On Aug 31, 2014, at 8:26 AM, Rich Shepard <[email protected]> wrote:
> For sub-domains I have mail, salmo, and lists; the first two have the > dynamic IP address, the third the static one. > > I thought the sub-domain hosts should be CNAME type, but that's not what > the support person wrote. Many many schools of thought as to whether one should use a CNAME or an A record. Some people say that CNAMEs should never be used, but I use them judiciously. The main drawback to using a CNAME is that it forces a second lookup to find what it’s pointing at. So if you look up a CNAME for ‘mail.appl-ecosys.com’, it says “that’s at ‘appl-ecosys.com’”, then your system has to do another lookup to find that ‘appl-ecosys.com’ is at 50.38.125.178. If they are all A records, then no second lookup is needed. However, if you are keeping track of your dynamic IP, the fewer records you have to update the better, IMNSHO. :) Russell Johnson [email protected] _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
