Guides

Practical how-to tutorials for proxies and web scraping. Set up datacenter proxies on Windows or Mac, rotate them in Python, connect Selenium, and avoid blocks.

Java Proxy Settings: Fix JVM 407 and Ignored Proxies

Java proxy settings that work: which JVM properties HttpClient reads, why Basic auth gets 407 on HTTPS, and the startup flag that fixes it, with a check each.

SparkProxy·Nov 7, 2026Guides

Sticky Session IP Changing Mid-Flow? Causes and Fixes

Sticky session IP changing mid-login or checkout? Check leaks, session ID format, the 5-minute window, parallel connections and exit churn in order.

SparkProxy·Nov 6, 2026Guides

httpx proxies Argument Removed? Fix ProxyError and 407

The httpx proxies argument is gone in 0.28. Fix the TypeError, then ProxyError 407, SOCKS ImportError and RemoteProtocolError, with verbatim errors and code.

SparkProxy·Nov 6, 2026Guides

npm config set proxy: Install Packages Behind a Proxy

npm config set proxy and https-proxy, the right .npmrc file, yarn and pnpm equivalents, noproxy for private registries, and keeping passwords out of your repo.

SparkProxy·Nov 6, 2026Guides

Rotating Proxy Not Rotating? Fix Same-IP Responses

Rotating proxy same IP every request? Your client reuses one CONNECT tunnel or a sticky setting survived. Fix it in requests, httpx, Node, Playwright.

SparkProxy·Nov 6, 2026Guides

SSL WRONG_VERSION_NUMBER With a Proxy: The Fix

Getting SSL WRONG_VERSION_NUMBER through a proxy in Python? It's almost always https:// in the proxy URL. The one-character fix, plus every SSLEOFError cause.

SparkProxy·Nov 5, 2026Guides

pip install Proxy Setup: --proxy, pip.conf and Env Vars

pip install proxy setup that works: the --proxy flag, pip.conf, PIP_PROXY vs HTTPS_PROXY precedence, encoded passwords, and the SSL error a wrong scheme causes.

SparkProxy·Nov 5, 2026Guides

Proxy Not Working on Certain Websites? How to Fix It

Proxy not working on certain websites but fine everywhere else? Tell a block from a port, TLS/SNI or DNS fault with one command each, then apply the right fix.

SparkProxy·Nov 5, 2026Guides

curl Proxy CONNECT Aborted? Exit Codes 5, 7, 35, 56 Fixed

curl proxy CONNECT aborted, (7) failed to connect, or a 407 after CONNECT? Map each curl exit code to the hop that failed, read the -v line, and fix it.

SparkProxy·Nov 5, 2026Guides

Git Config Proxy Setup for HTTPS and SSH Remotes

Git config proxy setup that works: http.proxy globally or per remote, URL-encoded credentials, no_proxy, unsetting it, and ProxyCommand for SSH remotes.

SparkProxy·Nov 4, 2026Guides

Sign In to Confirm You're Not a Bot: Fix yt-dlp on a VPS

yt-dlp says sign in to confirm you're not a bot on your server? Triage it cheapest-first, then fix it with PO tokens, cookies, the right proxy or the API.

SparkProxy·Nov 4, 2026Guides

The Proxy Server Is Refusing Connections in Firefox: Fix

Fix 'The proxy server is refusing connections' in Firefox: what really triggers it, a cheapest-first diagnosis order, the fix per cause, and an exit IP check.

SparkProxy·Nov 4, 2026Guides

How to Set Proxy on Android With a Username and Password

How to set proxy on Android when Wi-Fi settings have no password field: whitelist your IP, run a local auth forwarder, or use adb's global proxy, then verify.

SparkProxy·Nov 4, 2026Guides

Google 'Unusual Traffic' Error With Proxies: Fix

Our systems have detected unusual traffic through proxies? Find the cause in order (IP rate, consent, query strings, subnet) and detect the sorry page in code.

SparkProxy·Nov 3, 2026Guides

Fix net::ERR_TUNNEL_CONNECTION_FAILED in Puppeteer

net::ERR_TUNNEL_CONNECTION_FAILED in Puppeteer or Playwright? Map it to one of four causes, reproduce each with curl, then use launch code that works.

SparkProxy·Nov 3, 2026Guides

How to Set Up a Proxy on iPhone and iPad (Wi-Fi)

How to set up proxy on iPhone and iPad with a username and password, why it only covers one Wi-Fi network, how to stop password prompts and check the exit IP.

SparkProxy·Nov 3, 2026Guides

Rate Limited Despite Rotating Proxies: Why It Happens

Rate limited even with rotating proxies? The site's counter is probably keyed on a cookie, API key, fingerprint or subnet. Find the key and rotate it too.

SparkProxy·Nov 3, 2026Guides

Selenium Chrome Proxy Login Popup: How to Fix It

Fix the Selenium proxy authentication popup and ERR_NO_SUPPORTED_PROXIES: why Chrome drops user:pass, plus three tested fixes with working Python code.

SparkProxy·Nov 2, 2026Guides

How to Use a Proxy for Only One Application

Route one browser, scraper or CLI tool through a proxy while the rest of the machine stays direct: app settings, launch flags, env vars, proxychains, Proxifier.

SparkProxy·Nov 2, 2026Guides

Scraper Stopped Working Suddenly? A 10-Minute Triage

Scraper stopped working overnight after weeks of clean runs? Split site changed, site blocked you and proxy changed in 10 minutes, with a fix and code for each.

SparkProxy·Nov 2, 2026Guides

Fix ProxyError: Cannot Connect to Proxy in Python Requests

ProxyError cannot connect to proxy in Python requests? Decode the urllib3 traceback to the real cause (refused, DNS, timeout, 407, env vars) and fix it fast.

SparkProxy·Nov 2, 2026Guides

netsh winhttp set proxy: Windows Proxy From the CLI

Use netsh winhttp set proxy, reg.exe and HTTP_PROXY to script a Windows proxy on servers and fleets, and see which layer each app reads and what auth it allows.

SparkProxy·Nov 2, 2026Guides

Website Blocks AWS IP but Works Locally: Fix the 403

Scraper fine on your laptop but 403 once deployed? When a website blocks AWS IP space, confirm it in two commands and proxy only the scraping traffic.

SparkProxy·Nov 1, 2026Guides

Fix ERR_PROXY_CONNECTION_FAILED in Chrome

Fix ERR_PROXY_CONNECTION_FAILED in Chrome: test the proxy host and port once, find the Windows, macOS, extension or policy setting, then back out cleanly.

SparkProxy·Nov 1, 2026Guides