Day: 25 September 2024

Setting up Kamailio with TLS and RTPProxy can be a bit complex, but I’ll guide you through the process step by step. Here's an outline of what you need to do: 1. Setup and Prerequisites Ensure you have the following components installed: A machine with Linux (Ubuntu/Debian preferred). Kamailio SIP server. RTPProxy for media relaying. TLS certificates (self-signed or CA-signed). 2. Kamailio Installation Update your system and install dependencies:bashCopy codesudo apt update && sudo apt upgrade -y sudo apt install build-essential curl net-tools sudo apt install libssl-dev libmariadb-dev libmariadb3 Add the Kamailio repository:bashCopy codesudo sh -c "echo 'deb http://deb.kamailio.org/kamailio55 bionic main' > /etc/apt/sources.list.d/kamailio.list" wget -O- http://deb.kamailio.org/kamailiodebkey.gpg | sudo apt-key add - sudo apt update Install Kamailio:bashCopy code sudo apt install kamailio kamailio-mysql-modules kamailio-tls-modules Enable MySQL support: Edit /etc/kamailio/kamctlrc and set the DBENGINE to MYSQL:bashCopy codeDBENGINE=MYSQL Create the database:bashCopy code sudo kamdbctl create 3. Configure TLS in Kamailio Generate TLS Certificates (self-signed or from a trusted CA):bashCopy codeopenssl genrsa -out /etc/kamailio/kamailio.key 2048 openssl req -new -key /etc/kamailio/kamailio.key -out /etc/kamailio/kamailio.csr openssl x509 -req -days 365 -in /etc/kamailio/kamailio.csr -signkey /etc/kamailio/kamailio.key -out /etc/kamailio/kamailio.crt Configure Kamailio for TLS by editing the main configuration file /etc/kamailio/kamailio.cfg: Set the listening port for TLS.bashCopy codelisten=tls:your-ip:5061 Load the TLS module:bashCopy codeloadmodule "tls.so" Configure the TLS settings:bashCopy codemodparam("tls", "config", "/etc/kamailio/tls.cfg") Create TLS Configuration File (/etc/kamailio/tls.cfg):bashCopy code[server:default] method = TLSv1.2 verify_certificate = no require_certificate = no private_key = /etc/kamailio/kamailio.key certificate = /etc/kamailio/kamailio.crt Restart Kamailio:bashCopy codesudo systemctl restart kamailio 4. Install and Configure RTPProxy Install RTPProxy:bashCopy codesudo apt install rtpproxy Run RTPProxy with the following command:bashCopy codertpproxy -F -l your-ip -s udp:127.0.0.1:7722 -u rtpproxy -p /var/run/rtpproxy/rtpproxy.pid Explanation: -F: Forks the process to run in the background. -l: Specifies the external IP address. -s: The socket address for communication between Kamailio and RTPProxy. -u: The user that runs RTPProxy. -p: Specifies the PID file. Configure Kamailio to use RTPProxy: Load the RTPProxy module in the Kamailio configuration file (/etc/kamailio/kamailio.cfg):bashCopy codeloadmodule "rtpproxy.so" modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:7722") Use the RTPProxy functions in the routing logic. For example, in the route block of kamailio.cfg:bashCopy codeif (is_method("INVITE")) { if (rtpproxy_offer()) { xlog("L_INFO", "RTPProxy offer succeeded\n"); } } if (is_method("ACK")) { rtpproxy_answer(); } if (is_method("BYE") || is_method("CANCEL")) { rtpproxy_stop(); } Restart Kamailio to apply the changes:bashCopy codesudo systemctl restart kamailio 5. Testing the Setup Verify Kamailio is listening on the required ports:bashCopy codenetstat -ntlp | grep kamailio You should see Kamailio listening on port 5061 for TLS. Verify RTPProxy is running:bashCopy codeps aux | grep rtpproxy Use a SIP client that supports TLS and send an INVITE request. The call flow should use TLS for signaling and RTPProxy to relay media. 6. Troubleshooting Kamailio logs: Check /var/log/syslog or run kamailio in debug mode. RTPProxy logs: Logs are usually found in /var/log/rtpproxy.log. This setup provides a basic configuration for Kamailio using TLS for secure signaling and RTPProxy for media handling. For more advanced features, such as authentication or NAT traversal, you may need additional configuration tweaks.

Day: 25 September 2024

How to Setup Kamailio with TLS and RTPProxy

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