User Manual Part 4

LaCie Wireless Space • DESIGN BY NEIL POULTON Glossary
User Manual page 94
Dynamic Port Forwarding - Allows applications to use SOCKS serv-
ers on local ports for network communication and Internet access.
This can be very convenient as it will avoid having to configure port
forwarding each time an application is used. The SOCKS is config-
ured on a server to route traffic while the application, such as a web
browser, is assigned a SOCKS in its preferences.
External Port - This port deals with requests outside the LAN, work-
ing with the NAT (network address translation) to convert external
IP addresses and port numbers to addresses that will be accepted
inside the network.
Firewall - One or more programs that act in concert with the gate-
way server to protect the computers and systems within a network.
Frame - A frame comprises all the data that is sent between network
points, including the addressing and network protocol information.
FTP (File Transfer Protocol) - A protocol used to transfer and ex-
change files over networks that use TCP/IP. With FTP, one person
can copy files into a folder within an FTP server for others to access.
Permissions are generally set so that anyone seeking to access the
files must enter a username and password.
FTP Server - A server that acts as the “host” for FTP transfers and
exchanges. A server, such as the Wireless Space, can enable FTP
access to files stored on its volume(s). The Wireless Space can
act as an FTP server, allowing the user, or friends and family, to
access its files or volumes by Internet hyperlinks. The base ad-
dresses are: ftp://[IP address], such as ftp://192.168.15.24; and
ftp://<username>:<password>@<ip or machine name>.
Gateway - See Network Gateway
HTTP (Hypertext Transfer Protocol) – The most common protocol
for the World Wide Web (the “www” in web addresses). HTTP is a
command that aids in defining the messaging for Web servers and
browsing, initiating the request to a particular address.
HTTPS (Hypertext Transfer Protocol Secure) – A secure level of HTTP
that uses SSL protocol for encryption and identification. Very often
seen with online financial websites or when making a purchase on
the Internet.
HTTPS Certificate - A digital certificate verifies the identity of a web
site or user. When a user logs onto the site, the browser will auto-
matically accept the certificate and indicate that the site is secure
(often graphically represented by a lock). HTTPS certificates may be
purchased and/or generated from many online vendors.
ICMP (Internet Control Message Protocol) – Another level of address
communication, along with TCP and UDP. However, this level is
generally not used to send and receive messages between servers or
computers. ICMP is implemented mostly for error messages, such as
a Web site being unavailable, or the popular ping feature used to
search for other IP addresses on a network.
Inotify - Inotify is used to automatically update directory views, re-
load configuration files, log changes, backup, synchronize, and up-
load. For example, it can initiate an update of a UPnP database.
Internal Port - This port deals with requests inside the LAN, such as
accessing files or sending emails.
Internet Provider - Broadband Internet service is available with a
cable modem provided by the local cable provider. The cable mo-
dem is linked to the computer via an Ethernet cable.
IP Address (Internet Protocol) - Each computer must have at least
one unique identity to engage in a form of network communication.
The IP address has multiple layers that allow a computer to send
and receive data, whether looking for web sites on the Internet from
home or sending e-mail to a colleague at work.
IPv4 - The most common form of network addressing used today, IPv4
is 32-bit. The format is easily recognizable as xxx.xxx.xxx.xxx, where
each “x” only represents the maximum digits in each field between
periods. An IPv4 address can be 192.168.1.1 or 84.22.291.652.
The maximum number of combinations reaches well over four bil-
lion. Even so, due to a world that has become dependent on Internet
communication, IPv4 addressing is becoming difficult to maintain.
IPv6 - To combat the seeming inevitability of IPv4 addressing reach-
ing its worldwide limit, IPv6 now offers much larger 128-bit address-
ing. Examples of the longer length are often seen as xxxx:xxxx:xxx:xxx
x:xxx:xxxx:xxxx:xxxx, where “x” can be a letter or a number. However,
it is not necessary to use four digits in all eight fields and the address
can be truncated when heavily populated with zeros. IPv6 is flexible
in understanding the address even when cutting back on leading
zero digits or using a double colon to remove them altogether. The
address below is an example of the same network identity in all its
permutations:
2001:0f34:0000:0000:0000:0000:2002:04fe
2001:f34:000:000:000:000:2002:4fe
2001:f34:00:00:00:00:2002:4fe
2001:f34:0:0:0:0:2002:4fe
2001:f34::2002:4fe
Note that the double colons can be used to replace whole fields that
contain only zeros.
ISP (Internet Service Provider) - The service that has installed a cable
or DSL modem in a home or business for access to the Internet.