When you click on the Monitoring and Reporting or Backup snap-in, you
receive the following error:
The page cannot be found
HTTP 400 – Bad Request
If “Show friendly HTTP error messages” is uncheck in IE, the error become:
Bad Request (Invalid Hostname)
SBS2003 Premium: 127.0.0.1 (loopback) is missing from the Default Web Site.
SBS2003 Standard: A host header is assinged to All Unassigned (Default)
<Typically ISA is installed and thus Default Website is bounded to the
internal IP only.>
Go to IIS, Default Web Site, Web Site tab, Advanced. Server should have the
internal IP on port 80 and 127.0.0.1 on port 80. If the loopback is
missing, click Add, and type 127.0.0.1 for the IP, 80 for the port, and do
NOT assign any host header to 127.0.0.1.
<ISA is not installed and thus Default Website is bounded to All
Go to IIS, Default Web Site, Web Site tab, Advanced. Verify the IP address
Default does not have a host header. Removed any host header assiged to
If you have to assign a host header to the default website, please add
127.0.0.1 with port 80 and NO host header to the default website.
NOTE: Monitoring and Reporting, and Backup snapin in Server Management
communicate with the IIS Default Website using 127.0.0.1. Make sure
127.0.0.1 port 80 is availalbe and no host header is assigned to 127.0.0.1.