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DT Managed: Proxy Error While Installing Second Cluster Node

While trying to install a second node to a DT Managed cluster, we get the following error:

Failed to send GET request to error 2 - connection error: (...)1): Max retries exceeded with url: /api/v1.0/control/serverManagement/operationState (Caused by ProxyError('Cannot connect to proxy.', error('Tunnel connection failed: 403 Tunnel or SSL Forbidden',))) is the IP of the primary cluster node from which we downloaded the installer using the wget command. We can still reach that host using other various commands (ping, telnet, etc.). Since the two nodes are on the same network segment, there should be no proxy involvement at all. The ports between the two nodes are also open in the firewall rules.


Dynatrace Guru
Dynatrace Guru

As the issue states - there's definitely a proxy in between. Check your routing and proxy configuration settings.

Senior Technical Product Manager,
Dynatrace Managed expert

The client is convinced that there is no proxy between the two nodes.

One thing that may be creating an issue is that, in the management console, we set up the proxy settings for connecting to DT Mission Control. Would the installer package be trying to use the same proxy settings to connect to the initial node and failing since the proxy is not involved in this connection?

that is right

Senior Technical Product Manager,
Dynatrace Managed expert

Alright, so do we clear out the proxy settings on the Managed cluster before adding more nodes? It seems odd that those would be inherited by the installer.

Just to make sure, I am talking about these proxy settings in DT Managed console.

No we don't clear them. New node will get the same proxy setting from the seed node. There's also no proxy defined to connect to the other node. So this is definitely your network related issue.

Senior Technical Product Manager,
Dynatrace Managed expert

Hello All,

I have the same problem

I want to add a second node to the first, but when I run the command to download the .sh package, i get a 404 error

Proxy request sent, awaiting response... 404 not found

Sharing Knowledge

Please check your network setting. Connection between nodes shouldn't require a proxy. Or proxy should be transparent.
Senior Technical Product Manager,
Dynatrace Managed expert


@Gregory J. there should be a workaround for this. In the in server's configuration, there are several sections beginning with name http.client , each setting is used for different connection type (opc / external requests / ... )

So to turn off proxy for a type of connection, just add:

proxy-off = true

To the appropriate section to the and restart the dynatrace-server process.

TEMPEST a.s., Slovakia, Dynatrace Master Partner