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ISP proxies support two ways to authenticate. You can use either one, or both at the same time.

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Username and Password

This is the default and works with every tool. You send your credentials with every request:
Proxy URL
Your username and password are in the dashboard, where you can also reset them. A reset takes effect within a few minutes. Update your running scripts first, or they will start failing with 407 errors.
Some tools, such as older browser extensions and some game clients, can’t send proxy credentials. Use IP whitelisting with those.

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IP Whitelisting

Instead of sending credentials, you register the IP of the machine that uses the proxies. Requests from a whitelisted IP work without a username or password:
Proxy URL
To set it up:
  1. Find your machine’s public IP, for example at api.ipify.org.
  2. Add it under IP Whitelist in the dashboard.
  3. Wait a minute or two, then send a test request.
Keep in mind:
  • Whitelisting only works well if your machine has a static IP. If your internet provider changes your IP, requests fail with 407 until you update the whitelist.
  • You can whitelist several IPs, for example your server and your office.
  • Remove IPs you no longer use. Anyone on a whitelisted IP can use your proxies.

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Troubleshooting

Still stuck? See Error Handling or email team@roundproxies.com.
Last modified on October 15, 2026