[SR-Users] Not getting packets between peers!

[Yurisbel Jimenez]

Problems getting audio when call from outside mi LAN.

Both peers in my LAN perfect.

One peer in my LAN, and another outside in the cellphone company 
internet; the one outside don't delivery any packet to the one inside my 
LAN Them can see each other and try to talk but the packets sended to 
the other party get lost. No one receive anything.

Restarting services for rtpproxy and kamailio after every try.

Here is my configuration on /etc/default/rtpproxy file:

USER=kamailio
GROUP=kamailio


CONTROL_SOCK="unix:/var/run/rtpproxy/rtpproxy.sock"
EXTRA_OPTS="-l 72.28.208.16 -s udp:localhost:7722"

Here my configuration on kamailio.cfg file corresponding with NAT:

#!ifdef WITH_NAT
# ----- rtpproxy params -----
#modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:7722")
modparam("rtpproxy", "rtpproxy_sock", 
"unix:/var/run/rtpproxy/rtpproxy.sock")

# ----- nathelper params -----
modparam("nathelper", "natping_interval", 30)
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)
modparam("nathelper", "sipping_from", "sip:pinger at kamailio.org")

# params needed for NAT traversal in other modules
modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)")
modparam("usrloc", "nat_bflag", FLB_NATB)
#!endif

Ports opened in my router for Kamailio:
udp:35000-65365, udp-tcp:5060, 5061

I know this is personal information but this server is a case study. I'm 
Trying to learn from you all and if it's possible contribute in the 
future with some knowledge.

Two users for you to test:

user name: support
domain: uscallfree.com
password: support
Not TLS yet

user name: master
domain: uscallfree.com
password: master
Not TLS yet

If one of you wants to try what happen when calls from one peer use that 
one above, my user name always active is admin at uscallfree.com. I know 
it's not working but maybe helps to determine what it's happening.

admin at uscallfree.com active 24 hrs. in my nexus 4 native SIP profile 
configuration.

Thank for the help provided here in the mailing list. You all rocks