When a person is trying to access a website but the website is not allowing them to access that webpage, the website will show the 403 error. The 403 Forbidden HTTP status code indicates that the client was able to communicate with the server, but the server doesn’t let the user access what was requested.
If you are having this problem with some website, and you are not the owner of that website, then you have to consult this problem with the website owner. If you are owner, then you have to check something in order to get rid of the problem
You first need to confirm if you have encountered a “No directory browsing” problem. You can see this if the URL ends in a slash ‘/’ rather than the name of a specific Web page (e.g. .htm or .html). If this is your problem, then you have no option but to access individual Web pages for that Web site directly.
It is possible that there should be some content in the directory, but there is none there yet. For example if your ISP offers a ‘Home Page’ then you need to provide some content – usually HTML files – for the Home Page directory that your ISP assigns to you. Until the content is there, anyone trying to access your Home Page could encounter a 403 error. The solution is to upload the missing content – directly yourself or by providing it to your ISP. Once the content is in the directory, it also needs to be authorized for public access via the Internet. Your ISP should do this as a matter of course – if they do not, then they have missed a no-brainer step.
If your entire Web site is actually secured in some way (is not open at all to casual Internet users), then a 401 – Not authorized message could be expected. It is possible, but unlikely, that your Web server issues a 403 message instead.