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Why a NAT VPS can cost $1: the economics of an IPv4 address

natbox.io10 points15 comments
Screenshot of Why a NAT VPS can cost $1: the economics of an IPv4 address

The explanation for a $1 NAT VPS is that customers share a public IPv4 address rather than receiving one each. IPv4 addresses are scarce: the piece cites 2026 purchase prices around $20, wholesale monthly leases of roughly $0.35-$0.60, and a hosting-provider retail charge of €3.50 per extra address. Natbox divides each host’s address among dozens of servers, assigning each customer a private block of ports. On its three hosts, a single address served 56, 31, and 14 customer servers, respectively; even at the cited retail price, the address costs less than ten cents per server on the busiest host. Web traffic on ports 80 and 443 is routed by domain through a proxy.

The low price comes with limits: SSH and other services use assigned port numbers instead of standard ones, only ports in the customer’s block are reachable over IPv4, and outgoing email ports are blocked to reduce the risk of a shared address being blacklisted. Abuse by one user can also affect others sharing that address. By contrast, each server receives its own routed IPv6 /80, with many addresses and all ports available. The service is therefore presented as suitable for modest Linux workloads - such as bots, small websites, VPNs, monitoring, and learning - but not for users who require a dedicated IPv4 address with unrestricted ports.

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