[Serusers] relaying the public ip also through rtpproxy
Klaus Darilion
klaus.mailinglists at pernau.at
Sat Dec 4 13:56:14 CET 2004
don't make the NAT test - just use force_rtpproxy for every INVITE
message and every response to an INVITE message.
klaus
voip technocrat wrote:
> hello friends,
>
> i want to relay all the rtp traffic through my
> rtpproxy
>
> i.e irrespective of is it in public ip or in private
> ip
>
> so what guidelines do i need to follow to achive this
>
> this is my current ser.cfg
>
> my ultimate aim is that all the rtpptrafic must go
> from
> the rtpproxy ip only
>
>
> *******************************************************
> # ----------- global configuration parameters
> ------------------------
>
> debug=8 # debug level (cmd line:
> -dddddddddd)
> fork=yes
> log_stderror=yes # (cmd line: -E)
>
>
> check_via=no # (cmd. line: -v)
> dns=no # (cmd. line: -r)
> rev_dns=no # (cmd. line: -R)
> port=5060
> children=4
> fifo="/tmp/ser_fifo"
>
> # ------------------ module loading
> ----------------------------------
>
> # Uncomment this if you want to use SQL database
> #loadmodule "/usr/local/lib/ser/modules/mysql.so"
>
> loadmodule "/usr/local/lib/ser/modules/sl.so"
> loadmodule "/usr/local/lib/ser/modules/tm.so"
> loadmodule "/usr/local/lib/ser/modules/rr.so"
> loadmodule "/usr/local/lib/ser/modules/maxfwd.so"
> loadmodule "/usr/local/lib/ser/modules/usrloc.so"
> loadmodule "/usr/local/lib/ser/modules/registrar.so"
> loadmodule "/usr/local/lib/ser/modules/textops.so"
>
> # Uncomment this if you want digest authentication
> # mysql.so must be loaded !
> #loadmodule "/usr/local/lib/ser/modules/auth.so"
> #loadmodule "/usr/local/lib/ser/modules/auth_db.so"
>
> # !! Nathelper
> loadmodule "/usr/local/lib/ser/modules/nathelper.so"
>
> # ----------------- setting module-specific parameters
> ---------------
>
> # -- 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)
>
> # !! Nathelper
> modparam("registrar", "nat_flag", 6)
> modparam("nathelper", "natping_interval", 30) # Ping
> interval 30 s
> modparam("nathelper", "ping_nated_only", 1) # Ping
> only clients behind NAT
>
> # ------------------------- 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");
> break;
> };
> if (msg:len >= max_len ) {
> sl_send_reply("513", "Message too
> big");
> break;
> };
>
> # !! Nathelper
> # Special handling for NATed clients; first,
> NAT test is
> # executed: it looks for via!=received and
> RFC1918 addresses
> # in Contact (may fail if line-folding is
> used); also,
> # the received test should, if completed,
> should check all
> # vias for rpesence of received
> if (nat_uac_test("3")) {
> # Allow RR-ed requests, as these may
> indicate that
> # a NAT-enabled proxy takes care of
> it; unless it is
> # a REGISTER
>
> if (method == "REGISTER" || !
> search("^Record-Route:")) {
> log("LOG: Someone trying to
> register from private IP, rewriting\n");
>
> # This will work only for user
> agents that support symmetric
> # communication. We tested quite
> many of them and majority is
> # smart enough to be symmetric. In
> some phones it takes a configuration
> # option. With Cisco 7960, it is
> called NAT_Enable=Yes, with kphone it is
> # called "symmetric media" and
> "symmetric signalling".
>
> fix_nated_contact(); # Rewrite
> contact with source IP of signalling
> if (method == "INVITE") {
> fix_nated_sdp("1"); # Add
> direction=active to SDP
> };
> force_rport(); # Add rport
> parameter to topmost Via
> setflag(6); # Mark as NATed
> };
> };
>
> # 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();
>
> # 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);
> break;
> };
>
> if (!uri==myself) {
> # mark routing logic in request
> append_hf("P-hint: outbound\r\n");
>
>
> route(1);
> break;
> };
>
> # 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") {
> save("location");
> break;
> };
>
>
>
>
> lookup("aliases");
>
> # native SIP destinations are handled
> using our USRLOC DB
> if (!lookup("location")) {
> sl_send_reply("404", "Not
> Found");
> break;
> };
> };
> append_hf("P-hint: usrloc applied\r\n");
>
> route(1);
> }
>
> route[1]
> {
>
> # !! Nathelper
> if
> (uri=~"[@:](192\.168\.|10\.|172\.(1[6-9]|2[0-9]|3[0-1])\.)"
> && !search("^Route:")){
> sl_send_reply("479", "We don't forward to
> private IP addresses");
> break;
> };
>
> # if client or server know to be behind a NAT,
> enable relay
> if (isflagset(6)) {
> force_rtp_proxy();
> };
>
> # NAT processing of replies; apply to all
> transactions (for example,
> # re-INVITEs from public to private UA are
> hard to identify as
> # NATed at the moment of request processing);
> look at replies
> t_on_reply("1");
>
> # send it out now; use stateful forwarding as
> it works reliably
> # even for UDP2TCP
> if (!t_relay()) {
> sl_reply_error();
> };
> }
>
> # !! Nathelper
> onreply_route[1] {
> # NATed transaction ?
> if (isflagset(6) && status =~ "(183)|2[0-9][0-9]")
> {
> fix_nated_contact();
> force_rtp_proxy();
> # otherwise, is it a transaction behind a NAT and
> we did not
> # know at time of request processing ? (RFC1918
> contacts)
> } else if (nat_uac_test("1")) {
> fix_nated_contact();
> };
> }
>
> *******************************************************
>
>
>
>
>
>
> with regards
> voip technocrat
>
>
>
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