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Operating System and Software Versions

Software versions may vary based on when you signed up for an account and what account type you possess. However, these are the default versions for software installed on new accounts.

Default Software Versions for New Accounts

Software Version
Apache 2.4
cURL 7.58 +
FreeBSD 11.2
MySQL 5.6 and 5.7 available
pairSIM software Updated with the most recent software release
Perl 5.22
PHP 7.1
Ubuntu 18.04

FreeBSD and Ubuntu Servers

All new user servers at pair Networks run the FreeBSD or Ubuntu operating system.

UNIX operating systems have been proven stable and reliable through decades of enhancement and improvement. pair Networks uses the open-source FreeBSD and Ubuntu operating systems exclusively for all of our web hosting services. You can count on this added reliability, scalability, and security as a benefit to your site.

On the FreeBSD and Ubuntu sites, you can read more about the past, present, and future of these operating systems.

Apache Web Servers

We are currently using the Apache web server on all new user servers with the following modules installed:

Apache Modules

  • mod_actions
  • mod_alias
  • mod_asis
  • mod_authn_anon
  • mod_authn_dbm
  • mod_authn_default
  • mod_authn_file
  • mod_authz_dbm
  • mod_authz_default
  • mod_authz_groupfile
  • mod_authz_host
  • mod_authz_user
  • mod_auth_basic
  • mod_auth_digest
  • mod_autoindex
  • mod_cband
  • mod_cgi
  • mod_deflate
  • mod_dir
  • mod_env
  • mod_expires
  • mod_headers
  • mod_http2
  • mod_imagemap
  • mod_include
  • mod_log_config
  • mod_logio
  • mod_mime
  • mod_negotiation
  • mod_php
  • mod_proxy
  • mod_proxy_http
  • mod_rewrite
  • mod_setenvif
  • mod_status
  • mod_unique_id
  • mod_userdir
  • mod_usertrack


Secure server and commerce services (SSL) are provided by the mod_SSL extension with our standard Apache configuration. This provides complete compatibility with our standard hosting services while ensuring the best possible performance and reliability.


Database services are provided by the famous open-source MySQL software. Available with our Advanced and higher level accounts, MySQL provides robust, high-performance SQL databases.


PHP is a powerful, server-side scripting language that can be used to extend the functionality of your pages in many ways. It is available for all accounts and is activated by naming the files that use it with the extension .php.

We are currently using PHP7 on new accounts.

Updated on December 21, 2018

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