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https://issues.apache.org/jira/browse/SOLR-14014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16989370#comment-16989370
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Ishan Chattopadhyaya commented on SOLR-14014:
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Thanks Jason for working on this. I don't like the name "headless", which is
usually referred to absense of GUIs. Solr does start headless today (even when
admin UI enabled). The admin UI is more like a website and served on demand.
How about `-DadminUI=false`?
I like the idea of being able to disable the admin UI. I like the idea of
disabling it by default even more.
(I also support the idea of removing the admin UI completely, because it is
insecure, buggy, outdated, difficult to maintain and shouldn't be part of core
Solr. But I'll deal with the removal later, because it is controversial and I
don't want too disagreements going on right now.)
> Allow Solr to start with Admin UI disabled
> ------------------------------------------
>
> Key: SOLR-14014
> URL: https://issues.apache.org/jira/browse/SOLR-14014
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Admin UI, security
> Affects Versions: master (9.0), 8.3.1
> Reporter: Jason Gerlowski
> Priority: Major
>
> Currently Solr always runs the Admin UI. With the history of XSS issues and
> other security concerns that have been found in the Admin UI, Solr should
> offer a mode where the Admin UI is disabled. Maybe, and this is a topic
> that'll need some serious discussion, this should even be the default when
> Solr starts.
> NOTE: Disabling the Admin UI removes XSS and other attack vectors. But even
> with the Admin UI disabled, Solr will still be inherently unsafe without
> firewall protection on a public network.
> *Proposed design:*
> A java system property called *headless* will be used as an internal flag for
> starting Solr in headless mode. This property will default to true. A java
> property can be used at startup to set this flag to false.
> Here is an example:
> {code:java}
> bin/solr start -Dheadless=false {code}
> A message will be added following startup describing the mode.
> In headless mode the following message will be displayed:
> "solr is running in headless mode. The admin console is unavailable. To to
> turn off headless mode and allow the admin console use the following
> parameter startup parameter:
> -Dheadless=false
>
> In non-headless mode the following message will be displayed:
> "solr is running with headless mode turned off. The admin console is
> available in this mode. Disabling the Admin UI removes XSS and other attack
> vectors"
> If a user attempts to access the admin console while Solr is in headless mode
> it Solr will return 401 unauthorized.
>
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