How to configure a robot that is behind NAT so it can talk to its hub

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Article ID: 107934

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Updated On:

Products

DX Infrastructure Management NIMSOFT PROBES

Issue/Introduction

We cannot deploy any probes on the server and no metrics is appearing in MCS.
Below is the configuration

1) the robot has an IP address of  192.247.XXX.XXX
2) the NATED IP that the hub needs to communicate on is 10.70.XXX.XXX
3) the HUB IP is 10.50.XXX.XXX

In Infrastructure manager the robot shows up as 192.247.XXX.XXX and when we try to deploy configure the controller or deploy probes we get
a communication error because the hub can not communicate on 192.247.XXX.XXX

We tried setting the robotip = 10.70.XXX.XXX but we get the following error in the controller.log on loglevel 3
Jul 25 13:50:05:314 [6020] Controller: Specified IP (10.70.XXX.XXX) is not recognized as a local ip. No IP change, using 192.247.XXX.XXX
 

Cause

It is expected that a hub will be on the same network segment as the robot. In some cases this can not be accomplished and NAT is used.

The following three settings can be used to try and get around this issue.

local_ip_validation = yes /no
strict_ip_binding =  yes / no
robotip_alias = XXX.XXX.XXX.XXX


A different combination of these might need to be tested.
 

Environment

UIM 9.0 and earlier
Robot 7.95 and earlier
hub 7.95 and earlier
 

Resolution

To correct this issue for this client we had to do the following:

in the robot.cfg of the robot we set the following values

hubip = 10.50.XXX.XXX
robotip = 192.247.XXX.XXX
robotip_alias = 10.70.XXX.XXX
local_ip_validation = no
strict_ip_binding = no


Restart the robot watcher service.