# Extract server name used by FileBeats to connect to LogStash
**URL:** https://discuss.elastic.co/t/extract-server-name-used-by-filebeats-to-connect-to-logstash/183495
**Category:** Logstash
**Created:** [May 30, 2019, 9:13am UTC](https://discuss.elastic.co/t/extract-server-name-used-by-filebeats-to-connect-to-logstash/183495 "2019-05-30T09:13:42Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@funduraghu](https://discuss.elastic.co/u/funduraghu)
#### Post date: [May 30, 2019, 9:13am UTC](https://discuss.elastic.co/t/extract-server-name-used-by-filebeats-to-connect-to-logstash/183495/1 "2019-05-30T09:13:42Z")
I've set up multiple FileBeats instances on different machines to send syslog to a single central LogStash server.
I have created ssl certs and have setup SSL communication (as explained in documentation) between FileBeats & LogStash.
Each FileBeats instances uses a different dns name to send logs, but all these dns names resolve to same LogStash instance.
The flow is working fine and I'm seeing logs on LogStash end.
Now, I want to differentiate the incoming logs at LogStash end based on dns name used by FileBeats.
I can't use different ports because there may be hundreds of FileBeats instances and it will not be scalable.
Is there a way to obtain the dns name in LogStash?
Will SNI be available in LogStash?
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### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [May 30, 2019, 12:10pm UTC](https://discuss.elastic.co/t/extract-server-name-used-by-filebeats-to-connect-to-logstash/183495/2 "2019-05-30T12:10:11Z")
If every filebeat is configured to use a different dns name for logstash, can you also configure them to add that name to the events using a fields option?
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### Author:  [@funduraghu](https://discuss.elastic.co/u/funduraghu)
#### Post date: [May 31, 2019, 6:01am UTC](https://discuss.elastic.co/t/extract-server-name-used-by-filebeats-to-connect-to-logstash/183495/3 "2019-05-31T06:01:58Z")
That is a possible solution.
However, is there any way on LogStash end to extract the dns name used assuming that we can't add a new field on client side?
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### Author:  [@Badger](https://discuss.elastic.co/u/Badger)
#### Post date: [May 31, 2019, 11:45am UTC](https://discuss.elastic.co/t/extract-server-name-used-by-filebeats-to-connect-to-logstash/183495/4 "2019-05-31T11:45:14Z")
> [@funduraghu](#):
>
> However, is there any way on LogStash end to extract the dns name used
Not that I can think of.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [June 28, 2019, 11:45am UTC](https://discuss.elastic.co/t/extract-server-name-used-by-filebeats-to-connect-to-logstash/183495/5 "2019-06-28T11:45:15Z")
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