Hello! The use case description is as follows,
Application protocol : SIP (http://www.ietf.org/rfc/rfc3261.txt) Domain: Telecom SIP client <------> Application running in VM hosted on Openstack SIP Clinet (IP_WEB)( on web) <-----> Openstack NAT (IP_FLOAT) <--------> Private IP on VM with application(IP_PRIVATE) - SIP client makes a call and request is send to IP_FLOAT which will be translated and send to IP_PRIVATE on VM(SIP APP) SIP Client(IP_WEB)---- INVITE (IP_FLOAT)-->Openstack NAT-->IP_PRIVATE (VM) Now VM responds with 200OK VM (IP_PRIVATE) -->200 OK --> NAT -->SIP Client(IP_WEB) During this dialogue SIP packet Record Routing header ( RR) records the IP_PRIVATE IP of SIP app. Now the SIP client ACKnowledge the 200K but with IP destined to IP_PRIVATE of SIP App in Openstack SIP client ( IP_WEB) ---- ACK ( to IP_PRIVATE) ---> NAT ( ********packet routing fails as its sent to Private IP instead of NAT floating IP******* ). This is a standard 3GPP implementation telecom application. So, I would like to know if there is possibility to access SIP application on openstack from SIP client using a routed network without NAT floating IP. -- James For telecom application use cases using SIP protocol( http://www.ietf.org/rfc/rfc3261.txt) records the IP in it packets where it traverse through. In case of openstack cloud implementation, VM running with this application has internal private associated to a floating IP which is not hosted on this VM. So, when SIP packet
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