URL Rewrite: Shortname to FQDN

One common issue I’ve seen with doing HTTPS is the short name for a server. Unless you get the correct certificate, if a user goes to the short name a server (https://server1 in stead of https://server1.contoso.com), the certificate will come as invalid. There’s a quick fix for this using IIS URL Rewrite. URL Rewrite can also be used to direct users to the HTTPS site, instead of using HTTP.

First you need to install URL Rewrite. For new versions of IIS (Server 2012 R2 and higher), that means using the Web Platfrom Installer. Just search for URL Rewrite.

Once the plugin is installed, add a new rule, and select blank rule. Give your rule a name, and expand the Match URL box. In “Match URL”, supply “^(.)$” as the pattern.

Now, we need to create a new condition. Expand the Condition box and click add. Change the “Condition input” to {HTTP_HOST} and “Check if input string” to “Does Not Match the Pattern”. Then, fill in the pattern box per the screenshot.

I have a 2-part domain name. If you have more than two parts, it would follow the same pattern. For example, nyc.contoso.com becomes “^.*\.nyc\.contoso\.com$”.

Finally, we need to tell IIS what to do. Expand the Action section, and fill it in like this:

That’s it, you’re all set. Apply the rule and test it out.

If you’d rather do this by modifying the web.config file, here’s the XML:

<rewrite>
<rules>
<rule name=”Redirect Shortname to FQDN” stopProcessing=”true”>
<match url=”^(.*)$” />
<conditions>
<add input=”{HTTP_HOST}” pattern=”^.*\.contoso\.com$” negate=”true” />
</conditions>
<action type=”Redirect” url=”https://{HTTP_HOST}.contoso.com/{R:1}” />
</rule>
</rules>
</rewrite>

Disclaimer

All content provided on this blog is for information purposes only. Windows Management Experts, Inc makes no representation as to accuracy or completeness of any information on this site. Windows Management Experts, Inc will not be liable for any errors or omission in this information nor for the availability of this information. It is highly recommended that you consult one of our technical consultants, should you need any further assistance.

Share:

Facebook
Twitter
LinkedIn

Contact Us

=
On Key

More Posts

WME Cybersecurity Briefings No. 004
Cyber Security

WME Security Briefing 11 April 2024

Mispadu Trojan Exploits Windows Vulnerability to Target Financial Data Overview The Mispadu banking trojan has intensified its operations as it’s exploiting an already patched Windows SmartScreen flaw. Since its initial identification in 2019, Mispadu has primarily preyed on

Read More »
WME Cybersecurity Briefings No. 003
Cyber Security

WME Security Briefing 29 March 2024

Russian hackers escalating their cyber warfare, deploying TinyTurla-NG to breach European NGOs. Cisco Talos reveals a targeted attack against organizations advocating democracy and supporting Ukraine. With their sophisticated methods, these cyber attackers are bypassing antivirus defenses

Read More »
Be assured of everything

Get WME Services

Stay ahead of the competition with our Professional IT offerings.

=