htaccess in your server and placing a specific line to make the URL redirection. This method consists in editing a file called. In this case, the PHP file would look like: Method 4: Redirect URL using. We can also use a more complete PHP file, specifying that this is a 301 redirect (permanent). This way, whenever we access this specific PHP file, the user will be redirected to our destination site. Now, by this method, you need FTP access to edit files in your server as well. This is the old page that will redirect to the new one įor example, here’s how the HTML will look like: Simply edit the specific source HTML file, and add this line to your section. You just need access to edit the HTML files of the source URL you wish to redirect. This is the solution about how to redirect a URL when you have FTP (or similar) access to your site. Ĭlick Add, and the URL redirect is done! The source URL will redirect to another URL. Under Redirects to, place the details of the destination URL. Firstly, we recommend keeping the field Type as Permanent (301).Īfterward, select the domain name you wish to redirect to outside. Then, we will explain how to configure the URL redirect in this screen. Scroll down and find the Domains – Redirects icon, as shown in the photo. This is maybe the easiest and fastest method.įirstly, access your cPanel control panel. Troy Hunt has a great piece on this topic.By this method, you need access to your cPanel control panel.(One of the examples on how not to do it here is alwmost identical to how you did it in your question.) OWASP cheat sheet on unvalidated redirects.Inform the user of the problem or just redirect to your index page. you will need to filter out newlines or just URL encode the URL. If you want your code to be safe on old PHP versions, HTTP redirects usually have the response status 301 or 302 and provide the redirection URL in the Location header. $referer = isset($headers) ? parse_url($headers, PHP_HOST) : "" Here is some example code: $headers = apache_request_headers() This might run into some issues if you serve your site over both HTTP and HTTPS, since if you link from a HTTP page to an HTTPS page the referer header will not be sent. If you only want the redirect links to work from within your own site, you could check the HTTP referer heading of the request. For instance if they are on the form you could accept only the pagied to redirect to and verify that it is in fact numeric. Depending on what your URLs look like, you could validate URLs for your own site. This will be tedious if there are many pages you want to be able to redirect to. $redirect = isset($allowed) ? $allowed : "index.php" What to do instead Whitelisting or validationĪs so often, the solution is to whitelist. Header injectionĪs already stated by Steffen Ullrich in his answer to this question and me in this answer to another question, on PHP versions older than 5.1.2 this could be used for header injection. It would be so easy to serve an "incorrect password, try again" type of page after the login. If this is done after the user logins, as you hint at in the question, it is even more dangerous since actually being on your page entering the credentials strengthens the users belief that he is actually on your site. For example, such as directing requests for to /blog. This is useful for those looking to redirect requests from their main domain to another directory under that domain. Do you want users clicking links to your site and ending up on illegal or NSFW or NSFL content? Create a PHP redirect Overview There are several ways to redirect a URL. You could try to claim this is not your problem, since it is technically not your site spreading it. A site spreading malware by drive by downloads.On a site looking exactly like yours, asking for username and password.Now a user clicking what looks like an ordinary safe link to your site might end up anywhere: The malicious URL could be obfuscated to avoid detection by the user by URL encoding all character so you get a string like %68%74%74%70%3A%2F%2F%6D%61%6C%69%63%69%6F%75%73%2E%63%6F%6D. Phishing and spreading malwareĪn attacker could craft an URL to redirect to any page they want, and then spread it everywhere: Without proper validation, attackers can redirect victims to phishing or malware sites, or use forwards to access unauthorized pages. Web applications frequently redirect and forward users to other pages and websites, and use untrusted data to determine the destination pages. In fact, this is the last one of OWASP Top 10: This is not safe, and should not be done.
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