# Can´t connect to dedicated serach server
**URL:** https://discuss.elastic.co/t/can-t-connect-to-dedicated-serach-server/6591
**Category:** Elasticsearch
**Created:** [February 4, 2012, 4:30am UTC](https://discuss.elastic.co/t/can-t-connect-to-dedicated-serach-server/6591 "2012-02-04T04:30:08Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@mrblue](https://discuss.elastic.co/u/mrblue)
#### Post date: [February 4, 2012, 4:30am UTC](https://discuss.elastic.co/t/can-t-connect-to-dedicated-serach-server/6591/1 "2012-02-04T04:30:08Z")
Hi,
i decided to set up a dedicated server just for elasticsearch (debian
6.0 squeeze 64 lamp). ES works fine so far, but i can´t connect to it
from another server.
Here is a very simple example:
$ch = curl\_init();
//curl\_setopt($ch, CURLOPT\_URL, "[http://localhost:9200/alle\_uhren/](http://localhost:9200/alle_uhren/)
\_search?pretty=true");
curl\_setopt($ch, CURLOPT\_URL, "[http://xxx.x.xxx.xxx:9200/xxxx/\_search](http://xxx.x.xxx.xxx:9200/xxxx/_search)?
pretty=true");
curl\_setopt($ch, CURLOPT\_RETURNTRANSFER, 1);
curl\_setopt($ch, CURLOPT\_POST, true);
$data = '{
"query" : {
"match\_all" : { }
},"size" : "2000"
}';
curl\_setopt($ch, CURLOPT\_POSTFIELDS, $data);
$jason\_output = curl\_exec($ch);
$info = curl\_getinfo($ch);
curl\_close($ch);
print\_r($jason\_output);
It works fine with localhost, but not from a different server. I can
ping from one server to the other.
Here is what netstat says, there seems to be somthing on 9200, but i
know nothing about these kind of things 😉
tcp 0 0 127.0.0.1:3306 0.0.0.0:\*
LISTEN
tcp 0 0 0.0.0.0:10000 0.0.0.0:\*
LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:\*
LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:\*
LISTEN
tcp 0 0 127.0.0.1:25 0.0.0.0:\*
LISTEN
tcp 0 0 127.0.0.1:32000 0.0.0.0:\*
LISTEN
tcp6 0 0 :::9200 :::\*
LISTEN
tcp6 0 0 :::9300 :::\*
LISTEN
tcp6 0 0 :::21 :::\*
LISTEN
tcp6 0 0 :::22 :::\*
LISTEN
tcp6 0 0 ::1:25 :::\*
LISTEN
Any help is apreciated !
---
### Author:  [@avasilenko](https://discuss.elastic.co/u/avasilenko)
#### Post date: [February 4, 2012, 7:26am UTC](https://discuss.elastic.co/t/can-t-connect-to-dedicated-serach-server/6591/2 "2012-02-04T07:26:55Z")
You should check iptables rules:
> $ iptables -L
And print it here. Probably 9200 port is blocked. As an example in CentOS
all ports, except 22 are blocked for external access.
Alexandr Vasilenko
2012/2/4 mrblue [john.agricola.27@googlemail.com](mailto:john.agricola.27@googlemail.com)
> Hi,
>
> i decided to set up a dedicated server just for elasticsearch (debian
> 6.0 squeeze 64 lamp). ES works fine so far, but i can´t connect to it
> from another server.
>
> Here is a very simple example:
>
> $ch = curl\_init();
> //curl\_setopt($ch, CURLOPT\_URL, "[http://localhost:9200/alle\_uhren/](http://localhost:9200/alle_uhren/)
> \_search?pretty=true");
>
> curl\_setopt($ch, CURLOPT\_URL, "[http://xxx.x.xxx.xxx:9200/xxxx/\_search](http://xxx.x.xxx.xxx:9200/xxxx/_search)?
