[SR-Users] Kamailio questions

Sergey Safarov s.safarov at gmail.com
Wed Nov 15 18:56:04 CET 2017


I not see attached tcpdump PCAP file

ср, 15 нояб. 2017 г. в 14:21, Wilkins, Steve <swwilkins at mitre.org>:

> Hello,
>
>
>
> Kamailio IP: 172.21.1.108, listening on port 5060
>
> Asterisk IP’s: 172.21.1.97, and 172.21.1.124 both listening on port 5060
>
>
>
> Here is a tcpdump which has the issue in it.  I did a MicroSip call, *which
> did work*, and the Error I am speaking of did happen.  Note: In this
> dump, I am running a cluster of 2 Asterisk Servers, however, this Error
> occurs even if I have only one Asterisk server with no dispatching, and
> rtpproxy turned off.  However if rtpproxy is on, after each call, I do see
> an additional error =>
>
>
>
> *Nov 14 08:45:08 vadev2 /usr/local/sbin/kamailio[20525]: ERROR: rtpproxy
> [rtpproxy.c:2536]: force_rtp_proxy(): incorrect port 0 in reply from rtp
> proxy*
>
>
>
> In trying to further understand Kamailio –
>
>    - Is there a way to limit the port trying to be opened to a maximum
>    high number E.g. a port of < 20000?  Even if this would work, I would still
>    like to understand what Kamailio is trying to accomplish by the connection
>    it is trying to make.
>    - Are there any sources for a more in-depth understanding as to how
>    Kamailio functions?
>
>
>
> Also, if anyone has any input on my second question I would really
> appreciate it.
>
>
>
> Thank you for looking at this,
>
>
>
> -Steve
>
>
>
> *From:* sr-users [mailto:sr-users-bounces at lists.kamailio.org] *On Behalf
> Of *Sergey Safarov
> *Sent:* Tuesday, November 14, 2017 1:33 AM
> *To:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> *Subject:* Re: [SR-Users] Kamailio questions
>
>
>
> Need to capture network traffic and analyse by wireshark.
> Command to capture traffic
>
> tcpdump -ni any host 172.1.1.13 -s 0 -w /tmp/traffic.pcap
>
>
>
> вт, 14 нояб. 2017 г., 3:14 Wilkins, Steve <swwilkins at mitre.org>:
>
> Hello,
>
>
>
> I am new to Kamailio and to the Kamailio Mailing list and hope I am using
> it appropriately.
>
>
>
> I am using Kamailio version 5.0.3 (x86_64/linux), and it is installed and
> working on a Centos 7 Sever.  I use Kamailio as a SIP Proxy Server for
> Asterisk and things seem to work fine, however, I do have an issue and a
> question for which I am trying to understand and am hoping someone can help
> me with.
>
>
>
> For the sake of the argument, my server name is *myServer*, and it’s IP
> Address is *172.1.1.13*; Asterisk is on a different server.
>
>
>
> *Issue*:  Every 10 seconds I get an Error message in the Kamailio log
> which says =>
>
>
>
> *Nov 13 18:10:55 myServer /usr/local/sbin/kamailio[29188]: ERROR: <core>
> [core/tcp_main.c:2660]: tcpconn_1st_send(): connect **172.1.1.13:59794*
> <http://172.1.1.13:59794>* failed (RST) Connection refused.*
>
>
>
> I do not know what triggers this error, and as mentioned, things do seem
> to work; I can make calls and use sip tools which pass requests through the
> Kamailio to Asterisk.  Does anyone know what could be causing this Error?
> I do not understand *what is trying to connect to what* at such a high
> port.
>
>
>
>
>
> Question: The way I understand it, *rtpproxy* is needed to pass
> video/audio through Kamailio to Asterisk.  However, even without
> *rtpproxy* running, I get video through to Asterisk and the video plays
> with no issues on a sip device (e.g. MicroSIP).  I am confused what I need
> *rtpproxy* for.
>
> Note: Even with no *rtpproxy*, I get the same error mentioned above in
> the Issue section.
>
>
>
> Thank you,
>
>
>
>
>
>
>
>
>
>
>
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>
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