[Freeswitch-users] How to register sip phone in VOIP Disabled Areas

[Cal Leeming [Simplicity Media Ltd]]

Alex makes a valid point, success depends completely on the method they are
using to block SIP traffic.

If they have DPI, then you can try using any number of VPN services to
tunnel your SIP traffic (there are literally hundreds of them, though
personally I find VyprVPN to be quite good).

If your equipment is hardware then you'll need a router/gateway which
supports tunnelling traffic (ipsec, openvpn, l2tp, pptp etc), or use some
routing trickery by changing the default gateway on the phone to use your
computer then set up your computer with ICS (internet connection sharing),
assuming you are using Windows, or DNAT if you are using *nix via iptables.
Some hardware phones may also allow you to connect via a VPN.

Hope this helps

Cal


On Tue, Dec 24, 2013 at 6:15 PM, Alex Balashov <abalashov at evaristesys.com>wrote:

> On 12/24/2013 01:06 PM, Privus 007 wrote:
>
> > Besides changing to a non standard port (ie. not using 5060), you could
> > also try to use TLS transport instead of UDP. If signaling traffic is
> > encrypted, it has a better chance of punching through any firewall.
>
> That depends on how it's being blocked.  If it's being blocked crudely,
> on a port level, then they'll just block SIP-TLS (5061) too.  If it's
> being blocked by DPI that identifies the packets as SIP, then switching
> the utilised ports won't work, and, in fact, encryption and/or tunneling
> is the only way around it at all.
>
> --
> Alex Balashov - Principal
> Evariste Systems LLC
> 235 E Ponce de Leon Ave
> Suite 106
> Decatur, GA 30030
> United States
> Tel: +1-678-954-0670
> Web: http://www.evaristesys.com/, http://www.alexbalashov.com/
>
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