[AusNOG] Remote Work - (SIP/Security/CGNAT)

[Matt Richards]

We too have staff in Manila. The phones in our Manila office (Eastern 
Telecom) and also staff homes (PLDT) talk just fine to our Sydney PBX.

Our SIP server is open to the world, but there's nothing wrong with that 
as long as you have appropriate security in place (strong passwords, 
fail2ban, etc).

Matt.

On 13/11/2015 12:12 p.m., Nick Stallman wrote:
> We have two staff in the Philippines to extend our phone support hours.
>
> We haven't really had any issues except them using the same 
> residential connection at the same time.
> We solved that one by one of them using SIP and the other using IAX. 
> IAX might solve some of your issues if you can use it.
>
> Our VoIP server is internet accessible however so we don't have 
> dynamic IP / VPN issues.
>
> On 13/11/15 09:59, Luke Iggleden wrote:
>> Hi Noggers,
>>
>> We've recently been tasked with assisting getting SIP running from 
>> Australia to the Philippines for remote staff workers on DSL tails. 
>> SIP server is in Sydney, behind Vocus transit.
>>
>> It appears that CGNAT is a hurdle, plus 350-450ms of latency, and the 
>> inability to obtain a static IP on a 'residential' grade tail.
>>
>> We're now using Fortigate SSL VPN tunnel as a solution, and just 
>> routing the SIP server down the split tunnel, but not sure if this 
>> really makes the situation worse or not, and I'm looking to hear 
>> other ideas and battle stories!
>>
>> What are people using out there to deliver a reliable service that 
>> sounds good? -plus:
>>
>> - Get around CGNat RTP Audio/SIP transport issues
>> - Ensure SIP server is not open to the world due to dynamic IP's 
>> connecting
>> - Keep the bandwidth requirements to a minimum - Assume low speed DSL 
>> (2M/512k)
>>
>> Direct carrier links are not a possibility unfortunately as the staff 
>> all work from home offices.
>>
>>
>>
>> Cheers,
>>
>> Luke
>>
>>
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>
> -- 
> Nick Stallman
> Technical Director
> Agentpoint Pty Ltd
> The Real Estate Web Developers
> Melbourne | Sydney | Miami
> nick at agentpoint.com
> www.agentpoint.com.au | www.zooproperty.com | www.ginga.com.au | 
> www.business2.com.au
>
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