Guides, tutorials, and analysis from the ColdProxy team on proxy services, web scraping, IP rotation, online privacy, and public-data collection. Learn how residential IPv4, residential IPv6, and datacenter IPv6 proxies work — and pick the right one for scraping, ad verification, social media, and e-commerce.
Proxy procurement has moved away from opaque enterprise contracts toward verifiable specs and public pricing. Technical buyers evaluating an Oxylabs alternative in 2026 want measurable success rates and predictable…
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Chunked transfer encoding can be removed or recoded by an HTTP-aware intermediary, so client-visible chunks prove framing on one connection only.
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HTTP keep alive explains why three requests may share one client socket while a proxy manages a separate destination connection with its own lifetime.
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Accept-Encoding negotiation produced a 30,038-byte gzip body and a 145,043-byte identity body in a ColdProxy HTML test, with equal decoded length and hash.
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An IPv6 URL needs square brackets around a literal address so a parser can separate the host from an optional port.
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Live IP checks call for Cache-Control: no-store when reused response bytes could make a changed public exit look unchanged.
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A reverse DNS lookup returned zero PTR names in our direct-connection control, while ColdProxy's public IPv4 endpoint completed with HTTP 200.
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Happy Eyeballs races IPv6 and IPv4 connections. Through a proxy, gateway addresses may compete first, while reused sockets can skip a later race.
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Server Name Indication (SNI) produced a clear result in our direct ColdProxy TLS test: 3 of 3 handshakes worked with SNI; 3 of 3 failed without it.
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