# Checking infrastructure communication

**URL:** <https://community.dynatrace.com/t/checking-infrastructure-communication/21229>\
**Category:** Dynatrace Managed\
**Tags:** installation, dynatrace-managed\
**Created:** [January 18, 2021, 2:13pm UTC](https://community.dynatrace.com/t/checking-infrastructure-communication/21229 "2021-01-18T14:13:42Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![jaramos](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/jaramos/32/22922_2.png) [@jaramos](https://community.dynatrace.com/u/jaramos)\
**Post date:** [January 18, 2021, 2:13pm UTC](https://community.dynatrace.com/t/checking-infrastructure-communication/21229/1 "2021-01-18T14:13:42Z")

</div>

Hello everyone.

I am installing DT managed: 3 nodes cluster and 10 activegates.

Before doing the component installation I need to check that the communications are fine:

- between machines for cluster nodes

- between AG machines and cluster nodes (backwards)

- OA’s machines and AG’s machines

What command should I use to do it? Telnet, shh, ping …?

Thanks a lot and best regards.

Jose A

---

<div class="post-metadata">

**Author:** ![pahofmann](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/pahofmann/32/17076_2.png) [@pahofmann](https://community.dynatrace.com/u/pahofmann)\
**Post date:** [January 18, 2021, 2:30pm UTC](https://community.dynatrace.com/t/checking-infrastructure-communication/21229/2 "2021-01-18T14:30:49Z")

</div>

You can use **telnet** to check if the connection is possible. If the components aren’t installed, nothing is listening on the remote port yet of course.

You can use **netcat** to listen on a port, so you can connect to it with telnet to test the connection e.g.:

```auto
nc -lv IP PORT

```

So for example to test OneAgent connections:

On the AG machine:

```auto
nc -lv AG-IP 9999

```

On the OA machine

```auto
telnet AG-IP 9999

```

---

<div class="post-metadata">

**Author:** ![jaramos](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/jaramos/32/22922_2.png) [@jaramos](https://community.dynatrace.com/u/jaramos)\
**Post date:** [January 19, 2021, 11:37am UTC](https://community.dynatrace.com/t/checking-infrastructure-communication/21229/3 "2021-01-19T11:37:51Z")

</div>

One more doubt.

How can I check that there is communication from node clusters to MissionControl?

Thanks again.

BR

Jose A

---

<div class="post-metadata">

**Author:** ![pahofmann](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/pahofmann/32/17076_2.png) [@pahofmann](https://community.dynatrace.com/u/pahofmann)\
**Post date:** [January 19, 2021, 11:46am UTC](https://community.dynatrace.com/t/checking-infrastructure-communication/21229/4 "2021-01-19T11:46:53Z")

</div>

You can use telnet there too, you can find the hostname and IP addresses for Mission Control [in the documentation](https://www.dynatrace.com/support/help/shortlink/managed-network-ports#outbound-communication-to-dynatrace-mission-control).