kamailio-public-private

Configuration for a Kamailio in a Public/Private network.

I'm posting this Kamailio configuration that will serve SIP and TLS/WSS, tested with JSSip and SIPML.

AWS doesn't actually assign a PUBLIC IP address to the instance's network interface. What it doesn is give you a private IP Address and assign a Public IP Address natted to your instance.

I needed a was to isolate the public from the private, so that the private nodes in the private network are not accessible.

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In this architecture, Kamailio uses the same IP Address to "talk" to public IPs as well as private IP Address via the local IPs.

This configuration will:

Act as a REGISTRAR for external clients, SIP over UDP or WSS clients.
Serve requests from the public network SIP/UDP as well as SIP/WSS requests, and load-balance them to the internal freeswitches/asterisks.
Route requests from the private freeswitches/asterisk to the requested domains. In order to do this, in freeSWITCH you need to add to the gateway's configuration the proxy parameter: <param name="proxy" value="KAMAILIO-IP"/>
Proxy RTP via a locally-installed rtpengine.
Copy all SIP messages to the specified HOMER node.

Files included

kamailio.cfg: Kamailio configuration
aliases.cfg: You need to add the domain being served here, i.e.: sip-proxy.domain.com
kamctlrc: Kamailio's config for its db backend
rsyslog: logrotate's configuration to regularly remove big logs
definitions.cfg: All definitions used in Kamailio's config (explained below)

Definitions.cfg

Database-related config

- [KAM_PUBLIC_IP]: The EIP assigned by AWS, to be used when talking to public IPs
- [DBUSER]: The database username
- [DBPASS]: The database password
- [DBHOST]: The database ip address or FQDN

SIP-related config

- LISTEN_OUTSIDE_PORT: The port on which to bind, default: 5060
- LISTEN_OUTSIDE_PROTO: The protocol, default: udp
- [KAM_PRIVATE_IP]: Kamailio's private IP

XMLRPC-related config

- XMLRPC_PORT: Port wher we will receive XMLRPC commands, default: 5066

HOMER-related config

- HOMER_IP!sip:172.31.47.194:9060!g"

WebRTC-related config

- LISTEN_WSS_PORT: The port for incoming webrtc requests, default: 5067
- LISTEN_WSS_PROTO: The protocol for webrtc, default: tls
- LISTEN_WSS_IF: KAM_PRIVATE_IP: Kamailio's private IP

Installing RTPENGINE

git clone https://github.com/sipwise/rtpengine.git
cd rtpengine

INSTALL

apt-get install -y \
debhelper \
default-libmysqlclient-dev  \
gperf  \
iptables-dev \
libavcodec-dev \
libavfilter-dev \
libavformat-dev \
libavutil-dev \
libbencode-perl  \
libcrypt-openssl-rsa-perl  \
libcrypt-rijndael-perl  \
libcurl4-openssl-dev  \
libdigest-crc-perl  \
libdigest-hmac-perl  \
libevent-dev \
libglib2.0-dev \
libhiredis-dev  \
libio-multiplex-perl  \
libio-socket-inet6-perl  \
libiptc-dev  \
libjson-glib-dev  \
libnet-interface-perl  \
libpcre3-dev  \
libsocket6-perl  \
libssl-dev \
libswresample-dev \
libsystemd-dev  \
libxmlrpc-core-c3-dev \
markdown  \
zlib1g-dev \
dkms \
module-assistant && \
libnfsidmap2 && \
libtirpc1 && \
rpcbind && \
keyutils && \
nfs-common

INSTALL

Getting g729 From https://deb.sipwise.com/spce/mr6.2.1/pool/main/b/bcg729/

wget https://deb.sipwise.com/spce/mr6.2.1/pool/main/b/bcg729/libbcg729-0_1.0.4+git20180222-0.1~bpo9+1_amd64.deb
sudo dpkg -i libbcg729-0_1.0.4+git20180222-0.1~bpo9+1_amd64.deb

wget https://deb.sipwise.com/spce/mr6.2.1/pool/main/b/bcg729/libbcg729-dev_1.0.4+git20180222-0.1~bpo9+1_amd64.deb
sudo dpkg -i libbcg729-dev_1.0.4+git20180222-0.1~bpo9+1_amd64.deb

CHECK ALL IS OK WITH

cd rtpengine
dpkg-checkbuilddeps
dpkg-buildpackage

You should get no errors back.

cd ..

dpkg -i ngcp-rtpengine-kernel-dkms_7*.deb && \
dpkg -i ngcp-rtpengine-utils_7*.deb && \
dpkg -i ngcp-rtpengine-daemon_7*.deb && \
dpkg -i ngcp-rtpengine-iptables_7*.deb & \
dpkg -i ngcp-rtpengine-recording-daemon_7*.deb & \
dpkg -i ngcp-rtpengine_7*.deb & \
dpkg -i ngcp-rtpengine-kernel-source_7*.deb

AND SET VALUES SO IT STARTS ON BOOT

vim /etc/default/ngcp-rtpengine-daemon

Configure RTPEngine

Edit /etc/rtpengine/rtpengine.conf

and Set some paramters:

[rtpengine]
table = 0
interface = internal/[YOUR-INTERNAL-IP];external/[YOUR-EXTERNAL-IP]
listen-ng = 22222
listen-tcp = 25060
listen-udp = 12222
listen-cli = 9900
timeout = 60
silent-timeout = 30
tos = 184
pidfile = /var/run/ngcp-rtpengine-daemon.pid
fork = yes
port-min = 30000
port-max = 40000
log-level = 2
log-facility = daemon

Starting RTPEngine

service ngcp-rtpengine-daemon start

Then start kamailio: service kamailio restart

davidcsi / kamailio-private-public

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