Billal Ainaoui
Billal Ainaoui is the founder of HProxy.com. He started it to make honest proxy infrastructure anyone can afford, and he still reads every support message himself. The guides he signs come from the prices, tests and support questions the team works with every day. HProxy sells proxies, so weigh his view with that in mind.
Founder of HProxy.com · 1666 articles
Guide
Cloudflare error 520: what it means and how to fix it
Cloudflare error 520 means the site's own server answered Cloudflare badly. The causes Cloudflare lists, what a visitor can do, and what the owner must check.
October 10, 2026 · 7 min read
Explainer
Concurrency vs parallelism in web scraping: requests, threads and proxies
Concurrency overlaps waiting, parallelism runs work on several cores. We timed both on 100 pages in Python: threads and asyncio for fetching, processes for parsing.
October 10, 2026 · 7 min read
Tutorial
cURL download file: save files, resume downloads and use a proxy
How to download a file with curl: -o and -O, server file names, folders, redirect and error pages, resuming, retries, checking the file and proxies, all tested.
October 10, 2026 · 14 min read
Tutorial
cURL follow redirects: -L, limits and redirects through a proxy
How to make curl follow redirects with -L, see where a redirect goes, set a limit, keep a POST a POST, protect logins and cookies, and redirect through a proxy.
October 10, 2026 · 10 min read
Tutorial
cURL headers: send, show and debug HTTP headers
How to send, replace, remove and read HTTP headers with curl: -H, -I, -i, -D, -w and -v, headers meant for a proxy, and which headers survive a redirect.
October 10, 2026 · 10 min read
Tutorial
cURL ignore SSL: when -k is safe and how to fix the certificate instead
How to make curl ignore SSL errors with -k, what each certificate error means, and the fixes that keep the check on: --cacert, pinning, proxies and Windows.
October 10, 2026 · 10 min read
Tutorial
cURL POST request: form data, JSON and file uploads
How to send a POST with curl: form fields with -d, JSON with --json, uploads with -F, the @ and & traps, JSON quoting on Windows, and POSTs through a proxy.
October 10, 2026 · 9 min read
Review
DataImpulse.com: the company, its owners and its history
DataImpulse's terms name Softoria LLC of Florida, part of Ukraine's Softoria group. Bytemarket OU of Estonia came first. The record since 2003.
October 10, 2026 · 16 min read
Review
Decodo.com, formerly Smartproxy: the company, its owners and its history
Decodo is Smartproxy renamed. Run by Data troops, UAB in Vilnius, backed by Tesonet since 2024: the owners, old names and record since 2018.
October 10, 2026 · 19 min read
Guide
Discord IP ban explained: how it works, how long it lasts and what to do
Discord says server bans are based on IP addresses, while its own suspensions are tied to accounts. How each ban works, how long it lasts and what to do.
October 10, 2026 · 10 min read
Guide
Facebook session expired error: why it happens and how to fix it
Facebook says session expired when the login your browser or app used has ended. What ends it, from Meta's own pages and our test, and the fixes in order.
October 10, 2026 · 13 min read
Explainer
Fake IP address: what it means, what works and what does not
A site sees the address its connection comes from, so a made-up IP never gets a reply. The four things called a fake IP, which one works, and which addresses to use in examples.
October 10, 2026 · 6 min read
Guide
Instagram action block: causes, wait times and the proxy mistakes behind it
Why Instagram blocks a like, follow or comment, where it shows how long the block lasts, how to get the action back, and the proxy mistakes that add to it.
October 10, 2026 · 7 min read
Guide
Instagram challenge required error: what triggers it and how to clear it
Instagram's challenge_required error means it wants proof that a login is yours. What triggers it, how each tool reports it, and how to clear it safely.
October 10, 2026 · 10 min read
Guide
Instagram feedback required error: what it means and how to fix it
Instagram's feedback_required error reports a blocked action, the same block the app shows as Try again later. What triggers it and how to fix it.
October 10, 2026 · 8 min read
Guide
Instagram IP ban explained: how to tell, how long it lasts and what fixes it
Does Instagram ban IP addresses? What an address limit looks like, two tests to tell it from an account ban, how long it lasts and what fixes it.
October 10, 2026 · 8 min read
Explainer
IP whitelisting for proxies: what it is and how to set it up
What IP whitelisting means for a proxy, which public address the proxy checks, why NAT and IPv6 break it, and what a miss returns. Tested on October 10, 2026.
October 10, 2026 · 13 min read
Review
NodeMaven.com: who runs it, its owners and its history
NodeMaven is sold by NodeMaven FZ LLC of Ras Al Khaimah. Until mid-2025 its contract named AAA Abmer OÜ under Estonian law. The record since 2023.
October 10, 2026 · 14 min read
Review
Oxylabs.io: the company once called Tesonet, its owners and its history
Oxylabs is sold by Oxylabs, UAB, the Vilnius firm set up as UAB Tesonet in 2008 and owned by Coretech LT. The owners, the lawsuits and the record.
October 10, 2026 · 27 min read
Review
Proxy-Cheap.com: the company, its owners and its history
Proxy-Cheap names no company. Its marks belong to UAB Lietparkas, a Vilnius firm founded in 2012, and a Wyoming LLC publishes its add-on. The full record.
October 10, 2026 · 17 min read
Review
ProxyLine.net: who runs it, its history and its connections
ProxyLine's contract names no company, but its app, its address blocks and its own Trustpilot profile lead to Cyprus. The record since 2018.
October 10, 2026 · 18 min read
Explainer
Public vs private IP address: the difference and what a proxy changes
A private IP works only inside its own network, and a public IP is the one websites see. The ranges, three edge cases from our test, and what a proxy changes.
October 10, 2026 · 9 min read
Guide
Python requests timeout: set it, handle it and fix proxy timeouts
Set a timeout on every Python requests call, see which error each stall raises, and why a dead proxy slips past except Timeout. Tested on three versions.
October 10, 2026 · 11 min read
Review
Rayobyte.com, formerly Blazing SEO: the company, its owners and its history
Rayobyte is a trade name of Blazing SEO, LLC, a Colorado company Neil Emeigh formed in 2015. Its owners, related firms, IP blocks and record to 2026.
October 10, 2026 · 24 min read
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