Dear

Thanks for your quick reply and sorry for spamming your mailbox.

I am very confused about the setup of kamailio.cfg and rtpproxy.
I have an existing kamailio 4.4 - rtpproxy running and I get the config files from both and setup the new vm.
Just private connection works but the idea is to have connection from outside too.
I am sure there is a mismatch with public ip, natting and/or setup of the vm hosts file.

  • architecture:
- 1x virtualbox
  + 1x vm with bridge mode for network (get private ip address from the router). I suppose this is the PRIVATE_IP
+ 1x desktop (windows) hosting a sipphone here Microsip (https://www.microsip.org/)
- 1x modem/router from the telecom provider - bbox-3V+ from PROXIMUS
  + forced in DMZ host the Kamailio server PRIVATE_IP

211001 - kamailio architecture and settings.png

  • the hosts file from Kamailio + rtpproxy is ( Maybe something is wrong or missing)

/etc/hosts

127.0.0.1       localhost
127.0.1.1       sipsecure.by-systems.be sipsecure
192.168.1.19    sipsecure.by-systems.be sipsecure
xxx.XXX.xxx.XXX   sipsecure.by-systems.be sipsecure
# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

/etc/kamailio/kamailio.cfg
kamailio.config

#!define PUBLIC_IP "xxx.xxx.xxx.xxx"
#!define PRIVATE_IP "192.168.1.19"
#!define PRIVATE_NET "192.168.1.0/24“

#!ifdef WITH_NAT

# ----- rtpproxy params -----

modparam("rtpproxy", "rtpproxy_sock", "udp:PRIVATE_IP:7722")


# ----- 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@kamailio.org")


Etc/default/rtpproxy


PRIVATE_IP=192.168.1.19

PUBLIC_IP=xxx.xxx.xxx.xxx

rtpport_min= 10000

rtpport_max=20000

syslog=DBUG:LOG_LOCAL5

#Defaults for rtpproxy
#The control socket.
#CONTROL_SOCK="unix:/var/run/rtpproxy/rtpproxy.sock"
#To listen on an UDP socket, uncomment this line:
#CONTROL_SOCK=udp:127.0.0.1:7722
#Additional options that are passed to the daemon.
EXTRA_OPTS="-l $PRIVATE_IP/$PUBLIC_IP ="-s $PRIVATE_IP:7222 -m $rtpport_min -M $rtpport_max -d $syslog"`



  • Misconfiguring the VM
That means do I need to use setup 1 or 2 or another
  1. 2x NIC interfaces (one with private ip, second from dmz ip + NAT1:1 public ip)
  2. 1x NIC interface (one private ip and natted 1:1 with public address)
  • test
  1. use case 1 : connect two (2x) sipphone from private network (included kamailio) = OK
  2. use case 2 : connect one (1x) codec from private ip and one (1x) codec from public network (like mobile) =  = issue - disconnect after 30 s (register expires) start a conversation with audio but the caller or the callee continues to send and INVITE message.
  3. use case 3 : connect two (2x) sipphone from public network = issue - disconnect after 30 s (register expires) start a conversation with audio but the caller or the callee continue to send an INVITE message.


Best Regards,

Youssef BOUJRAF