Hello,

there is a limitation of uac_auth() mentioned in the readme of uac module. Perhaps asterisk doesn't accept the follow up request with credentials having the same cseq value.

You should just configure asterisk to allow traffic from kamailio based on ip address, without username/password authentication.

Cheers,
Daniel

On 16/04/14 09:19, neumann wrote:
Hi all sorry for my english!
Iam trying to authenticate as uac on 3rd party server(Asterisk).
Kamailio get 401, send next invite with DIGEST but Asterisk send 401 again(((
Asterisk don’t write in log what auth is failed.


115.600045 xxx.xxx.xxx.xxx -> yyy.yyy.yyy.yyy SIP/SDP 1093 Request: INVITE sip:321321231@xxx.xxx.xxx.xxx, with session description
115.601818 yyy.yyy.yyy.yyy -> xxx.xxx.xxx.xxx SIP 674 Status: 401 Unauthorized
115.602470 xxx.xxx.xxx.xxx -> yyy.yyy.yyy.yyy SIP 389 Request: ACK sip:321321231@xxx.xxx.xxx.xxx
115.604310 xxx.xxx.xxx.xxx -> yyy.yyy.yyy.yyy SIP/SDP 1267 Request: INVITE sip:321321231@xxx.xxx.xxx.xxx, with session description
115.605537 yyy.yyy.yyy.yyy -> xxx.xxx.xxx.xxx SIP 674 Status: 401 Unauthorized
115.606431 xxx.xxx.xxx.xxx -> yyy.yyy.yyy.yyy SIP 389 Request: ACK sip:321321231@xxx.xxx.xxx.xxx

My aster peer:

[kamailio]
type=peer
defaultuser=kamailio
secret=1234
host=dynamic
disallow=all
allow=alaw
nat=no
qualify=yes



My kamailio config:


modparam("uac","auth_username_avp","$avp(s:uac_user)")
modparam("uac","auth_password_avp","$avp(s:uac_pass)")
modparam("uac","auth_realm_avp","$avp(s:uac_realm)")

route[DISPATCH_OUT] {
            if(!ds_select_dst( 4, 8)){
                    send_reply("404", "No destination");
                    exit;
            }
            t_set_fr(0,2000);
            t_on_failure("RTF_DISPATCH_OUT");
            t_relay();
            exit;
}

failure_route[RTF_DISPATCH_OUT] {
        if (t_is_canceled()) {
                exit;
        }

    if ( t_check_status("401|407") ) {
        $avp(s:uac_user) = "kamailio";
        $avp(s:uac_pass) = "1234";
        $avp(s:uac_realm) = "asterisk";
       
        if (isflagset(7)) {
            t_reply("513","Authentication failed");
            xlog("L_INFO", "[%ci]: Remote authentication failed\n");
            break;
        }

        if (uac_auth()) {
            xlog("L_INFO", "401/407 message recived");
            # mark that auth was performed
            setflag(7);
            # trigger again the failure route
            t_on_failure("RTF_DISPATCH_OUT");
            # repeat the request with auth response this time
            append_branch();
            #t_relay_to_udp("94.25.100.198","5060");
            t_relay();
            break;
        } else {
            xlog("L_INFO", "uac_auth filed!!!!!!!!!!!");
        }
        t_reply("514","Unknow authentication peer");
        xlog("L_INFO", "[%ci]: Unknown authentication peer.\n");
        break;
    }

        # next DST - only for 500 or local timeout
        if (t_check_status("500") or t_check_status("480") or (t_branch_timeout() and !t_branch_replied())){
        ds_mark_dst("p");
                if(ds_next_dst()){
                        t_set_fr(0,2000);
                        t_on_failure("RTF_DISPATCH_OUT");
                        route(RELAY);
                        exit;
                }
        }
}



————————————

Timofeev Dmitry
VoIP Engineer
Linux, Asterisk, Freeswitch, Cisco solutions
Skype: itsroot
icq: 227227933





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