License

ZeroShell is a Linux Live CD distribution using open source software. The license with which it is distributed is the GPL version 2. Consequently in the Download section, along with the ISO image of the LiveCD, Javascript, Bash script and HTML created by the author of ZeroShell are also available.

For obvious organizational issues, it is not possible for me to offer the source code of all the software comprising Zeroshell for download. A list of these components is, however, attached below. I cannot thank the respective authors enough for this open source software, created and maintained at no cost.

I would also like to thank www.dyndns.com through which Zeroshell implements a dynamic DNS system to guarantee traceability even with dynamic IPs.

Finally, I would like to express my gratitude to the National Institute of Nuclear Physics (INFN), where I am a system administrator in the Lecce Section, for the high degree of professionalism of the members of the Computing and Network Services who allowed me to come into contact with a high level networking and data processing systems.

Open source software used in Zeroshell

Software	Purpose (limited to the use in ZeroShell)
linux	Linux Kernel
httpd	Administration web interface
krb5	Kerberos 5 Authentication Server
openldap	LDAP Server
ypserv	NIS Server (YP)
openssl	SSL/TLS Tunnel and CA management
freeradius	RADIUS server + EAP-TLS and PEAP (802.1x)
iptables	Firewall Packet Filter and Stateful Packet Inspection (SPI), NAT and Port Forwarding (PAT)
openvpn	lan-to-lan ethernet VPN with VLAN
IPP2P	Peer-to-peer file sharing traffic control
bind	DNS Server
Stig Venaas'LDAP SDB	LDAP backend for bind DNS using dNSZone schema
dhcp	DHCP Server
rp-pppoe	PPPoE Client for ADSL connections
vconfig	Tagged VLAN 802.1Q
bridge-utils	Bridging 802.1d with STP
ppp	Point to point IP connections used for the PPPoE and PPTP protocol
quagga	RIP protocol version 2 used for dynamic routing management
ntp	NTP client and server for system clock synchronization
sysklogd	Syslog server for the acquisition and cataloguing of local and remote logs via syslog protocol
arpwatch	Monitoring of ARP events such as duplication of IP addresses, flip flops and other faults
libpcap	Packet Capture libraries used by arpwatch
lzo	Real-time compression in lan-to-lan VPNs
wget	To guarantee automatic updating with the patches found on http://www.zeroshell.net/updates
pciutils	Recognition of the brand and model of the Ethernet cards on PCI bus
ethtool	Recognition of the status of the physical link on Ethernet connections
e2fsprogs	Management of ext2 and ext3 filesystems
reiserfsprogs	Management of ReiserFS filesystems
dosfstools	Management of FAT and FAT32 (DOS and Windows) filesystems
parted	Partition management. In particular partprobe allows viewing new partitions without rebooting
udev	Automatic management of devfs for hotplugs of USB disks
sudo	Increases security by running Apache as an unprivileged process and increasing privileges only if strictly necessary
Linux-PAM	PAM (Pluggable Authentication Modules)
ClamAV	Antivirus for the web pages
HAVP	HTTP Proxy with Antivirus and URL blacklist support
Wireless Tools	Management of the Wireless interfaces (iwconfig, iwpriv, ...)
MadWIFI	Kernel modules for Wi-Fi Atheros chipsets
WPA-Supplicant	WPA/WPA2 Authentication (client)
HostAP daemon	WPA/WPA2 Authentication (Acces Point)

All software has been compiled using gcc from GNU.