Protocols & authentication · glossary

IPv4 and IPv6 proxies

IPv4 and IPv6 are the two versions of the Internet Protocol. IPv4 addresses are scarce, expensive and accepted everywhere, which is why serious proxy networks are built on them. IPv6 addresses are practically unlimited and cheap, so IPv6 proxies are sold in huge quantities at low prices, but a large share of websites do not accept IPv6 connections at all and those that do apply stricter scoring to /64 blocks. For general web work, IPv4 is the safe default.

1 min read Also called IPv6 proxy Updated

Limits & fair use All terms

Comparison#

IPv4IPv6
SupplyScarce; drives the price of static proxiesEffectively unlimited
Target supportUniversalPartial; many sites are IPv4-only
Reputation granularityPer addressPer /64 block, so one bad neighbour taints thousands of addresses
Residential poolsThe normRare

Destinations over IPv6#

Some networks refuse to connect to IPv6-only destinations because their exits sit on IPv4 households. Dual-stack sites work normally since the exit picks IPv4.

How it works at ProxShift#

Every ProxShift exit is IPv4, and the gateways connect to destinations over IPv4; IPv6-only destinations are not reachable. Whitelisting accepts IPv4 source addresses.

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