# Multiple network interfaces settings and X-PACK
**URL:** https://discuss.elastic.co/t/multiple-network-interfaces-settings-and-x-pack/126585
**Category:** Logstash
**Created:** [April 3, 2018, 1:55pm UTC](https://discuss.elastic.co/t/multiple-network-interfaces-settings-and-x-pack/126585 "2018-04-03T13:55:51Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@dao](https://discuss.elastic.co/u/dao)
#### Post date: [April 3, 2018, 1:55pm UTC](https://discuss.elastic.co/t/multiple-network-interfaces-settings-and-x-pack/126585/1 "2018-04-03T13:55:51Z")
Hello,
I have a server with 2 network interfaces, one on a private network and the other on internet.
On my private network, I have an elasticsearch cluster with X-PACK (ip-filtering). This cluster is not open on internet. I want that logstash communicates with the cluster.
How can I specify logstash to use a specific network interface?
---
### Author:  [@sm00thindian](https://discuss.elastic.co/u/sm00thindian)
#### Post date: [April 3, 2018, 2:50pm UTC](https://discuss.elastic.co/t/multiple-network-interfaces-settings-and-x-pack/126585/2 "2018-04-03T14:50:51Z")
I believe you can bind Logstash by specifying the ip address of the interface you want to use in your logstash.conf file. Mileage may vary
input {
tcp
{ host =\> "10.10.10.10" port =\> 5140 type =\> "json-tcp" debug =\> true }
}
---
### Author:  [@dao](https://discuss.elastic.co/u/dao)
#### Post date: [April 11, 2018, 1:09pm UTC](https://discuss.elastic.co/t/multiple-network-interfaces-settings-and-x-pack/126585/3 "2018-04-11T13:09:01Z")
> [@sm00thindian](#):
>
> can bind Logstash by specifying the ip address of the interface you want
Hello I was not clear enought, I think:
My logstash reads on files (input) and writes into the elasticsearch cluster (output)
The host where logstash runs has 2 network interfaces: a public interface `eth0` IP:`a.a.a.a` and a private interface `eth0:0` IP:b.b.b.b
In the security settings of `elasticsearch.yml` I put an IP filtering mentionning `b.b.b.b`
Now, How can I specify to logstash that it has to connect elasticsearch as the IP `b.b.b.b` and not `a.a.a.a`?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 9, 2018, 1:09pm UTC](https://discuss.elastic.co/t/multiple-network-interfaces-settings-and-x-pack/126585/4 "2018-05-09T13:09:13Z")
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