In IE6, “res:// c://windows.system32.shdoclc.dll HTTP”_ 403.htm& http://.. (specific path) “is wrong. The reason is that my path in the background is “./admin/other directory”.

Where admin is in the root directory. In IE6, because “/” represents the root directory, another path will be added in front of the actual path.

Therefore, if the admin is already in the root directory and IE6, you only need to remove “/” and it can solve the problem.

This problem will lead to the following errors: 403 Forbidden, access forbidden, etc.

Reproduced in: https://www.cnblogs.com/gowhy/archive/2011/07/05/2097924.html