Bad Request (Invalid Hostname) when accessing via IP

Customer wanted to have a dedicated IP, but once I change the IP from the plesk control panel, I couldn’t get the website when accessed using IP. Instead, it was giving me the plesk control panel’s default page. Reason ? Default Website was having the IP as “All Unassigned”. Set that to the main IP address. But after that I was getting a new error.

What I could get was “Bad Request (Invalid Hostname)” in bold letters. Here is what I did to fix the same.

Start -> Run -> inetmgr -> Expand the (+) -> Websites -> Right click on the domain name -> Take Properties -> Website -> IP Address (make sure that it has the dedicated IP assigned there) and then click “Advanced”

Add/Edit Web Site Identification

IP Address : Choose the dedicated IP from drop down list
TCP/IP Port : 80
Host Header Value : Leave it blank (Important)

Leaving the Host Header Value should fix the issue and fetch the website when accessing it using the IP.

One website in Plesk is asking for user name and password. What is the solution

This is common issue, but solutions varies based on situations. It could be one or a combination of a solutions listed below. If you had to go through another solution to solve it, please add it over here for others.

• Permission issue was making the website to ask for the password. Run the Plesk permissions fix from the Plesk reconfigurator. It could help you 10% of the time
• If it is asking for username and password, right after you changed the password of the account, 80% of the cases, below command based solution would work.
  

  cd %plesk_bin%
  websrvmng –update-anon-password –domain-name=domainname.com

• Login to plesk, select the domain, click web directories. And there, select the the protection tab and click remove protection if enabled – Only 5% chances to have this solve your issue
• Try resetting the domain password from Plesk, with Additional Write/Modify permissions checked. This may sync the IUSR_username’s password and the Plesk/FTP password. If it didn’t move on to next option to manually synchronize it.
• Go to IIS > Web sites > domainname.com > Properties > Directory Security tab > Click on Edit button within “Authentication and access control” section > enter “password” in password filed > click OK.
  After that, Go to Users Management > find user IUSR_pleskusername > Right Click > set password > proceed > enter “password” > click OK. If this also didn’t fix, issue is much more serious and move on to next options
• Depending on the Plesk versions you use, Plesk group `psacln` should be allowed to access the server from the network. For that Go to, Administrative Tools > Security Settings > Local Polices > User Rights Assignment > Access this computer from the network
• Check whether there is any new FTP accounts added with the “Home directory” as httpdocs itself. If so please remove it and then change the password at Domain Setup and save it
• Check whether the plesk_username and IIS_pleskusername are added and has proper permissions for the DriveLetter:\Inetpub\vhosts\domainname.com as well as DriveLetter:\Inetpub\vhosts\domainname.com\httpdocs.

Okay those are my current solutions.