Appendix B. The `interfaces` File
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# Appendix B. The `interfaces` File

Abstract

The `interfaces` file is retained for compatibility with Sybase environments. It is recommended that new users use the `freetds.conf` format instead.

## Where it came from

Under Sybase OpenClient there is a file called `interfaces` that defines servers available to the software. FreeTDS inherited this file structure with minor alterations. The `interfaces` remains supported for backward compatibility, and for those running in a mixed FreeTDS/Sybase environment.

The `interfaces` is not read by FreeTDS unless it does not find `freetds.conf`. Note also that make install will install a skeleton `freetds.conf`, which you'll have to remove if you want to use `interfaces` instead.

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