OpenSER Configuration File to Load Balance ComtelPBX Servers

Contents of “/usr/local/etc/openser/openser.cfg” – remove ‘s before “#”:

'#
'# $Id: openser.cfg 1827 2007-03-12 15:22:53Z bogdan_iancu $
'#
'# simple quick-start config script
'# Please refer to the Core CookBook at http://www.openser.org/dokuwiki/doku.php
'# for a explanation of possible statements, functions and parameters.
'#

'# ----------- global configuration parameters ------------------------

debug=3            '# debug level (cmd line: -dddddddddd)
fork=yes
log_stderror=no    '# (cmd line: -E)
children=4

'# Uncomment these lines to enter debugging mode
'#fork=no
'#log_stderror=yes
'#

port=5060

'# uncomment the following lines for TLS support
'#disable_tls = 0
'#listen = tls:your_IP:5061
'#tls_verify_server = 1
'#tls_verify_client = 1
'#tls_require_client_certificate = 0
'#tls_method = TLSv1
'#tls_certificate = "/usr/local/etc/openser/tls/user/user-cert.pem"
'#tls_private_key = "/usr/local/etc/openser/tls/user/user-privkey.pem"
'#tls_ca_list = "/usr/local/etc/openser/tls/user/user-calist.pem"

'# ------------------ module loading ----------------------------------

'#set module path
mpath="/usr/local/lib/openser/modules/"

"# Uncomment this if you want to use SQL database
'#loadmodule "mysql.so"

loadmodule "sl.so"
loadmodule "tm.so"
loadmodule "rr.so"
loadmodule "maxfwd.so"
loadmodule "usrloc.so"
loadmodule "registrar.so"
loadmodule "textops.so"
loadmodule "mi_fifo.so"
loadmodule "dispatcher.so"

'# Uncomment this if you want digest authentication
'# mysql.so must be loaded !
'#loadmodule "auth.so"
'#loadmodule "auth_db.so"

'# ----------------- setting module-specific parameters ---------------

'# -- mi_fifo params --

modparam("mi_fifo", "fifo_name", "/tmp/openser_fifo")

modparam("dispatcher", "list_file", "/usr/local/etc/openser/dispatcher.cfg")

'# -- usrloc params --


modparam("usrloc", "db_mode",   0)

'# Uncomment this if you want to use SQL database
'# for persistent storage and comment the previous line
'#modparam("usrloc", "db_mode", 2)

'# -- auth params --
'# Uncomment if you are using auth module
'#
'#modparam("auth_db", "calculate_ha1", yes)
'#
'# If you set "calculate_ha1" parameter to yes (which true in this config),
'# uncomment also the following parameter)
'#
'#modparam("auth_db", "password_column", "password")

'# -- rr params --
'# add value to ;lr param to make some broken UAs happy
modparam("rr", "enable_full_lr", 1)

'# -------------------------  request routing logic -------------------


'# main routing logic

route{

        '# initial sanity checks -- messages with
        '# max_forwards==0, or excessively long requests
        if (!mf_process_maxfwd_header("10")) {
                sl_send_reply("483","Too Many Hops");
                exit;
        };

        if (msg:len >=  2048 ) {
                sl_send_reply("513", "Message too big");
                exit;
        };

        '# we record-route all messages -- to make sure that
        '# subsequent messages will go through our proxy; that's
        '# particularly good if upstream and downstream entities
        '# use different transport protocol
        if (!method=="REGISTER")
                record_route();

        if ( method=="INVITE" ) {
                ds_select_dst("1","4");
                sl_send_reply("100","Trying");
'#               t_relay();
                forward();

                exit;
        }

        '# subsequent messages withing a dialog should take the
        '# path determined by record-routing
        if (loose_route()) {
                '# mark routing logic in request
                append_hf("P-hint: rr-enforced\r\n");
                route(1);
        };


        if (!uri==myself) {
                '# mark routing logic in request
                append_hf("P-hint: outbound\r\n");
                '# if you have some interdomain connections via TLS
                '#if(uri=~"@tls_domain1.net") {
                '#       t_relay("tls:domain1.net");
                '#       exit;
                '#} else if(uri=~"@tls_domain2.net") {
                '#       t_relay("tls:domain2.net");
                '#       exit;
                '#}
                route(1);
        };

        '# if the request is for other domain use UsrLoc
        '# (in case, it does not work, use the following command
        '# with proper names and addresses in it)
        if (uri==myself) {

                if (method=="REGISTER") {

                        '# Uncomment this if you want to use digest authentication
                        '#if (!www_authorize("openser.org", "subscriber")) {
                        '#       www_challenge("openser.org", "0");
                        '#       exit;
                        '#};

                        save("location");
                        exit;
                };

                lookup("aliases");
                if (!uri==myself) {
                        append_hf("P-hint: outbound alias\r\n");
                        route(1);
                };

                '# native SIP destinations are handled using our USRLOC DB
                if (!lookup("location")) {
                        sl_send_reply("404", "Not Found");
                        exit;
                };
                append_hf("P-hint: usrloc applied\r\n");
        };

        route(1);
}

route[1] {
        '# send it out now; use stateful forwarding as it works reliably
        '# even for UDP2TCP
        if (!t_relay()) {
                sl_reply_error();
        };
        exit;
}