# Packetbeat support for tcp6

**URL:** <https://discuss.elastic.co/t/packetbeat-support-for-tcp6/87894>\
**Category:** Beats\
**Tags:** packetbeat\
**Created:** [June 1, 2017, 11:37am UTC](https://discuss.elastic.co/t/packetbeat-support-for-tcp6/87894 "2017-06-01T11:37:55Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![rychu777](https://avatars.discourse-cdn.com/v4/letter/r/53a042/32.png) [@rychu777](https://discuss.elastic.co/u/rychu777)\
**Post date:** [June 1, 2017, 11:37am UTC](https://discuss.elastic.co/t/packetbeat-support-for-tcp6/87894/1 "2017-06-01T11:37:55Z")

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I cannot get proc details for tcp6 port, not sure if Packetbeat is able to grab it.

I want to monitor http 8181 port, for java process (currently pid 8985).

> netstat --all --program | grep 8985:  
> tcp 0 0 _:5005 : LISTEN 8985/java  
> ....  
> tcp6 0 0 [::]:8181 [::]:_ LISTEN 8985/java

I've setup packetbeat.yml with this config:

> ```
> packetbeat.protocols.http:
> ports: [5005, 8181]
> packetbeat.procs:
> enabled: true
> monitored:
> - process: java
> cmdline_grep: java
> 
> ```

And I'm intercepting requests, however they doesnt have 'proc' field filled:

> { ... "ip":"127.0.0.1","method":"GET","path":"/api/endpoint-test","port":8181,"proc":"" }

I've enabled debug and I can see that packetbeat found port 5005 (tcp)

> 2017-06-01T13:04:57+02:00 DBG UpdateMappingEntry(): port=5005 pid=%!d(string=java)

But it doesn't know about 8181 which is tcp6.  
I've check source code and it looks suspicious for me:

> ipv6socks, err := socketsFromProc("/proc/net/tcp6", true)

...

> func socketsFromProc(filename string, ipv6 bool) (\*socketInfo, error) {  
> file, err := os.Open("/proc/net/tcp")  
> if err != nil {  
> return nil, err  
> }  
> defer file.Close()  
> return parseProcNetTCP(file, false)  
> }

If i'm not mistaken filename variable is not used and /proc/net/tcp6 is not scanned.

Am I doing sth wrong or is there a bug in code?

(Im using version 5.4.x)

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**Author:** ![steffens](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/steffens/32/79630_2.png) [@steffens](https://discuss.elastic.co/u/steffens)\
**Post date:** [June 6, 2017, 9:36am UTC](https://discuss.elastic.co/t/packetbeat-support-for-tcp6/87894/2 "2017-06-06T09:36:44Z")

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Ouch. Looks like a bug. Have you tried to fix this and open a PR?

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<div class="post-metadata">

**Author:** ![rychu777](https://avatars.discourse-cdn.com/v4/letter/r/53a042/32.png) [@rychu777](https://discuss.elastic.co/u/rychu777)\
**Post date:** [June 6, 2017, 8:08pm UTC](https://discuss.elastic.co/t/packetbeat-support-for-tcp6/87894/3 "2017-06-06T20:08:26Z")

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Already did, waiting for merge and release.

> <https://github.com/elastic/beats/pull/4442>

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 4, 2017, 8:08pm UTC](https://discuss.elastic.co/t/packetbeat-support-for-tcp6/87894/4 "2017-07-04T20:08:38Z")

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