You can’t make curl click a checkbox on screen. Instead, send the HTTP request the router page expects: include the checkbox’s exact name=value pair, the form’s other required fields, and the same session cookies. The router’s HTML—or the browser request triggered by the checkbox—determines the exact request.
How to submit a router checkbox with curl
First identify how the page sends its settings. The curl project’s guide to scripting HTTP requests and curl manual recommend inspecting the HTML form and submitting its named fields. These commands are templates: replace the example paths and field names with those from your router page.
- Fetch the page and save its cookies:
curl -c cookies.txt -s http://ROUTER/PAGE -o page.html
Use the router’s actual address and page path. If access requires logging in first, authenticate using the router’s own login flow and retain the resulting session cookies. - Inspect the form in
page.html: find the form’sactionandmethod, the checkbox input’snameandvalue, any hidden inputs, and the submit button’s name and value. The action tells you where to send the request; the method tells you whether it uses GET or POST. - For a URL-encoded POST, send the fields and cookies:
curl -b cookies.txt -c cookies.txt --data 'CHECKBOX_NAME=CHECKBOX_VALUE&SUBMIT_NAME=SUBMIT_VALUE&HIDDEN_NAME=HIDDEN_VALUE' http://ROUTER/FORM_ACTION
Replace the example field pairs with the required values from the form. Include only fields the router expects; hidden inputs may carry state or security tokens. - Check the result: examine the response, then fetch the settings page again using the same cookie jar to see whether the checkbox is now enabled. If the router redirects after saving, inspect the response first; use
-Lto follow redirects only when that fits the router’s workflow.
What a checkbox sends
A checked checkbox normally contributes its exact name=value pair to a form submission. For example, markup such as <input type="checkbox" name="enabled" value="1"> would submit enabled=1 when checked. An unchecked checkbox normally contributes no pair at all. Don’t guess a value or send one for an unchecked box unless the router’s markup or observed browser request shows that behavior.
Field names and values are case-sensitive in practice: copy them as written. A checkbox’s visible label is not necessarily the parameter name or value.
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Match the form’s encoding
For ordinary URL-encoded form submissions, curl’s --data option sends the POST body. Values with spaces or reserved characters need proper encoding. The curl project warns that data must be encoded before it is sent; use --data-urlencode instead of assembling encoded values by hand. See The Art of Scripting HTTP Requests Using curl.
If the form declares enctype="multipart/form-data", use curl’s --form option for the fields instead. Do not choose multipart or URL encoding by guesswork; follow the form’s declaration and request.
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Preserve login and form state
The cookie jar options in the examples serve different parts of the exchange: -c cookies.txt saves cookies from a response, and -b cookies.txt sends saved cookies with a request. Use the same jar for the page retrieval and the update so the router can associate the POST with your session.
Include required hidden inputs, submit-button parameters, and any anti-CSRF or state token in the form. The login endpoint, token names, and authentication method depend on the router and firmware, so there is no universal command that can supply them without inspecting the target page.
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When the checkbox uses JavaScript
Some router pages update a setting through JavaScript rather than submitting the visible HTML form. In that case, open the browser’s developer tools, inspect the network request triggered by checking the box, and reproduce that request: its URL, HTTP method, headers, body, cookies, and tokens. A simple --data POST may do nothing if the router expects an XHR request to a different endpoint, a JSON body, or a dynamically generated token.
Why a curl request may not change the setting
- Wrong endpoint or method: match the form’s action and its GET or POST method.
- Wrong checkbox parameter: copy the checkbox’s exact
nameandvalue, not its label. - Missing fields: include required hidden inputs and the submit control’s parameter.
- Missing or stale session: send the cookies from the authenticated page or login flow.
- Incorrect encoding: use
--data-urlencodefor values that need URL encoding, or--formwhen the form uses multipart encoding. - JavaScript-managed update: capture and reproduce the actual browser network request instead of guessing a form submission.
- Redirect or error response: inspect the response before deciding whether to follow a redirect with
-L.
An exact working command depends on the router model, firmware, page URL, authentication behavior, and the checkbox’s HTML or captured network request. Without those details, the field names and endpoint cannot be specified reliably.
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