HTTP Error 404. The requested resource is not found

TonyJK 881

Hi,

We just set up a new IIS Server on a Windows 2016 Server and with a DigiCert SSL Certificate. The Web Server is a Workgroup Server and not domain member.

We get response for both Host Name and Server Name
"HTTP Error 404. The requested resource is not found".

Is there any suggestion ?

Thanks

3 answers

Bruce Zhang-MSFT 3,751 Reputation points

2021-08-19T02:25:50.383+00:00

Hi @TonyJK ,

Can you explain the relationship between servername and servername.company.com and what them are?

According to my understanding, servername is IP of server and servername.company.com is the host name of site on server. Is it right?

If so, did you add "127.0.0.1 servername.company.com" in hosts file of windows server? You also need to add "xxx.xxx.xxx servername.company.com"(xxx.xxx.xxx is the IP of windows server) in hosts file of client machine.

If not, check log of site to see if server receive the request. If it received the request, check the substatus code and refer to this docs. You will know what cause 404.

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Best regards,
Bruce Zhang
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TonyJK 881 Reputation points

2021-08-19T05:24:15.37+00:00

Dear Bruce,

Thanks for your advice. Yes, you are right for Server Name and Host Name.

II have tried to ping both ServerName and HostName. Address for both of them can be resolved by DNS.

I also find that the IIS Log File is set up as "Per Site". Does it mean that there is only 1 Log file ? Should I search for 404 in the Log file ?

Thanks

Bruce Zhang-MSFT 3,751 Reputation points

2021-08-19T08:32:07.003+00:00

Hi @TonyJK ,

Each site has its log file. In this folder:%SystemDrive%\inetpub\logs\LogFiles, IIS will generate folder named as WSVCx(x is the ID of site). Then log files are put under this folder. Find the site you want to access and check its log file.

TonyJK 881 Reputation points

2021-08-19T09:19:11.743+00:00

Dear Bruce,

My colleague has a look of the problem. We have RDP to the Web Server.

We find that

https://localhost - Works

https://servername - Error (I am wrong as when I click the Advanced button for Certificate Error, I get the same HTTP 404 error)

https://hostname - Error

I think the question will be is there any reason IIS works for localhost but not Server Name / Host Name.

Besides, there a number of applications in the Default Site and there is only 1 log folder - W3SVC1. Is it correct ?

Thanks again

Bruce Zhang-MSFT 3,751 Reputation points

2021-08-20T07:55:41.723+00:00

Hi @TonyJK ,

So you mean that both IP and hostname can use ping command to receive data, but fail to access through URL?

What's the sub status code of 404 error in log file? This is import. I think there is another possibility that the firewall is blocking access to this port. Check your firewall to make sure that inbound port rules are created for the ports you are accessing.

Besides, there a number of applications in the Default Site and there is only 1 log folder - W3SVC1. Is it correct ?

Yes, it is corrext. Though there are many application, both of them are published under a website - Default website. They can be accessed by Alias(when you add application, alias is asked to set in diag) such as http://hostname/xxxx. But this reminds me of a possibility. How do you deploy these applications in the default site? Does the iisstart.htm still exist? If you don't mind, please show the screenshot of 404 error page.

TonyJK 881 Reputation points

2021-08-21T05:19:35.807+00:00

Dear Bruce,

Thanks for your follow up. You are much appreciated.

I confirm

Ping for both IP and Hostname are OK

Firewall is not turned on

iistart.htm exists in the root

I am able to access iistart.htm for all cases if I use "http protocol" - localhost / IP Address / Server Name

For "https protocol", I can only access iistart.htm for localhost but not for IP address or Server Name

Screen print is attached

Bruce Zhang-MSFT 3,751 Reputation points

2021-08-23T08:05:21.14+00:00

Hi @TonyJK ,

It is an issue of DNS. Contact your team's DNS administrator to set host name mapped to server IP. The request cannot forward to server IP by your team's DNS and doesn't register in Global DNS. No server receive this request.

TonyJK 881 Reputation points

2021-08-23T12:01:49.81+00:00

Dear Bruce,

Thanks for your advice. We have restarted the IIS service.

Then we find that we also cannot connect to localhost / IP and Server Name via HTTPS Protocol. We also check and confirm that the DNS Entry is valid.

On the other hand, we find that when we connect via HTTP Protocol, all localhost / IP and ServerName give us the iistart.htm page. A fellow suggests that it may be SSL Binding problem. Is it possible ?

Thanks again.

Bruce Zhang-MSFT 3,751 Reputation points

2021-08-24T01:54:39.84+00:00

Hi @TonyJK ,

It is not related to SSL binding. iisstart.htm is the default page when you access the server in port 80. If you check the binding of default web site, you will find it binds to 80 port. Create another website and bind to other port, you can access it through localhost:port.
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ShineNaungNaung 5 Reputation points

2023-06-10T05:41:43.0666667+00:00

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My smart acount m 0 Reputation points

2023-06-16T20:21:22.3366667+00:00

This microsoft is very important softaware acount if i don't have this aps active my alll activities lost plz let's me knowafter you have give me all solution thanku
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