Your first mobile proxy connection: from credentials to verification

Open one active proxy and select one protocol. A credential set contains Host, port, username, and password; the portal may also show a direct server IP and the current mobile exit IP. Copy values with one action or from one export so a port from one proxy is never paired with another proxy's password.

Use the recommended gateway for the first connection. Select a direct server endpoint only when the application or an approved diagnostic procedure specifically requires it. Do not enter the exit IP as Host: it appears on the next connection leg and can change normally.

If the application has separate HTTP proxy and SOCKS5 fields, start with the mode documented by that application. An HTTP proxy with CONNECT is often enough for ordinary browser HTTPS and APIs. SOCKS5 fits applications that support its negotiation and the required hostname-resolution mode.

Do not guess by renaming the URL scheme. In curl, socks5 and socks5h differ in where DNS resolution occurs, and an application with an HTTP field may not understand SOCKS5 details. UDP support in the SOCKS5 standard also does not prove that the client, server, and selected service implement it.

Prefer separate Host, Port, Username, and Password fields. If the application accepts one URL, encode special characters according to its documentation. Do not leave that URL in shell history, cloud notes, tickets, or project files. Before taking a screenshot, hide passwords, tokens, email addresses, and neighboring customer rows.

Create a new connection and open an authorized control service. Record the time, response status, and observed exit IP, then repeat against a second authorized destination. Perform the same operation in the real application afterward. This separates proxy health from an application-specific configuration error.

Do not infer the whole device state from one tab: DNS, IPv6, WebRTC, and other applications can have their own routes. For the first connection, prove the scenario you actually need. Add further checks one at a time with a defined expected result.

If the hostname in the proxy Host field cannot be resolved, that is a DNS failure before authentication. The destination hostname can be resolved later by the device or through the proxy, depending on the protocol and application. Connection refused means an active rejection at the address and port, while a timeout only says that the stage did not finish in time. A 407 shows that the HTTP proxy requested authentication: inspect scheme, port, username, password, and application support without rotating the mobile IP.

A support request needs only the M-number or another safe identifier, time, application, protocol, and exact sanitized error text. Do not send the password or repeat an equipment change, purchase, or renewal while the previous command outcome remains unknown.