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<p class="MsoNormal">Hello – I have a common problem but I have spent a few hours researching and cannot find the definitive answer.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are setting up a vpn (site-to-site) to a customer (juniper firewall). We have found that their subnet and our subnet are overlapping.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So our subnet is on 10.180.11.0/24 and theirs is 10.180.0.0/16<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We have set up site-to-site vpns using openswan before with success but not with this scenario.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can we setup the system so that some kind of routing using iptables will make our side look like something that does not overlap like 10.220.11.0/24?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I mean we would leave our internal network alone but put something in openswan/iptables that “translates” or converts how the other side sees our ip address
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Diagram:<o:p></o:p></p>
<p class="MsoNormal">Their side (10.180.0.0/16) <span style="font-family:Wingdings">
à</span> Their VPN Firewall (public ip) <span style="font-family:Wingdings">à</span> Internet
<span style="font-family:Wingdings">à</span> our openswan (public) [viewed as 10.220.11.0/24]
<span style="font-family:Wingdings">à</span> some magic fix to map 10.220.11.0/24 to our “real network” of 10.180.11.0/24
<span style="font-family:Wingdings">à</span> our real servers<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We actually only have 3 servers to be accessed in our network so if we need to do some setup for each individual ip that is fine
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks dave<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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