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Datacenter proxies support two ways to authenticate. Pick whichever fits your setup — both can be active at the same time.

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Username & Password

The default method, and the one that works everywhere. Your credentials are included in every request:
You’ll find your username and password in the dashboard, and you can reset them there at any time. Resetting takes effect within a few minutes — update any running scripts before you rotate credentials, or they’ll start failing with 407 errors.
Some tools (older browser extensions, certain game clients) can’t handle proxy credentials. If yours is one of them, use IP whitelisting instead.

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IP Whitelisting

Instead of sending credentials, you register the IP of the machine that will use the proxies. Requests coming from a whitelisted IP go through without a username or password:
To set it up:
  1. Find your server’s public IP (for example via api.ipify.org)
  2. Add it under IP Whitelist in the dashboard
  3. Wait a minute or two for the change to propagate, then test a request
Keep in mind:
  • Whitelisting only helps if your machine has a static IP. If your ISP rotates your IP, requests will start failing with 407 until you update the whitelist.
  • You can whitelist multiple IPs, e.g. your production server and your office.
  • Remove IPs you no longer use — anyone on a whitelisted IP can use your bandwidth.

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Troubleshooting

Still stuck? See Error Handling or email team@roundproxies.com.