(7) dns operation - SOI-Asia
(7) dns operation - SOI-Asia
(7) dns operation - SOI-Asia
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Notes on CNAME (1/2)<br />
Another major source of DNS troubles<br />
Note 1: avoid CNAME chain<br />
foo.example. CNAME bar.example.<br />
bar.example. CNAME baz.example.<br />
... not prohibited, but troublesome<br />
loop-prone<br />
may affect lookup performance<br />
Note 2: do not use CNAME for NS/MX names<br />
kame.example. NS ns.kame.example.<br />
ns.kame.example. CNAME cname.kame.example.<br />
cname.kame.example. A 192.0.2.1
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