• CPU Intel Pentium II or higher;
• RAM 1GB;
• HDD 200MB for temporary files and 150MB for program installation.

1. OS from the following list:

32-bit OS:

• Red Hat Enterprise Linux Server 6.2
• Fedora 16
• CentOS 5.7, 6.2
• SUSE Linux Enterprise Server 11 SP1
• Novell Open Enterprise Server 2 SP3
• openSUSE Linux 12.1
• Debian GNU/Linux 6.0.4 Squeeze
• Mandriva Enterprise Server 5.2
• Ubuntu 10.04, 12.04 LTS
• FreeBSD 8.2, 9.0.

64-bit OS:

• Red Hat Enterprise Linux Server 6.2, 7.1
• Red Hat Enterprise Linux Server 7.2 (with restrictions)
• Fedora 16
• CentOS 5.7, 6.2, 7.1
• CentOS 7.2 (with restrictions)
• SUSE Linux Enterprise Server 11 SP1
• Novell Open Enterprise Server 2 SP3
• openSUSE Linux 12.1
• Debian GNU/Linux 6.0.4 Squeeze
• Ubuntu 10.04, 12.04 LTS
• FreeBSD 8.2, 9.0

2. Compatible proxy servers:

• Squid 3.x
• Other proxy servers with ICAP support 

3. Perl language interpreter version 5.0 or above (www.perl.org).

4. Glibc library version 2.2.x or above (for Linux distributives).