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Thanks for the tip. Have enabled http-sub-status in IIS logging properties and it turns out that the error is a 403.14 error:<br />
<br />
2008-05-27 07:24:47 212.188.171.51 HEAD / 80 212.188.171.54 403 14 64 0 19<br />
<br />
What I can't understand is that the site is receieving HTTPS posts successfully, there should not be any HTTP entries in the logs. Does IIS do something automatically like an HTTP keep alive (have disabled this in website properties)?<br />
<br />
Any help appreciated.
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Thanks for the tip. Have enabled http-sub-status in IIS logging properties and it turns out that the error is a 403.14 error:

2008-05-27 07:24:47 212.188.171.51 HEAD / 80 212.188.171.54 403 14 64 0 19

What I can't understand is that the site is receieving HTTPS posts successfully, there should not be any HTTP entries in the logs. Does IIS do something automatically like an HTTP keep alive (have disabled this in website properties)?

Any help appreciated.

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<div class="content wysiwyg-content">
I have created an HTTPS based site in IIS 6.0 which accepts HTTPS posts using a CGI file. For the last month or so since data has been sent to this site I have had reports from clients saying about 'connection timeouts' and 'connections freezing'. <br />
<br />
The firewall in front of the server will only accept HTTPS connections. After checking the logs there seems to be a number of port 443 connections to the CGI file that have been successful. But a number of entries listed are as follows:<br />
<br />
2008-05-23 07:00:01 212.188.x.x HEAD / 80 212.188.x.x 403 64 0 19<br />
<br />
Can anyone help with these entries or help troubleshooting the lost connections to the site.<br />
<br />
Regards,<br />
RM<br />
<a href="https://filedb.experts-exchange.com/incoming/2008/05_w21/27480/IIS.txt" target="_blank" class="file-inline" title="IIS 6.0 log file (21 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>IIS.txt</a>
</div>
</div>


IIS.txt

I have created an HTTPS based site in IIS 6.0 which accepts HTTPS posts using a CGI file. For the last month or so since data has been sent to this site I have had reports from clients saying about 'connection timeouts' and 'connections freezing'. 

The firewall in front of the server will only accept HTTPS connections. After checking the logs there seems to be a number of port 443 connections to the CGI file that have been successful. But a number of entries listed are as follows:

2008-05-23 07:00:01 212.188.x.x HEAD / 80 212.188.x.x 403 64 0 19

Can anyone help with these entries or help troubleshooting the lost connections to the site.

Regards,
RM

HTTPS post site creating 403 errors in IIS 6.0 logs

IIS is Internet Information Services, the web server included with Windows Server operating systems. All current versions are built on a modular architecture; modules can be added or removed individually so that those required for specific functionality are installed. The full installation of IIS includes HTTP, security, content, compression, caching, logging and diagnostics.

Microsoft IIS Web Server

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Transfer Protocol (HTTP) within a connection encrypted by Transport Layer Security (TLS) or its predecessor, Secure Sockets Layer (SSL). The main motivation for HTTPS is authentication of the visited website and to protect the privacy and integrity of the exchanged data. HTTPS is widely used for protecting page authenticity on all types of websites, securing accounts and keeping user communications, identity and web browsing private.