---
title: "EasySSO NTLM domain.netbios.name failure due to NETLOGON connection timeout"
canonical: "https://www.techtime-initiative.com/space/EasySSO/6521315/EasySSO%20NTLM%20domain.netbios.name%20failure%20due%20to%20NETLOGON%20connection%20timeout"
format: markdown
---
## Problem

I am pressing Test Connection in EasySSO NTLM Authenticator and getting the following message. Why is this showing up and how can I fix this?

```
Error testing account abcd$
jespa.security.SecurityProviderException: Failed to retrieve property: domain.netbios.name
Caused by:
   jespa.security.SecurityProviderException: Failed to retrieve NETLOGON domain trust information
   java.net.SocketTimeoutException: connect timed out
```

## Solution

EasySSO uses DNS to discover Domain Controllers serving the domain specified in the configuration (for more details see: [EasySSO NTLM domain.netbios.name failure to locate Domain Controller records](https://techtime-website.atlassian.net/wiki/spaces/EasySSO/pages/6423143)

Once domain controllers have been discovered, EasySSO picks one and attempts to find what TCP port number to use for NETLOGON communication.

This is done by connecting to "RPC Portmapper" service listening on TCP port 135 on the Domain Controller side. For each Domain Controller this service will return a high number port, that is normally stable, but can be different between controllers.

This exception that your are getting happens when a firewall between the Domain Controller and the host of the Atlassian application that runs EasySSO doesn't allow connection on this high port.

You can see the IP address of the specific Domain Controller to which the connection is attempted and the port number in *jespa.log* file, right before the exception with this error message.

Please enable log level 4 - TRACE as described in [How to get the logs](https://techtime-website.atlassian.net/wiki/spaces/EasySSO/pages/4522300) article, re-attempt the test, download the log file and review.

## See other solutions

Please review[ NTLM Configuration Troubleshooting](https://techtime-website.atlassian.net/wiki/spaces/EasySSO/pages/6423119)