cPanel
cPanel (control Panel) is a graphical web-based web-hosting control panel, designed to simplify administration of websites. cPanel handles aspects of website administration in its interface. The software, which is proprietary and distributed by cPanel, Inc., is designed for use by commercial web hosting services, so the company does not offer a reduced-cost personal use license; however, owners of non-profit organizations such as educational institutions and charities can request a license at a free or reduced cost. Reduced prices are frequently available from dedicated-server companies, who install it along with the operating system. cPanel runs on RPM-based Linux distributions including SUSE, Fedora, Mandriva, CentOS, Red Hat Enterprise Linux as well as FreeBSD. The company claims preliminary support for Debian, although this version has been in "beta" state for several years and is not supported. cPanel is commonly accessed on ports 2082 and 2083 (for an SSL version). Authentication is either via HTTP or web page login.

Domain Name
In computer networking, a domain name is a a name given to a collection of network devices that belong to a domain which is managed according to some common property of the members or within a common administrative boundary. In particular, the term is used to describe the regions of administrative authority within the Domain name system used for the Internet (cf. DNS zone).

Email
Electronic mail, often abbreviated to e-mail, email, or originally eMail, is a store-and-forward method of writing, sending, receiving and saving messages over electronic communication systems. The term "e-mail" (as a noun or verb) applies to the Internet e-mail system based on the Simple Mail Transfer Protocol, to network systems based on other protocols and to various mainframe, minicomputer, or intranet systems allowing users within one organization to send messages to each other in support of workgroup collaboration. Intranet systems may be based on proprietary protocols supported by a particular systems vendor, or on the same protocols used on public networks. E-mail is often used to deliver bulk unsolicited messages, or "spam", but filter programs exist which can automatically block, quarantine or delete some or most of these, depending on the situation.

SSL
Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), are cryptographic protocols that provide secure communications on the Internet for such things as web browsing, e-mail, Internet faxing, instant messaging and other data transfers. There are slight differences between SSL and TLS, but they are essentially the same. The TLS protocol allows applications to communicate across a network in a way designed to prevent eavesdropping, tampering, and message forgery. TLS provides endpoint authentication and communications privacy over the Internet using cryptography. Typically, only the server is authenticated (i.e., its identity is ensured) while the client remains unauthenticated; this means that the end user (whether an individual or an application, such as a Web browser) can be sure with whom it is communicating. The next level of security — in which both ends of the "conversation" are sure with whom they are communicating — is known as mutual authentication. Mutual authentication requires public key infrastructure (PKI) deployment to clients unless TLS-PSK or the Secure Remote Password (SRP) protocol are used, which provide strong mutual authentication without needing to deploy a PKI. TLS involves three basic phases: 1. Peer negotiation for algorithm support 2. Key exchange and authentication 3. Symmetric cipher encryption and message authentication During the first phase, the client and server negotiate cipher suites, which determine the ciphers to be used, the key exchange and authentication algorithms, as well as the message authentication codes (MACs). The key exchange and authentication algorithms are typically public key algorithms, or as in TLS-PSK preshared keys could be used. The message authentication codes are made up from cryptographic hash functions using the HMAC construction for TLS, and a non-standard pseudorandom function for SSL. Typical algorithms could be: * For key exchange: RSA, Diffie-Hellman, ECDH, SRP, PSK * For authentication: RSA, DSA, ECDSA * Symmetric ciphers: RC4, Triple DES, AES, IDEA, DES, or Camellia. In older versions of SSL, RC2 was also used. * For cryptographic hash function: HMAC-MD5 or HMAC-SHA are used for TLS, MD5 and SHA for SSL, while older versions of SSL also used MD2 and MD4.