<div dir="ltr"><div>Hi Kai,<br><br></div>I am not a fan of such integrated solutions.
Before we used Freeswitch we had an all in one PBX from Alcatel with
integrated Internet Router/Firewall. The Service was crap and when we
wanted to do something special it wasn’t working or costed a lot. We use
Openbsd as router/firewall now. The entire VOIP runs in a separate VLAN.
Have you successfully set up freeswitch without using the Digibox?<br><br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Paul,<div><br></div><div>got it running in several sites without
major problems. As you said transport is either TCP or TLS. Faxing is
basically passthrough only as the do not offer gateway services and I
did not find a subscriber terminating T.38. If you use their provided
equipment (Digibox) you so not need to setup anything special as the
port mapping will be handled by the box itself (SIP and RTP gateway
included). <br></div></blockquote><div><br></div><div>Hi Paul, <br></div><div><br></div><div>Good to here that Keep-Alive is working. I found some reports on the internet where people opened ports from the firewall and wanted to restrict the IP range. However, incoming and outgoing servers seem to change frequently. All in all, it is probably not possible to narrow this down to 100%, which is why this is not good "protection".<br></div><div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><p>You may find out additional information about the trunk when
querying DNS for SRV and NAPTR records.</p></blockquote><div><br></div><div>Hi Giovanni,</div><div><br></div><div>I haven't dealt with kamailio yet. The possibilities seem to be almost limitless, as the functions go far beyond a simple proxy. <br></div><div>But setting up a simple proxy shouldn't be so difficult ? I have already invested a lot more work in the setup of Freeswitch than <br>a normal plug and play user would do. <span id="gmail-result_box" class="gmail-" lang="en"><span class="gmail-">Unfortunately, I can't find much information about this topic in connection with Freeswitch.</span></span><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>There are not ready made secure way to implement sip, particularly and especially a sip proxy. </div></blockquote>
<br></div><br></div><div class="gmail_extra"><br><div class="gmail_quote">2018-01-28 18:40 GMT+01:00 Kai Danielmeier <span dir="ltr"><<a href="mailto:kai.danielmeier@gmail.com" target="_blank">kai.danielmeier@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Paul,<div><br></div><div>got it running in several sites without major problems. As you said transport is either TCP or TLS. Faxing is basically passthrough only as the do not offer gateway services and I did not find a subscriber terminating T.38. If you use their provided equipment (Digibox) you so not need to setup anything special as the port mapping will be handled by the box itself (SIP and RTP gateway included). </div><div><br></div><div>BR</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>Kai</div></font></span></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">2018-01-27 18:55 GMT+01:00 Paul Muaddib <span dir="ltr"><<a href="mailto:paul.muaddib83@gmail.com" target="_blank">paul.muaddib83@gmail.com</a>></span>:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div dir="ltr"><div><div>Hi,<br><br>does anyone here have experience with the SIP trunk
service from the German Telekom: "DeutschlandLAN SIP-Trunk"? There is
little information from Deutsche Telekom on the Internet besides the
"Technical Technical Specification of the SIP - 1TR114" As I have read
so far, Deutsche Telekom has not necessarily been sticking to the
standard. <br><br>What I know so far<br><br>Transport protocol is probably TCP instead of UDP<br>Codecs: G. 711a and G. 722<br>Fax either via G. 711a or T. 38<br><br>My Setup<br>Internet <-----> Router/Firewall(NAT) <----> Freeswitch<br><br>According
to the instructions, they require you to open several ports in the
firewall. Is that really necessary? Does the Keep-Alive function work
without opening any port?<br><br>At the Federal Office for Information Security (BSI) it is additionally recommended to use a SIP proxy such as kamailio<br><br>At
the moment we are still using an ISDN gateway. I don't like to run into
problems when we switch over, because I can't go back then.<br><br></div>Best regards,<br></div>Paul</div>
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