> pretty=true");
>
> curl\_setopt($ch, CURLOPT\_RETURNTRANSFER, 1);
> curl\_setopt($ch, CURLOPT\_POST, true);
>
> $data = '{
> "query" : {
> "match\_all" : { }
> },"size" : "2000"
> }';
>
> curl\_setopt($ch, CURLOPT\_POSTFIELDS, $data);
> $jason\_output = curl\_exec($ch);
> $info = curl\_getinfo($ch);
> curl\_close($ch);
>
> print\_r($jason\_output);
>
> It works fine with localhost, but not from a different server. I can
> ping from one server to the other.
> Here is what netstat says, there seems to be somthing on 9200, but i
> know nothing about these kind of things 😉
>
> tcp 0 0 127.0.0.1:3306 0.0.0.0:\*
> LISTEN
> tcp 0 0 0.0.0.0:10000 0.0.0.0:\*
> LISTEN
> tcp 0 0 0.0.0.0:80 0.0.0.0:\*
> LISTEN
> tcp 0 0 0.0.0.0:22 0.0.0.0:\*
> LISTEN
> tcp 0 0 127.0.0.1:25 0.0.0.0:\*
> LISTEN
> tcp 0 0 127.0.0.1:32000 0.0.0.0:\*
> LISTEN
> tcp6 0 0 :::9200 :::\*
> LISTEN
> tcp6 0 0 :::9300 :::\*
> LISTEN
> tcp6 0 0 :::21 :::\*
> LISTEN
> tcp6 0 0 :::22 :::\*
> LISTEN
> tcp6 0 0 ::1:25 :::\*
> LISTEN
>
> Any help is apreciated !
---
### Author:  [@Aurelien\_2](https://discuss.elastic.co/u/Aurelien_2)
#### Post date: [February 4, 2012, 7:52am UTC](https://discuss.elastic.co/t/can-t-connect-to-dedicated-serach-server/6591/3 "2012-02-04T07:52:10Z")
Hello.
You may also check if localhost resolve to the local ipv6 address, or try -Djava.net.preferIPv4Stack=true on the java startup command line. Or disable ipv6 on your box if you don't use it.
Rgds.
----- Mail original -----
De: "Alex Vasilenko" [aa.vasilenko@gmail.com](mailto:aa.vasilenko@gmail.com)
À: [elasticsearch@googlegroups.com](mailto:elasticsearch@googlegroups.com)
Envoyé: Samedi 4 Février 2012 08:26:55
Objet: Re: Can´t connect to dedicated serach server
You should check iptables rules:
> $ iptables -L
>
> And print it here. Probably 9200 port is blocked. As an example in CentOS all ports, except 22 are blocked for external access.
>
> Alexandr Vasilenko
>
> 2012/2/4 mrblue \< [john.agricola.27@googlemail.com](mailto:john.agricola.27@googlemail.com) \>
>
> > Hi,
> >
> > i decided to set up a dedicated server just for elasticsearch (debian
> > 6.0 squeeze 64 lamp). ES works fine so far, but i can´t connect to it
> > from another server.
> >
> > Here is a very simple example:
> >
> > $ch = curl\_init();
> > //curl\_setopt($ch, CURLOPT\_URL, " [http://localhost:9200/alle\_uhren/](http://localhost:9200/alle_uhren/)
> > \_search?pretty=true ");
> >
> > curl\_setopt($ch, CURLOPT\_URL, " [http://xxx.x.xxx.xxx:9200/xxxx/\_search](http://xxx.x.xxx.xxx:9200/xxxx/_search)?
> > pretty=true ");
> >
> > curl\_setopt($ch, CURLOPT\_RETURNTRANSFER, 1);
> > curl\_setopt($ch, CURLOPT\_POST, true);
> >
> > $data = '{
> > "query" : {
> > "match\_all" : { }
> > },"size" : "2000"
> > }';
> >
> > curl\_setopt($ch, CURLOPT\_POSTFIELDS, $data);
> > $jason\_output = curl\_exec($ch);
> > $info = curl\_getinfo($ch);
> > curl\_close($ch);
> >
> > print\_r($jason\_output);
> >
> > It works fine with localhost, but not from a different server. I can
> > ping from one server to the other.
