topic Captive Portal with custom images in General Topics

Captive Portal with custom images

higawajj — Sun, 23 May 2021 10:48:04 GMT

Hello everyone,

I'm trying to implement the custom Captive Portal Response Page with custom images in it.

Is there a way to upload my own images to the Palo Alto to use them in the Captive Portal? I did found the info about using the custom images from outside web or FTP resources via URL tag, but it doesn't fit the requirements of my customer. So I need to use the own PA's storage for custom images.

I checked the HTML code of the Captive Portal page and found this:

Default logo is being downloaded from some 'images' folder. Where can I find this folder or upload my own image to this folder? Unfortunately, I didn't found any information about accessing PA Linux shell or accessing this folder.

Also, I have one more question about custom Captive Portal. Inside the HTML Captive Portal code I found that login and password text boxes are being displayed via default variable <pan_form/>. I need to change the names of the boxes (i.e. "name" instead of "login"). How can I access to the code of that variable to change the box naming? Or maybe someone has the source code of that variable? If so, could you please provide me this code?

Thanks in advance.

Re: Captive Portal with custom images

Remo — Sun, 23 May 2021 13:06:36 GMT

Hi @higawajj

It isn't possible to upload images to the firewall and use them on the captive portal login website. What you can do is to use the image you need (but it cannot be too big as there is a size limit of the custom captive portal html) as base64 directly in an img tag as src or also in css.

--> https://www.w3docs.com/snippets/html/how-to-display-base64-images-in-html.html

With your second question, jquery is your friend. With a framework like that it is possible to change the html at runtime. Also here there is something you should be careful: with jquery you could change any html property you want, but changing the name of the logintextbox could break the login completely. With that said, why do you need to change these textbox-names?

Re: Captive Portal with custom images

J.Dhling — Tue, 17 Mar 2026 09:40:21 GMT

Thanks! Neat trick with the base64 img tag!