Showing results for 
Search instead for 
Did you mean: 
Sign up Log in

It's not the same without you

Join the community to find out what other Atlassian users are discussing, debating and creating.

Atlassian Community Hero Image Collage

Applications won't authenticate with Crowd after moving to Windows Server 2016.


We've been moving all our applications from a Windows 7 box to a Windows Server 2016 VM, and everything but Crowd has been easy.

Crowd boots just fine, and I can log in to it.

When I try to log into an application, the authentication fails.
The error I get is 

2018-11-07 13:00:17,538 https-openssl-nio-8096-exec-14 ERROR [[Catalina].[localhost].[/crowd].[default]] Servlet.service() for servlet [default] in context with path [/crowd] threw exception
java.lang.RuntimeException: invalid IPv6 address
at com.atlassian.crowd.manager.validation.XForwardedForUtil.getTrustedAddress(

This makes no sense. I have no idea why it's trying to parse an IPv4 address as IPv6.
I also have no idea what the port is.

To explain the set up, we have IIS running on a machine which reverse proxies to the Server 2016 box (

Crowd has an additional adaptor listening to port 8096, which has the SSL connection stuff in it, and the proxy pass. 

The original Windows 7 has both IPv4 and IPv6 enabled, which the Server 2016 box also has.

Does anyone know how to fix this?

I'm really struggling trying to find anyone with the same problem.


Kind regards,



1 answer

1 accepted

0 votes
Answer accepted

So I've worked out what my issue is.

In IIS, the Application Request Routing proxy settings have an option for including the TCP port from the client IP in the X-Forwarded-For header.

If I disable this, Crowd no longer views this as an IPv6 address, and works correctly.

My assumption is that the code is looking for the presence of the colon to determine if the IP address is IPv6. Because the port was included, this was tricking it into thinking it was.

Suggest an answer

Log in or Sign up to answer
Community showcase
Asked in Jira Service Desk

Calling all Insight users, we need your help!

Hello Insight users,  As part of our (Mindville's) acquisition by Atlassian, our training team is looking to build some new Insight training materials. It would really helpful if you can ...

102 views 1 0
View question

Community Events

Connect with like-minded Atlassian users at free events near you!

Find an event

Connect with like-minded Atlassian users at free events near you!

Unfortunately there are no Community Events near you at the moment.

Host an event

You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events

Events near you