<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<body>
<div dir="auto">
<div dir="auto"><div dir="auto" style="font-family: sans-serif;">Hi,</div><div dir="auto" style="font-family: sans-serif;"><br></div><div dir="auto" style="font-family: sans-serif;"><br></div><div dir="auto" style="font-family: sans-serif;">The whole sip protocol is blocked and udp VPN don't connect and tcp ones they delay packets a lot so calls end up heavily choppy. On mobile data the restrictions are even heavier and if packets are anywhere close to VoIP or VoIP over VPN etc they get filtered. Etisalat is the isp which buys blocking equipment from some vendor in UK who specialize in blocking VoIP and VPN. Last I was told by some person working there was they use a lot of L7 packet inspectors.</div><div dir="auto" style="font-family: sans-serif;"><br></div><div dir="auto" style="font-family: sans-serif;">Secondly it's not about setting up custom solutions for any company or client but we generate a lot of retail traffic so users need something that they can run on mobile etc like a customized dialer. Untill now I used to give them a openvpn profile which they used to run and then use Zoiper to place calls but all that is blocked now.</div><div dir="auto" style="font-family: sans-serif;"><br></div><div dir="auto" style="font-family: sans-serif;">Webrtc seems to work as of now coz it's new but there isn't a webrtc based mobile dialer till now which anyone can install and just use it to place calls</div><div dir="auto" style="font-family: sans-serif;"><br></div><div dir="auto" style="font-family: sans-serif;"><br></div></div><div dir='auto'><br></div>
<div id="aqm-original" style="color: black;">
<!-- body start -->
<div class="aqm-original-body">
<div style="color: black;">
<p style="color: black; font-size: 10pt; font-family: sans-serif; margin: 8pt 0;">On February 19, 2019 9:47:46 PM Sergey Safarov <s.safarov@gmail.com> wrote:</p>
<blockquote type="cite" class="gmail_quote" style="margin: 0 0 0 0.75ex; border-left: 1px solid #808080; padding-left: 0.75ex;">
<div dir="ltr">In your case need<br>1) increase ptime value to 40;<br>2) use codec without compression;<br>3) need to enable VAD feature;<div><br>Also you can route torrent client network traffic via VPN together with VoIP traffic. This will mask VoIP packets and not allow math your traffic to VoIP profile on ISP equipment.</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">вт, 19 февр. 2019 г. в 19:53, Bipin Patel via FreeSWITCH-users <<a href="mailto:freeswitch-users@lists.freeswitch.org">freeswitch-users@lists.freeswitch.org</a>>:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br><br><br>---------- Forwarded message ----------<br>From: Bipin Patel <<a href="mailto:bipin@xbipin.com" target="_blank">bipin@xbipin.com</a>><br>To: FreeSWITCH Users Help <<a href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.freeswitch.org</a>><br>Cc: <br>Bcc: <br>Date: Tue, 19 Feb 2019 20:24:20 +0400<br>Subject: VoIP encryption recommendations<br>
<div text="#000000" bgcolor="#FFFFFF">
<span><span style="font-family: Arial;">hi,<br>
<br>
i would like the ask the community about VoIP encryption,
currently in few middle east countries VoIP is officially
blocked. The isp are so aggressive that they use all sorts of
fancy tools to block it including skype calls, whatsapp calls
etc and are very successful in doing it. So far companies like
voipswitch and recently few others have been providing tunneling
mechanisms to get over this but recently UDP traffic is heavily
filtered and they go to the extreme of checking packet length
and pattern and artificially introduce delay, jitter or simply
block it if the number of hits are high. Switching to TLS/SRTP
also doesnt help, it works with some isp but as soon as you try
same using mobile data it stops working coz they match packet
length and block based on the profile. ZRTP doesnt work coz a
normal RTP streams needs to start and then it starts encrypting
it but those initial RTP get blocked.<br>
<br>
With lack of any more VoIP encryption protocols its almost
getting impossible to bypass block so has anyone have any ideas
of any other modern form of encryption which can be used for
VoIP (btw VPN are also blocked and more over if packet size
increases then nothing works on mobile data).<br>
<br>
The market demand of skype replacements is also extremely high
coz skype, hangouts, whatsapp video, instagram video, viber etc
etc, u name it and its blocked.<br>
<br>
</span></span>
<div class="m_-5392227457241306863moz-signature">-- <br>
Regards,<br>
Bipin<br>
<br>
<br>
</div>
</div>
<br><br><br>---------- Forwarded message ----------<br>From: Bipin Patel via FreeSWITCH-users <<a href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.freeswitch.org</a>><br>To: FreeSWITCH Users Help <<a href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.freeswitch.org</a>><br>Cc: <br>Bcc: <br>Date: Tue, 19 Feb 2019 08:53:29 -0800 (PST)<br>Subject: [Freeswitch-users] VoIP encryption recommendations<br>_________________________________________________________________________<br>
Professional FreeSWITCH Services<br>
<a href="mailto:sales@freeswitch.com" target="_blank">sales@freeswitch.com</a><br>
<a href="https://freeswitch.com" rel="noreferrer" target="_blank">https://freeswitch.com</a><br>
<br>
Official FreeSWITCH Sites<br>
<a href="https://freeswitch.com/oss" rel="noreferrer" target="_blank">https://freeswitch.com/oss</a><br>
<a href="https://freeswitch.org/confluence" rel="noreferrer" target="_blank">https://freeswitch.org/confluence</a><br>
<a href="https://cluecon.com" rel="noreferrer" target="_blank">https://cluecon.com</a><br>
<br>
FreeSWITCH-users mailing list<br>
<a href="mailto:FreeSWITCH-users@lists.freeswitch.org" target="_blank">FreeSWITCH-users@lists.freeswitch.org</a><br>
<a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users" rel="noreferrer" target="_blank">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a><br>
UNSUBSCRIBE:<a href="http://lists.freeswitch.org/mailman/options/freeswitch-users" rel="noreferrer" target="_blank">http://lists.freeswitch.org/mailman/options/freeswitch-users</a><br>
<a href="https://freeswitch.com" rel="noreferrer" target="_blank">https://freeswitch.com</a></blockquote></div>
</blockquote>
</div>
</div>
<!-- body end -->
</div><div dir="auto"><br></div>
</div></body>
</html>