We are also a strong advocates of open-source ecosystem, and provides consultancy, implementation, and support services for the following open-source products:

• Web servers – apache, nginx, lighttpd
• Application firewall - modsecurity
• DNS servers – BIND
• Proxy / reverse proxy – varnish, squid
• Network security – OpenVPN, IPSec (OpenSwan), xl2tpd
• High-availability – LVS, Lustre, Heartbeat, Pacemaker, nbd, drbd
• CMS – Drupal, Plone, SilverStripe, Joomla
• Network monitoring – Zabbix, ZenOSS, Munit, Nagios, OpenNMS, Munin, Ganglia
• Email / messaging system – Postfix, Sendmail, qmail, exim, Dovecot, Courier, Zimbra
• Database – MySQL, Berkeley DB, PostgreSQL, SQLite, memcached (well...not exactly database, but close)
• Virtualization – Xen, OpenVZ, KVM
• Telephony - Asterisk, FreePBX

If you are looking for other open-source applications that is not listed here, please do not hesitate to contact us. We can probably work out some arrangement!