# LDAP server connection issue

**URL:** <https://community.sonatype.com/t/ldap-server-connection-issue/6039>\
**Category:** Sonatype Nexus Repository\
**Tags:** nexus-repository, ldap\
**Created:** [March 10, 2021, 8:22am UTC](https://community.sonatype.com/t/ldap-server-connection-issue/6039 "2021-03-10T08:22:37Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![nathay0](https://avatars.discourse-cdn.com/v4/letter/n/ec9cab/32.png) [@nathay0](https://community.sonatype.com/u/nathay0)\
**Post date:** [March 10, 2021, 8:22am UTC](https://community.sonatype.com/t/ldap-server-connection-issue/6039/1 "2021-03-10T08:22:38Z")

</div>

Hi there,

We are using OSS 3.27.0-03 version of Nexus RM inside docker container.

I’m currently trying to configure LDAP authentication but I’m stuck on the very beginning:

Failed to connect to LDAP Server: XXXXX:389 [Caused by java.net.UnknownHostException: XXXXX]

When I test the connection from the container itself using: ldapsearch and same credentials i use in Nexus - it works fine 😕

Any ideas guys ?

---

<div class="post-metadata">

**Author:** ![mpiggott](https://avatars.discourse-cdn.com/v4/letter/m/f0a364/32.png) [@mpiggott](https://community.sonatype.com/u/mpiggott)\
**Post date:** [March 10, 2021, 2:57pm UTC](https://community.sonatype.com/t/ldap-server-connection-issue/6039/2 "2021-03-10T14:57:45Z")

</div>

[https://docs.oracle.com/javase/8/docs/api/java/net/UnknownHostException.html](https://docs.oracle.com/javase/8/docs/api/java/net/UnknownHostException.html)

---

<div class="post-metadata">

**Author:** ![nathay0](https://avatars.discourse-cdn.com/v4/letter/n/ec9cab/32.png) [@nathay0](https://community.sonatype.com/u/nathay0)\
**Post date:** [March 11, 2021, 7:57am UTC](https://community.sonatype.com/t/ldap-server-connection-issue/6039/3 "2021-03-11T07:57:22Z")

</div>

Guess it was DNS issue - adding entry to etc/hosts solved my problem.