# Socket PDU: Host not found (authoritative)

**URL:** <https://www.ruby-forum.com/t/socket-pdu-host-not-found-authoritative/240411>\
**Category:** GNU Radio\
**Created:** [April 12, 2014, 5:24pm UTC](https://www.ruby-forum.com/t/socket-pdu-host-not-found-authoritative/240411 "2014-04-12T17:24:50Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\
**Post date:** [April 12, 2014, 5:24pm UTC](https://www.ruby-forum.com/t/socket-pdu-host-not-found-authoritative/240411/1 "2014-04-12T17:24:50Z")

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**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\
**Post date:** [April 12, 2014, 5:39pm UTC](https://www.ruby-forum.com/t/socket-pdu-host-not-found-authoritative/240411/2 "2014-04-12T17:39:34Z")

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Hi Alex,

This looks like a DNS error. I don’t know what OS you are on, or why  
the udp\_source tries to lookup the name instead of just taking it as  
an IP address. My guess is a typo, something like a comma in place of  
a dot between the numerals…

In the rarest configurations something could have gone wrong with your  
loopback device, so that there is no 127.0.0.1; you should be able to  
check that using “ping 127.0.0.1”.

Greetings,  
Marcus

On 12.04.2014 17:23, Alex W. wrote:

> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Discuss-gnuradio  
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> [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

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**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\
**Post date:** [April 12, 2014, 6:20pm UTC](https://www.ruby-forum.com/t/socket-pdu-host-not-found-authoritative/240411/3 "2014-04-12T18:20:52Z")

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**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\
**Post date:** [April 12, 2014, 7:02pm UTC](https://www.ruby-forum.com/t/socket-pdu-host-not-found-authoritative/240411/4 "2014-04-12T19:02:10Z")

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**Author:** ![squeegy](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dec6dc/32.png) [@squeegy](https://www.ruby-forum.com/u/squeegy)\
**Post date:** [April 12, 2014, 7:25pm UTC](https://www.ruby-forum.com/t/socket-pdu-host-not-found-authoritative/240411/5 "2014-04-12T19:25:46Z")

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Hi Alex,

good work 🙂 I guess you’ve already fixed your own repo, but I’ll open  
a pull request anyway.

If you want to try “my” patched version (its really not mine, I just  
ported the patch to socket\_pdu),

git pull [GitHub - marcusmueller/gnuradio: GNU Radio · GitHub](https://github.com/marcusmueller/gnuradio.git)  
socket\_pdu\_fix\_resolver\_issue

Greetings,  
Marcus

On 12.04.2014 19:00, Alex W. wrote:

> At least that’s the idea. But I can’t start the socket\_PDU. I could  
> This looks like a DNS error. I don’t know what OS you are on, or  
> On 12.04.2014 17:23, Alex W. wrote:
> 
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> 
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> mailing list [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
> [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

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