ColdFusion will run on any J2EE servlet engine that includes JRun, Tomcat, Resin, Jetty and others.
It will not run directly on a web server such as Apache or IIS (they are configured to send appropriate requests to the application server).
As Steve points out, there are alternative CFML engines in Adobe CF - the two main Railo and OpenBD (both are Open Source with available commercial options), but they still need Tomcat / etc.
If you have a Windows + IIS server, you can consider BlueDragon.NET , which is commercial (not open source), but will connect directly to the IIS web server (there is no need for the J2EE servlet engine).
Is it easier than just rewriting the 70 lines of logic in the language / technology that you are already using will depend on what exactly this code does.
On the one hand, there are not so many 70 lines, and it is better to adhere to a single technology, but then again, Railo or OpenBD are quickly and easily configured and will not cost you any license fees.
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