Internal Domain Name System for Company

947 Words4 Pages
Internal Domain Name System for Company Alpha Introduction The DNS is a vital Internet component providing mechanisms for resolving host names into IP addresses and vice versa. In addition, DNS supports other Internet directories concerning DNS name servers and mail exchangers among others (Garfinkel & Spafford, 1997). Despite being a universally accepted and widely used system, insecure protocols and lack of authentication among other factors within the DNS threaten proper functionality of the DNS. Moreover, the accuracy of the information contained within the DNS is vital to many aspects of IP based communications. Domain Model for the Organization The domain appropriate for this organization is the Berkeley Internet Name Domain (BIND). This domain name is selected since it compatible with most operating systems including UNIX; it is also used by most Internet Service Providers (Stevens, 1990). In addition, BIND is recommended for the firm since its configuration files are easier to maintain than other server DNSs such as Sendmail (Terry, Painter, Riggle, & Zhou, 1984). Using this DNS, cache-only name servers are easily placed strategically within the internal network to remove unwanted traffic and expensive WAN links. Moreover, BIND supports DNS SEC, TSIG IPv4 among other DNS protocol enhancements. Given the popularity of BIND, it is often targeted by hackers. Therefore, limiting zone transfers to slave name servers and limiting transfer in the zone can reduce the
Open Document