I have ser.cfg config prettty similar to the getting started guide, using mediaproxy for natted client.
 
The only problem that iam going to have is that when i close a call fromm a client behind NAT i get multiple bye message:
117.088293 83.211.248.158 -> 195.6x.19x.4x SIP/SDP Status: 200 OK, with session description
117.263313 195.6x.19x.4x -> 83.211.248.158 SIP Request: ACK sip:0681140017@83.211.248.158:61421
120.286678 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x
120.455192 195.6x.19x.4x -> 83.211.248.158 SIP Status: 200 OK
120.784615 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x
120.793092 195.6x.19x.45 -> 83.211.248.158 SIP Status: 200 OK
121.783765 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x
121.793036 195.6x.19x.45 -> 83.211.248.158 SIP Status: 200 OK
123.783061 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x
123.793280 195.6x.19x.45 -> 83.211.248.158 SIP Status: 200 OK
127.783147 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x
127.843088 195.6x.19x.45 -> 83.211.248.158 SIP Status: 200 OK
131.782153 83.211.248.158 -> 195.6x.19x.4x SIP Request: BYE sip:0828730167@19x.247.16x.9x
131.791851 195.6x.19x.45 -> 83.211.248.158 SIP Status: 200 OK
135.388829 195.6x.19x.45 -> 83.211.248.158 UDP Source port: 5060  Destination port: 61421
Seems that the 200 Ok is not hittng the client but I don't know how to fix this in ser.cfg
 
Please help.
Regards