# Linux/Unix DNS question

**URL:** <https://www.ruby-forum.com/t/linux-unix-dns-question/186971>\
**Category:** Rails\
**Created:** [April 15, 2010, 4:38am UTC](https://www.ruby-forum.com/t/linux-unix-dns-question/186971 "2010-04-15T04:38:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Jeffrey\_LSTaylor](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/ee7513/32.png) [@Jeffrey\_LSTaylor](https://www.ruby-forum.com/u/Jeffrey_LSTaylor)\
**Post date:** [April 15, 2010, 4:38am UTC](https://www.ruby-forum.com/t/linux-unix-dns-question/186971/1 "2010-04-15T04:38:27Z")

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While traveling, I found a motel with WiFi where Firefox and the DNS  
utilities,  
nslookup and dig, worked as expected, but wget, termtter (a CLI Twitter  
client), my Ruby on Rails applications, and several other programs could  
not  
resolve any domain names (getaddrinfo error, from memory). If I plugged  
the  
IP address obtained with nslookup into /etc/hosts, they worked as  
expected.

Could anyone enlighten me about how these programs resolve domain names  
differently?

TIA,  
Jeffrey

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**Author:** ![Jeffrey\_LSTaylor](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/ee7513/32.png) [@Jeffrey\_LSTaylor](https://www.ruby-forum.com/u/Jeffrey_LSTaylor)\
**Post date:** [April 15, 2010, 4:53am UTC](https://www.ruby-forum.com/t/linux-unix-dns-question/186971/2 "2010-04-15T04:53:40Z")

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Sounds like the ports were being blocked.

On 14 April 2010 21:36, Jeffrey L. Taylor [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> differently?  
> .  
> For more options, visit this group at  
> [http://groups.google.com/group/rubyonrails-talk?hl=en](http://groups.google.com/group/rubyonrails-talk?hl=en).

–  
Charles A. Lopez  
removed\_email\_address@domain.invalid

What’s your vision for your organization?  
What’s your biggest challenge?

Let’s talk.  
(IBM Partner)

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**Author:** ![Jeffrey\_LSTaylor](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/ee7513/32.png) [@Jeffrey\_LSTaylor](https://www.ruby-forum.com/u/Jeffrey_LSTaylor)\
**Post date:** [April 15, 2010, 6:47am UTC](https://www.ruby-forum.com/t/linux-unix-dns-question/186971/3 "2010-04-15T06:47:13Z")

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Which ports. clearly not 53 (DNS).

Jeffrey

Quoting C. A. Lopez [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):