DNS cleanup

Hal Murray hmurray at megapathdsl.net
Wed Apr 12 11:25:01 UTC 2017


> Pardon my ignorance, but what would we use the TTL for?

It tells you when to retry the pool DNS so you will get new data.

>From dig:
;; ANSWER SECTION:
0.fedora.pool.ntp.org.  150     IN      A       74.82.59.150
0.fedora.pool.ntp.org.  150     IN      A       104.131.53.252
0.fedora.pool.ntp.org.  150     IN      A       45.127.112.2
0.fedora.pool.ntp.org.  150     IN      A       208.53.158.34

The 150 is the TTL.

Of course, a caching DNS server might drop them sooner.  Then an earlier 
reload might get a different answer, but if all goes well, that's a good and 
polite time to wait.


-- 
These are my opinions.  I hate spam.





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