Generally. the HTTP error 403 - Forbidden means that access to the file/folder you are trying to open has been denied, either on purpose or due to a misconfiguration.
If you suspect that only your access is blocked, try a web proxy to hide your identity.
If you are the site administrator check the webserver's error log when troubleshooting. Most web hosting control panels give access to such a tool. In DirectAdmin, it is called Error log. Check the manual for your webserver if you don't have a control panel.
In the error log you will see a list of the last error messages generated by your website. In this list you will find detailed information about each error including: the date and time of the error, some information about the client receiving the error, description of the error and information about which folder or file on your account is generating the error.Here are some examples of the most common errors and how to fix them:
deny from 127.0.0.45
- this rule denies access from a particular IP, in this case 127.0.0.45
deny from all
- this rule denies access from all IPs
If you find such a line you should delete it and save the change. After that the client with this IP should be able to access the files in the folder and will not receive the "403 forbidden" error.
[Thu Apr 19 02:13:24 2007] [error] [client 127.0.0.76] Directory index forbidden by rule: /home/user/public_html/
Such error message will be displayed when a user tries to open a directory which has no index file and at the same time the Indexes option for this directory is turned off. In order to avoid this from happening, you should make sure that the .htaccess file within the directory which displays this error does not contain a line like the one below: