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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9552) KVM Security Groups do not allow DNS over TCP egress
Date Tue, 08 Nov 2016 09:36:58 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15647031#comment-15647031
] 

ASF subversion and git services commented on CLOUDSTACK-9552:
-------------------------------------------------------------

Commit 6f609e6946e5099c09f649f26da5ef2a2103d889 in cloudstack's branch refs/heads/4.9 from
[~rohit.yadav@shapeblue.com]
[ https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;h=6f609e6 ]

Merge pull request #1713 from wido/CLOUDSTACK-9552

CLOUDSTACK-9552: Allow egress TCP/53 implicitly in Basic NetworkingAllow DNS queries over
TCP when egress filtering is configured.

When using DNSSEC more and more queries are done over TCP and this
requires 53/TCP to be allowed.

Signed-off-by: Wido den Hollander wido@widodh.nl

* pr/1713:
  CLOUDSTACK-9552: Allow egress TCP/53 implicitly in Basic Networking

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>


> KVM Security Groups do not allow DNS over TCP egress
> ----------------------------------------------------
>
>                 Key: CLOUDSTACK-9552
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9552
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: KVM
>    Affects Versions: 4.8.0, 4.9.0
>         Environment: KVM Basic Networking
>            Reporter: Wido den Hollander
>            Assignee: Wido den Hollander
>              Labels: dns, dnssec, security-groups
>             Fix For: Future
>
>
> When egress filtering is configured all outbound traffic is blocked unless configured
otherwise.
> With the exception that UDP/53 DNS is allowed implicitly by the Security Groups.
> Many DNS responses are larger then 4k, with DNSSEC for example and require TCP to be
allowed.
> The Security Groups should also allow TCP/53 when egress filtering is configured.



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