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https://issues.apache.org/jira/browse/CLOUDSTACK-9552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15647031#comment-15647031
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ASF subversion and git services commented on CLOUDSTACK-9552:
-------------------------------------------------------------
Commit 6f609e6946e5099c09f649f26da5ef2a2103d889 in cloudstack's branch
refs/heads/4.9 from [~rohit.ya...@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 w...@widodh.nl
* pr/1713:
CLOUDSTACK-9552: Allow egress TCP/53 implicitly in Basic Networking
Signed-off-by: Rohit Yadav <rohit.ya...@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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