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<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">I am currently – (struggling) – to work out how to best achieve an outcome to the following scenario, and would appreciate any help you could provide.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">Scenario<o:p></o:p></span></b></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l1 level1 lfo1"><![if !supportLists]><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">RoadWarrior IPSEC IKEv2 VPN Gateway<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l1 level1 lfo1"><![if !supportLists]><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">Routing to multiple backends, based on certificates<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><img width="602" height="225" id="Picture_x0020_2" src="cid:image004.jpg@01CE65D9.ED4C43F0"></span><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">Current Setup</span></b><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">I have Strongswan running on a Ubuntu Server VM – with 3 Virtual NIC’s currently attached.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">eth0 Public Facing Interface 10.1.0.2<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">eth1 Internal NIC Subnet ID 172.17.81.137/27<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo2">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">eth2 Internal NIC Subnet ID 162.17.81.137/27<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif"">Users should be able to access only the relevant backend subnet for their role, and this is achieved using Wildcards in the certificates, and multiple configuration
groups in SS.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">conn group1<br>
left=10.1.0.2<br>
leftcert=vpnserver.crt<br>
leftsubnet=172.17.81.128/27<br>
leftid=vpnserver.of.our.company.fqdn<br>
leftfirewall=yes<br>
right=%any<br>
rightid="DC=de, DC=company, O=Companyname, OU=group1 certificate, CN=*"<br>
rightsourceip=10.0.50.0/24<br>
auto=add<br>
<br>
conn group2<br>
left=10.1.0.2<br>
leftcert=vpnserver.crt<br>
leftsubnet=162.17.81.128/27<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:72.0pt"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""> leftid=vpnserver.of.our.company.fqdn<br>
leftfirewall=yes<br>
right=%any<br>
rightid="DC=de, DC=company, O=Companyname, OU=group2 certificate, CN=*"<br>
rightsourceip=10.0.60.0/24<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">The idea here is that users in Group 2 shouldn’t be able to access the Subnet’s defined in Group 1.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">This configuration works in so much that IKEv2 connections are established and resources can be accessed from both zones.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">However….</span></b><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""> Currently the IPTABLES rules are wide open, so I can cross
access resources.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">So my question is (and please bear in mind I am not an expert in IPTABLES / Firewalling):<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l3 level1 lfo3"><![if !supportLists]><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">How do I go about configuring the IPTABLES firewall such that only devices connected to group1 can access group1 subnets, and the same for group2.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l3 level1 lfo3"><![if !supportLists]><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">How do I secure the front facing IP address of the gateway such that only IKE connections are allowed in?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l3 level1 lfo3"><![if !supportLists]><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">What is the best way to implement these IPTABLES scripts?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">Also – I may need some help with the routing so for information..<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo4">
<![if !supportLists]><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">Default GW on the 172.x.x.x subnet = 172.17.81.138<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt;text-indent:-18.0pt;mso-list:l2 level1 lfo4">
<![if !supportLists]><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">Default GW on the 162.x.x.x subnet = 162,17,81.138<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"HP Simplified Light","sans-serif"">Regards,</span><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"HP Simplified Light","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;font-family:"HP Simplified","sans-serif";color:black">Andy Paton<br>
</span></b><span style="font-size:9.0pt;font-family:"HP Simplified","sans-serif";color:#717172">Business Development Solution Architect<br>
<br>
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