# How do i match in grok

**URL:** <https://discuss.elastic.co/t/how-do-i-match-in-grok/189995>\
**Category:** Logstash\
**Created:** [July 11, 2019, 11:37am UTC](https://discuss.elastic.co/t/how-do-i-match-in-grok/189995 "2019-07-11T11:37:24Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![mancharagopan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mancharagopan/32/60266_2.png) [@mancharagopan](https://discuss.elastic.co/u/mancharagopan)\
**Post date:** [July 11, 2019, 11:37am UTC](https://discuss.elastic.co/t/how-do-i-match-in-grok/189995/1 "2019-07-11T11:37:24Z")

</div>

I want to match ASA syslog message for message id, severity and add it to separate fields. How do i match it in grok?

`<166>Jul 11 2019 16:46:45: %ASA-6-113012: AAA user authentication Successful : local database : user = user1`

I want to match the portions in %ASA-6-113012 separately.

---

<div class="post-metadata">

**Author:** ![ylasri](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ylasri/32/86120_2.png) [@ylasri](https://discuss.elastic.co/u/ylasri)\
**Post date:** [July 11, 2019, 11:53am UTC](https://discuss.elastic.co/t/how-do-i-match-in-grok/189995/2 "2019-07-11T11:53:54Z")

</div>

You can try this sample

```
<%{INT:recordId}>%{DATA:dateTime}: \%%{DATA:asaEventId}: %{GREEDYDATA:messageText1} : %{GREEDYDATA:messageText2} : %{GREEDYDATA:messageText3}

```

Result is here from the provided log line sample

 ![grok_sample](https://us1.discourse-cdn.com/elastic/original/3X/7/7/77d60cf8c23e9803ab0dea696e870e6a6c822d9d.png)

---

<div class="post-metadata">

**Author:** ![ylasri](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ylasri/32/86120_2.png) [@ylasri](https://discuss.elastic.co/u/ylasri)\
**Post date:** [July 11, 2019, 12:00pm UTC](https://discuss.elastic.co/t/how-do-i-match-in-grok/189995/3 "2019-07-11T12:00:09Z")

</div>

This one for extracting portions from the required field

```
<%{INT:recordId}>%{DATA:dateTime}: \%%{DATA:asaEventId_portion1}-%{INT:asaEventId_portion2}-%{INT:asaEventId_portion3}: %{GREEDYDATA:messageText1} : %{GREEDYDATA:messageText2} : %{GREEDYDATA:messageText3}

```

Example debugging result

 ![debug_grok](https://us1.discourse-cdn.com/elastic/original/3X/9/d/9dbf1e171d29bc333465349f7c8e5b263969aadb.png)

---

<div class="post-metadata">

**Author:** ![mancharagopan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mancharagopan/32/60266_2.png) [@mancharagopan](https://discuss.elastic.co/u/mancharagopan)\
**Post date:** [July 11, 2019, 12:02pm UTC](https://discuss.elastic.co/t/how-do-i-match-in-grok/189995/4 "2019-07-11T12:02:49Z")

</div>

Thank you.

---

<div class="post-metadata">

**Author:** ![mancharagopan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mancharagopan/32/60266_2.png) [@mancharagopan](https://discuss.elastic.co/u/mancharagopan)\
**Post date:** [July 11, 2019, 12:34pm UTC](https://discuss.elastic.co/t/how-do-i-match-in-grok/189995/5 "2019-07-11T12:34:23Z")

</div>

I have another question if i may ask,  
I used Filebeat to parse ASA syslog message but i got an error,  
`ERROR	[syslog]	syslog/input.go:132	can't parse event as syslog rfc3164	{"message": "<165>:Jul 10 07:10:12 IST: %ASA-config-5-111010: User 'XXXXX', running 'N/A' from IP 172.x.x.x, executed 'write memory'\n"}`

How do i fix this?

---

<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:** [August 8, 2019, 12:34pm UTC](https://discuss.elastic.co/t/how-do-i-match-in-grok/189995/6 "2019-08-08T12:34:23Z")

</div>

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