My config :
ISR2811 and NAT+FW are not the same equipment.
ISR2811 : IP-to-IP feature, only one network interface + private ip address.
NAT+FW : not a Cisco equipment. Do not support SIP inspection to replace private IP address by public, in SIP and SDP payload
Dynamic RTP ports affectation is not my issue. All ports are statiquely mapped to ISR2811.
Since NAT+FW do not provide SIP inspection, is there a way/feature/command to indicate public IP address to the ISR2811 ? The goal is to make all SIP signalisation and SDP fields of outgoing calls directly with the public IP address, instead of private IP address.
Thank you for your help.