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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-10346) Problem with NAT configuration and VMs not accessing each other via public IPs
Date Wed, 18 Apr 2018 18:11:00 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-10346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16442968#comment-16442968
] 

ASF GitHub Bot commented on CLOUDSTACK-10346:
---------------------------------------------

rhtyd commented on issue #2514: [CLOUDSTACK-10346] Problem with NAT configuration and VMs
not accessing each other via public IPs
URL: https://github.com/apache/cloudstack/pull/2514#issuecomment-382478623
 
 
   @rafaelweingartner can you test against 4.11? I tested it against 4.11 ( you can verify
yourself the lab env). A lot has changed between 4.9 and 4.11 including python based systemvm
codebase and VR template, it is possible that my fix does not work in your 4.9 based env.

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> Problem with NAT configuration and VMs not accessing each other via public IPs
> ------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-10346
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-10346
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>            Reporter: Rafael Weingärtner
>            Assignee: Rafael Weingärtner
>            Priority: Major
>
> When users create a VPC, and configure a NAT from a public IP to application in a VM.
This VM(applications) are not accessible via public IP for other VMs in the same VPC.
>  
> The problem is in the NAT table. If you take a closer look at rules, you will see something
like:
> {code:java}
> -A PREROUTING -d publicIP/32 -i eth1 -p tcp -m tcp --dport 80 -j DNAT --to-destination
internalIp:80
> {code}
> The problem is that according to this rule only packets coming via eth1(public interface),
will be “redirected” to the internal IP. We need an extra entry to each one of the NAT
configurations. For the presented rule, we would need something like:
> {code:java}
> -A PREROUTING -d publicIP/32 -i eth2 -p tcp -m tcp --dport 80 -j DNAT --to-destination
internalIp:80
> {code}



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