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https://issues.apache.org/jira/browse/CLOUDSTACK-10346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16444148#comment-16444148
]
ASF GitHub Bot commented on CLOUDSTACK-10346:
---------------------------------------------
rafaelweingartner closed pull request #2514: [CLOUDSTACK-10346] Problem with
NAT configuration and VMs not accessing each other via public IPs
URL: https://github.com/apache/cloudstack/pull/2514
This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:
As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):
diff --git a/systemvm/debian/opt/cloud/bin/configure.py
b/systemvm/debian/opt/cloud/bin/configure.py
index a3b7674926c..c83d832b202 100755
--- a/systemvm/debian/opt/cloud/bin/configure.py
+++ b/systemvm/debian/opt/cloud/bin/configure.py
@@ -801,6 +801,7 @@ def portsToString(self, ports, delimiter):
return "%s%s%s" % (ports_parts[0], delimiter, ports_parts[1])
def processForwardRule(self, rule):
+ logging.info("Is going to process VPC forwarding: %s",
self.config.is_vpc())
if self.config.is_vpc():
self.forward_vpc(rule)
else:
@@ -894,6 +895,15 @@ def forward_vpc(self, rule):
if not rule["internal_ports"] == "any":
fw_prerout_rule += ":" +
self.portsToString(rule["internal_ports"], "-")
+ fw_prerout_rule2 = "-A PREROUTING -d %s/32 -i %s" %
(rule["public_ip"], self.getDeviceByIp(rule['internal_ip']))
+ if not rule["protocol"] == "any":
+ fw_prerout_rule2 += " -m %s -p %s" % (rule["protocol"],
rule["protocol"])
+ if not rule["public_ports"] == "any":
+ fw_prerout_rule2 += " --dport %s" %
self.portsToString(rule["public_ports"], ":")
+ fw_prerout_rule2 += " -j DNAT --to-destination %s" %
rule["internal_ip"]
+ if not rule["internal_ports"] == "any":
+ fw_prerout_rule2 += ":" +
self.portsToString(rule["internal_ports"], "-")
+
fw_postrout_rule = "-A POSTROUTING -d %s/32 " % rule["public_ip"]
if not rule["protocol"] == "any":
fw_postrout_rule += " -m %s -p %s" % (rule["protocol"],
rule["protocol"])
@@ -913,6 +923,7 @@ def forward_vpc(self, rule):
fw_output_rule += ":" + self.portsToString(rule["internal_ports"],
"-")
self.fw.append(["nat", "", fw_prerout_rule])
+ self.fw.append(["nat", "", fw_prerout_rule2])
self.fw.append(["nat", "", fw_postrout_rule])
self.fw.append(["nat", "", fw_output_rule])
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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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