HTTP Error 405 Method not allowed
The HTTP protocol defines methods to indicate the action to be performed on the Web server for the particular URL resource identified by the client (e.g. your Web browser or our CheckUpDown robot). The methods are as follows:
All Web servers can be configured to allow or disallow any method. For example if a Web server is 'read-only' (no client can modify URL resources on the Web server), then it could be set up to disallow the PUT and DELETE methods. Similarly if there is no user input (all the Web pages are static), then the POST method could be disallowed. So 405 errors can arise because the Web server is not configured to take data from the client at all. They can also arise if the client does not have sufficient authority to the particular URL resource identified on the request. (Last updated: March 2012).
Fixing 405 errors - general
405 errors often arise with the POST method. You may be trying to introduce some kind of input form on the Web site, but not all ISPs allow the POST method necessary to process the form.
All 405 errors can be traced to configuration of the Web server and security governing access to the content of the Web site, so should easily be explained by your ISP.
Fixing 405 errors - CheckUpDown
Our service monitors your site for HTTP errors like 405. This error should simply never occur on your CheckUpDown account. If it does, it typically indicates defective programming of our systems or of the Web server which manages the site. We use the GET method only, which all Web servers should allow (otherwise no-one would ever be able to see the Web site).
Please contact us (email preferred) whenever you encounter 405 errors - there is nothing you can do to sort them out. We then have to liaise with your ISP and the vendor of the Web server software to agree the exact reason for the error.
405 errors in the HTTP cycle
Any client (e.g. your Web browser or our CheckUpDown robot) goes through the following cycle when it communicates with the Web server:(1) Obtain an IP address from the IP name of the site (the site URL without the leading 'http://'). This lookup (conversion of IP name to IP address) is provided by domain name servers (DNSs).
This error occurs in the final step above when the client receives an HTTP status code that it recognises as '405'.
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