Yes it uses push notifications as well.
Has anyone used or heard of these guys:
https://sessiontalk.co.uk/sip-voip-tunnel/

Looks interesting.

Regards
Michael Knill

On 9/6/20, 8:05 pm, "Michael Keuter" <[email protected]> wrote:



    > Am 09.06.2020 um 12:00 schrieb Michael Knill 
<[email protected]>:
    > 
    > Hi Michael
    > 
    > Yes I have used Bria with Wireguard on iPhone and it works great while 
its in the foreground.
    > Push notifications are the only option to wake up the application from 
the background which don't work if you are using VPN.
    > 
    > Regards
    > Michael Knill

    But this behavior is dependend on the smartphones operating system, right?
    Does the 3CX smartphone app behave different?

    > On 9/6/20, 7:08 pm, "Michael Keuter" <[email protected]> wrote:
    > 
    > 
    > 
    >> Am 09.06.2020 um 10:04 schrieb Michael Knill 
<[email protected]>:
    >> 
    >> Hi Group
    >> 
    >> Well although we are coping fine during COVID-19 and haven’t really lost 
any business yet, its now only a matter of time that we will.
    >> I'm getting increased pressure from clients that they need simple remote 
working solutions for both desktop and smartphone as they are suspecting the 
new norm will not be everyone sitting in the office with a phone on their desk.
    >> 
    >> In the light of this, I am struggling to build something for an standard 
Asterisk based system that's going to be moderately secure. Yes OpenVPN from 
Yealink phones is awesome but its not a mobile solution and people are sick of 
bringing phones into the office and back home.
    >> 
    >> 3CX has a nice remote client and it looks like I'm going to lose at 
least one customer to this product. Its easy to set up and appears to do it 
more securely via a tunnelling protocol.
    >> Bria is great but I just don't know how to secure it other than using a 
VPN.
    >> 
    >> Does anyone have any ideas before I start using 3CX to keep business?
    >> 
    >> Regards
    >> 
    >> Michael Knill
    > 
    >    Hi Michael,
    > 
    >    I just looked into the 3CX Windows softphone. You are right, they are 
using a special proprietary tunnel protocol to their own SBC on port 5090.
    > 
    >    https://www.3cx.com/docs/3cx-tunnel-session-border-controller/
    > 
    >    https://www.3cx.com/docs/3cx-sbc-raspberry-pi/
    > 
    >    But it seems everyone is using the same Tunnel password (no user 
authentiation for the tunnel!). So if one user is hacked or lost its device, 
then you would need to reconfigure the tunnel with a new password for all 
users. I personally would not want this, but I don't know the exact details of 
the tunnel.
    > 
    >    You can do the same, but much safer with OpenVPN or WireGuard. It's a 
bit more work to setup the client on each device. WireGuard works fine on 
mobile phones.
    > 
    >    Otherwise you just use SIP over TLS with SRTP without a VPN.
    > 
    >    Michael
    > 
    >    http://www.mksolutions.info
    > 
    > 
    > 
    > 
    > 
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    > 
    > _______________________________________________
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[email protected].


    Michael

    http://www.mksolutions.info





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