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https://issues.apache.org/jira/browse/KAFKA-3665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15405659#comment-15405659
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Ryan P commented on KAFKA-3665:
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RFC-6066 describes an extension to the TLS protocol to handle the VIP case.
https://tools.ietf.org/html/rfc6066#page-6
Setting the SNI field within a client request, JSSE sets this field by default,
allows the VIP to determine the correct named virtual host for the request and
set the connection up accordingly from the start.
> Default ssl.endpoint.identification.algorithm should be https
> -------------------------------------------------------------
>
> Key: KAFKA-3665
> URL: https://issues.apache.org/jira/browse/KAFKA-3665
> Project: Kafka
> Issue Type: Bug
> Components: security
> Affects Versions: 0.9.0.1, 0.10.0.0
> Reporter: Ismael Juma
> Assignee: Ismael Juma
> Fix For: 0.10.1.0
>
>
> The default `ssl.endpoint.identification.algorithm` is `null` which is not a
> secure default (man in the middle attacks are possible).
> We should probably use `https` instead. A more conservative alternative would
> be to update the documentation instead of changing the default.
> A paper on the topic (thanks to Ryan Pridgeon for the reference):
> http://www.cs.utexas.edu/~shmat/shmat_ccs12.pdf
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