Apache HTTP Server Version 2.2

Apache > HTTP Server > Documentation > Version 2.2 > Modules

# Apache MPM winnt

Available Languages: de | en | ja

Description: | This Multi-Processing Module is optimized for Windows NT.
Status: | MPM
Module Identifier: | mpm_winnt_module
Source File: | mpm_winnt.c

### Summary

This Multi-Processing Module (MPM) is the default for the Windows NT operating systems. It uses a single control process which launches a single child process which in turn creates threads to handle requests

### Directives

## Win32DisableAcceptEx Directive

Description: | Use accept() rather than AcceptEx() to accept network connections
Syntax: | `Win32DisableAcceptEx`
Default: | `AcceptEx() is enabled by default. Use this directive to disable use of AcceptEx()`
Context: | server config
Status: | MPM
Module: | mpm_winnt
Compatibility: | Available in Version 2.0.49 and later

`AcceptEx()` is a Microsoft WinSock v2 API that provides some performance improvements over the use of the BSD style `accept()` API in certain circumstances. Some popular Windows products, typically virus scanning or virtual private network packages, have bugs that interfere with the proper operation of `AcceptEx()`. If you encounter an error condition like:

`[error] (730038)An operation was attempted on something that is not a socket.: winnt_accept: AcceptEx failed. Attempting to recover.`

you should use this directive to disable the use of `AcceptEx()`.

Available Languages: de | en | ja