Configuring a proxy in Chrome, Firefox and at the operating-system level

Which credentials to use#

Use a distinct session identifier for each independent workflow, where the assigned gateway supports it. Confirm the permitted duration and location parameters in your connection details. A residential device can disconnect before the requested duration; a sticky session is not a guarantee of the same IP for days. For a fixed address, compare a dedicated static product.

Chrome and Chromium#

• Chrome uses the operating system's proxy settings by default; change them there (below) and every Chromium browser follows.
• For one dedicated profile, start Chrome with flags: --proxy-server=\"http://res.proxy-cyber.com:9000\" --user-data-dir=/tmp/proxprofile. The first navigation asks for the username and password.
• SOCKS5 with remote DNS: --proxy-server=\"socks5://res.proxy-cyber.com:9001\" --host-resolver-rules=\"MAP * ~NOTFOUND , EXCLUDE res.proxy-cyber.com\" keeps DNS from leaking (whitelisted IP required: Chrome cannot send SOCKS5 credentials).
• Extensions such as SwitchyOmega switch profiles per site and store credentials, useful when you alternate between direct and proxied browsing.

Firefox#

1. Settings → Network Settings → Manual proxy configuration.
2. HTTP Proxy res.proxy-cyber.com, port 9000, tick "Also use this proxy for HTTPS". Or SOCKS Host res.proxy-cyber.com, port 9001, SOCKS v5, and tick Proxy DNS when using SOCKS v5.
3. In about:config, set media.peerconnection.enabled to false to stop WebRTC from revealing your real address.
4. Firefox asks for the proxy credentials on the first request and can remember them per profile.

macOS#

System Settings → Network → your interface → Details → Proxies: enable Web Proxy (HTTP) and Secure Web Proxy (HTTPS) with res.proxy-cyber.com and port 9000, tick "Proxy server requires password" and enter the sticky username and password. Safari and most apps follow the system setting; some command-line tools do not, use the environment variables instead.

Windows#

Settings → Network & Internet → Proxy → Manual proxy setup: address res.proxy-cyber.com, port 9000. Windows has no field for credentials; Edge and Chrome will prompt on first use, or whitelist your IP. Add localhost;127.* to the exceptions.

A PAC file for selective proxying#

function FindProxyForURL(url, host) {
  // Only these sites go through the German exit; everything else is direct
  if (dnsDomainIs(host, ".example.de") || shExpMatch(host, "*.shop-example.de")) {
    return "PROXY res.proxy-cyber.com:9000";
  }
  return "DIRECT";
}

Point the browser or OS at the PAC URL (a local file works in Firefox; Chrome and Windows prefer an http:// URL). Credentials are still prompted or whitelisted.

Verify before you trust it#

• Open an IP-echo page: the address must be the exit, in the country you asked.
• Open a WebRTC leak test: only the exit should appear.
• Check the browser's language and time zone match the exit if the site cares about consistency.

Questions people ask#