this post was submitted on 18 Mar 2024
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This makes no freakin sense to me, and it's driving me bonkers. Censored for work purposes obv.

Hosts file:

1.1.1.1 site.com

$ping site.com

PING site.com (1.1.1.1)

^C

$ping http://site.com

ping: unknown host http://site.com

What?? Ping, You JUST RESOLVED site.com, why can't you resolve it now??

Why does the addition of the protocol break DNS resolution?

It's CentOS 6.10, quite old..

/etc/nsswitch has:

hosts: files dns

Any pointers would be much appreciated.

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[–] [email protected] 46 points 5 months ago (1 children)

http://site.com isn't a valid host name, DNS won't resolve it. DNS does not understand protocol, it's taking your whole query as the hostname

[–] [email protected] 14 points 5 months ago

Ah thanks, that's my problem, it's me.

[–] [email protected] 13 points 5 months ago