# Data Filter issue

**URL:** <https://discuss.elastic.co/t/data-filter-issue/105331>\
**Category:** Logstash\
**Created:** [October 26, 2017, 5:18am UTC](https://discuss.elastic.co/t/data-filter-issue/105331 "2017-10-26T05:18:10Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![cdra](https://avatars.discourse-cdn.com/v4/letter/c/ea666f/32.png) [@cdra](https://discuss.elastic.co/u/cdra)\
**Post date:** [October 26, 2017, 5:18am UTC](https://discuss.elastic.co/t/data-filter-issue/105331/1 "2017-10-26T05:18:10Z")

</div>

We have some switches that send syslog messages like:  
Oct 25 16:35:05 2017 wsscc000 %%10SHELL/6/SHELL\_CMD(l): -Task=vt0-IPAddr=10.61.7.10-User=afg; Command is sys

In this case, logstash set syslog\_hostname = 2017 not wsscc000

---

<div class="post-metadata">

**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\
**Post date:** [October 26, 2017, 5:23am UTC](https://discuss.elastic.co/t/data-filter-issue/105331/2 "2017-10-26T05:23:32Z")

</div>

Then you'll have to use a custom grok filter. If you currently use a syslog input I think you'll have to switch to a tcp and/or udp input and add the necessary filters separately.

---

<div class="post-metadata">

**Author:** ![cdra](https://avatars.discourse-cdn.com/v4/letter/c/ea666f/32.png) [@cdra](https://discuss.elastic.co/u/cdra)\
**Post date:** [October 26, 2017, 5:59am UTC](https://discuss.elastic.co/t/data-filter-issue/105331/3 "2017-10-26T05:59:37Z")

</div>

Unix / Linux computer don't send year field...so it work fine...but in some switches don't work because year field exists.. My grok filter is like:  
if [type] == "syslog" {  
grok {  
match =\> { "message" =\> "%{SYSLOGTIMESTAMP:syslog\_timestamp} %{SYSLOGHOST:syslog\_hostname} %{DATA:syslog\_program}(?:[%{POSINT:syslog\_pid}])?: %{GREEDYDATA:syslog\_message}" }

Input is like:  
input {  
tcp {  
port =\> 514  
type =\> "syslog"  
}  
udp {  
port =\> 514  
type =\> "syslog"  
}

---

<div class="post-metadata">

**Author:** ![cdra](https://avatars.discourse-cdn.com/v4/letter/c/ea666f/32.png) [@cdra](https://discuss.elastic.co/u/cdra)\
**Post date:** [October 26, 2017, 7:00am UTC](https://discuss.elastic.co/t/data-filter-issue/105331/4 "2017-10-26T07:00:11Z")

</div>

My solution:  
grok {  
match =\> { "message" =\> ["%{SYSLOGTIMESTAMP:syslog\_timestamp} %{YEAR:syslog\_year} %{SYSLOGHOST:syslog\_hostname} %{DATA:syslog\_program}(?:[%{POSINT:syslog\_pid}])?: %{GREEDYDATA:syslog\_message}","%{SYSLOGTIMESTAMP:syslog\_timestamp} %{SYSLOGHOST:syslog\_hostname} %{DATA:syslog\_program}(?:[%{POSINT:syslog\_pid}])?: %{GREEDYDATA:syslog\_message}"]}

}

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [November 23, 2017, 7:00am UTC](https://discuss.elastic.co/t/data-filter-issue/105331/5 "2017-11-23T07:00:19Z")

</div>

Closed on November 23, 2017, 7:00am UTC

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.