 NAT 共享 或纯 IPv6，差别很大。
挑合适的在售机型？去 库存监控 按线路 / 地区筛选。
VPS listings often show a big price gap between “dedicated IPv4” and “IPv6-only” plans — the latter being noticeably cheaper. But should you buy one?
In a Nutshell
- IPv4: The traditional 32-bit addressing system. Scarce and valuable — a dedicated IPv4 address usually costs extra.
- IPv6: 128-bit addressing with an enormous supply and low cost, but support is inconsistent on some Chinese networks (especially mobile data and older broadband connections).
Things to Watch Out for with IPv6-Only Plans
“IPv6-only” means no dedicated IPv4 address, so the price is lower — but there are caveats:
- Visitors who are IPv4-only won’t be able to reach your site (unless you front it with a CDN that provides an IPv4 entry point).
- Accessing external resources that are IPv4-only also requires NAT64 or tunneling.
How to Choose
For a site serving the general public → go for a dedicated IPv4 if possible. For personal use only, tight budget, or if you can use a CDN → IPv6-only is worth considering.
Heads Up
Before buying, check carefully whether you’re getting a “dedicated IPv4”, a shared NAT address, or pure IPv6 — the differences are significant.
Looking for the right available plan? Go to the stock monitor to filter by route and region.
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