Host information Introduction A domain database contains names. These names generally refer to either machines part of the domain or sub-domain. This dialog allows you to define both. 11.. SSeettttiinngg IIPP nnuummbbeerrss ffoorr aa hhoosstt You can define up to 4 IP numbers per _D_N_S entry. There is four combo box edit fields. A help pop-up is available to help you select one available (not already used) IP number. You must have defined your IP ranges first using the IP allocation space menu of the main DNS configurator menu. 22.. SSeettttiinngg uupp aa ssuubb--ddoommaaiinn A sub-domain is a way to handle authority to another administration. Setting a sub-domain involves mostly telling where is the _D_N_Ss managing this sub-domain. This is a two steps process. You must first define which machines are managing the sub-domain and next, you must gives the IP number of those machines if they are part of the sub- domain. A _D_N_S of a domain need not be part of the domain it is managing. 22..11.. AAnn eexxaammppllee:: SSeettttiinngg tthhee ssuubb--ddoommaaiinn ssuubb..ffoooo..ccoomm Some facts first... +o This machine is the _D_N_S of foo.com. +o You want to create the sub-domain sub.foo.com. +o The primary _D_N_S of the sub-domain will be dns.sub.foo.com. +o The secondary _D_N_S of the sub-domain will be ftp.sub.foo.com. You do... +o Edit the record sub.foo.com (It is new). +o Under the section DNS advertising enter dns.sub.foo.com and ftp.sub.foo.com. +o Edit the record dns.sub.foo.com and set the IP number(s) of this machine. +o Repeat the operation for ftp.sub.foo.com. Now your _D_N_S knows two things: Which machine(s) is(are) responsible for the sub-domain sub.foo.com, and, how to reach it. This information combination is often refer-ed to as the _g_l_u_e _r_e_c_o_r_d. 22..22.. NNoott sseettttiinngg aa ssuubb--ddoommaaiinn It is not necessary to setup a complete sub-domain just to have a sub- category of machine. Suppose that for a project, you want to refer to two machines as ftp.project.foo.com and www.project.foo.com, you can simply defines theses machines IP using the host information screen. The information will be dispatched in the foo.com database. 33.. EEmmaaiill aaddvveerrttiissiinngg It is sometime needed to redirect the email traffic for a host or domain to a specific email server. This is often done "domain wise" in the primary specification screen of a domain. It is sometime necessary to do an exception for either one machine or a sub-domain. You can do this here and specify up to three email servers. 44.. DDeelleettiinngg oonnee DDNNSS eennttrryy The button Del of the dialog is used to delete this record from the DNS. A confirmation pop-up will let you confirm (or not) the deletion. Deleting such a record will cleanup both the domain database and the reverse mapping.