Copy five values from one product: protocol, host, port, username, and password. Put the endpoint in the browser or operating-system proxy settings, then enter credentials when the client asks. If the browser never prompts, verify the protocol and port before resetting passwords.
Key points
- Host and port identify the endpoint; username and password authenticate the buyer.
- Some browsers use system proxy settings while others can keep a separate profile.
- A timeout, an authentication error, and an unchanged IP point to different problems.
Keep the five values together
Use the protocol, host, port, username, and password from the same active product. A frequent setup error is combining an HTTP port with a SOCKS5 mode or copying credentials from an expired endpoint.
Do not paste a credential-bearing proxy URL into screenshots, tickets, or shared documents. If a support case needs an example, redact the password and most of the username.
Configure, then run two separate checks
First open a normal permitted HTTPS page. Then check the visible exit IP with a service you trust. The first test catches basic connection and certificate problems; the second confirms that traffic actually uses the proxy.
Firefox can use its own connection settings. Chrome-family browsers often follow platform or managed policy settings. The exact menu changes over time, so use the current vendor documentation for the installed browser.
- authentication error: recheck username, password, and active term;
- timeout: recheck host, port, protocol, firewall, and network path;
- site opens but IP is unchanged: confirm the browser is using the configured profile;
- prompt repeats: remove stale saved credentials and retry once;
- only one site fails: check that destination's rules and status.
Do not weaken the browser to make a proxy work
Do not disable certificate validation, browser security warnings, or system protections to force a connection. A proxy endpoint should work through supported settings.
If the purchased product does not list the protocol the browser needs, choose a compatible live product instead of guessing ports.
FAQ
Where do I enter the proxy username and password?
Configure the protocol, host, and port first. Many clients request the username and password on the first connection; managed profiles or extensions may expose dedicated credential fields.
Why does the browser keep asking for proxy credentials?
The credentials may be wrong or stale, the product may be inactive, or the protocol and port may not match. Re-copy all five values from the active product before changing browser security settings.
Why does the proxy connection time out?
A timeout usually points to the endpoint, port, protocol, firewall, or network path rather than the password. Test the documented endpoint and confirm the product is active.
Sources
Technical statements are checked against primary documentation.