> > Here is what netstat says, there seems to be somthing on 9200, but i
> > know nothing about these kind of things 😉
> >
> > tcp 0 0 127.0.0.1:3306 0.0.0.0:\*
> > LISTEN
> > tcp 0 0 0.0.0.0:10000 0.0.0.0:\*
> > LISTEN
> > tcp 0 0 0.0.0.0:80 0.0.0.0:\*
> > LISTEN
> > tcp 0 0 0.0.0.0:22 0.0.0.0:\*
> > LISTEN
> > tcp 0 0 127.0.0.1:25 0.0.0.0:\*
> > LISTEN
> > tcp 0 0 127.0.0.1:32000 0.0.0.0:\*
> > LISTEN
> > tcp6 0 0 :::9200 :::\*
> > LISTEN
> > tcp6 0 0 :::9300 :::\*
> > LISTEN
> > tcp6 0 0 :::21 :::\*
> > LISTEN
> > tcp6 0 0 :::22 :::\*
> > LISTEN
> > tcp6 0 0 ::1:25 :::\*
> > LISTEN
> >
> > Any help is apreciated !
---
### Author:  [@Greg](https://discuss.elastic.co/u/Greg)
#### Post date: [February 4, 2012, 12:01pm UTC](https://discuss.elastic.co/t/can-t-connect-to-dedicated-serach-server/6591/4 "2012-02-04T12:01:33Z")
The problem is that it's only listening on port 9200 for IPv6, not
IPv4:
> LISTEN tcp6 0 0 :::9200 :::\*
This should help:
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>
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On Feb 4, 4:30 am, mrblue [john.agricola...@googlemail.com](mailto:john.agricola...@googlemail.com) wrote:
> Hi,
>
> i decided to set up a dedicated server just for elasticsearch (debian
> 6.0 squeeze 64 lamp). ES works fine so far, but i can´t connect to it
> from another server.
>
> Here is a very simple example:
>
> $ch = curl\_init();
> //curl\_setopt($ch, CURLOPT\_URL, "[http://localhost:9200/alle\_uhren/](http://localhost:9200/alle_uhren/)
> \_search?pretty=true");
>
> curl\_setopt($ch, CURLOPT\_URL, "[http://xxx.x.xxx.xxx:9200/xxxx/\_search](http://xxx.x.xxx.xxx:9200/xxxx/_search)?
> pretty=true");
>
> curl\_setopt($ch, CURLOPT\_RETURNTRANSFER, 1);
> curl\_setopt($ch, CURLOPT\_POST, true);
>
> $data = '{
> "query" : {
> "match\_all" : { }
> },"size" : "2000"
>
> }';
>
> curl\_setopt($ch, CURLOPT\_POSTFIELDS, $data);
> $jason\_output = curl\_exec($ch);
> $info = curl\_getinfo($ch);
> curl\_close($ch);
>
> print\_r($jason\_output);
>
> It works fine with localhost, but not from a different server. I can
> ping from one server to the other.
> Here is what netstat says, there seems to be somthing on 9200, but i
> know nothing about these kind of things 😉
>
> tcp 0 0 127.0.0.1:3306 0.0.0.0:\*
> LISTEN
> tcp 0 0 0.0.0.0:10000 0.0.0.0:\*
> LISTEN
> tcp 0 0 0.0.0.0:80 0.0.0.0:\*
> LISTEN
> tcp 0 0 0.0.0.0:22 0.0.0.0:\*
> LISTEN
> tcp 0 0 127.0.0.1:25 0.0.0.0:\*
> LISTEN
> tcp 0 0 127.0.0.1:32000 0.0.0.0:\*
> LISTEN
> tcp6 0 0 :::9200 :::\*
> LISTEN
> tcp6 0 0 :::9300 :::\*
> LISTEN
> tcp6 0 0 :::21 :::\*
> LISTEN
> tcp6 0 0 :::22 :::\*
> LISTEN
> tcp6 0 0 ::1:25 :::\*
> LISTEN
>
> Any help is apreciated !
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 3:40am UTC](https://discuss.elastic.co/t/can-t-connect-to-dedicated-serach-server/6591/5 "2017-07-06T03:40:38Z")