[plug] VOIP suggestions please

[Kev]

Brad Campbell wrote:
> G'day all,
> 
> I'm making my 1st steps into the wonderful world of VOIP.
> I need a secure channel from wherever I may be on the planet back to 
> home base in Perth.
> 
> What I have atm is a wonderfully working openvpn setup where I have a 
> machine tucked away in the corner in Aus that has an openvpn tunnel back 
> to my machine in dxb.
> 
> I've tried playing with SJPhone and doing local lan type calls.. all 
> groovy..
> My issue is the network down there is 192.168.0.0/24 and my openvpn 
> network is 10.8.0.0/24.
> 
> I *thought* (wrongly it would appear) that I could just add some 
> iptables dnat rules on the box down there to forward some ports from the 
> 192.168.0.0/24 interface across my vpn and I'd have noise..
> 
> However, showing my complete ignorance in all things VOIP it was not to be.
> Are there any linux/windows voip clients that just work on a single 
> port? or can be restricted to a smaller range of ports for the RTP 
> connection? Failing that.. any good advice on a small proxy that might 
> run on the box in Perth for h323 or sip and perhaps a link for a good 
> howto site?
> 
> Everything I've read thus far has really just confused me further. all I 
> want to do is make a call from 10.8.0.10 to a windows machine on the lan 
> down there on the 192.168.0.0/24 subnet.
> I don't have control over the routes on the windows boxes, so I can't 
> tell them how to get to the 10.8.0.0/24 subnet.. I really need to make 
> the local interface look like it's the one making the call I guess.
> 
> 
> While I'm on the line... heres a groovy tip I stumbled over while 
> needing to do a remote knoppix install behind a NAT device I could not 
> punch a hole through driven by someone who needed extreme hand holding..
> 
> use a reverse port map in ssh..
> 
> put knoppix disk in drive
> type knoppix 2 at bootprompt
> type passwd
> enter new password "password" twice
> type /etc/init.d/ssh start
> type ssh -R 2224:*:22 brad at myhosthere.com
> when it asks about unknown host type "yes"
> type the password
> 
> then from my machine...
> ssh -p 2224 localhost
> 
> Boom.. I'm in :)
> 
> Do that with a windows install CD!
> 
> Brad (hugging his knoppix disk)

I have absolutely no idea about how secure it is, but Skype comes in 
both Wintendo and Linux flavours, and it "just works".  I, my family and 
friends use it all the time.  Skype to Skype calls are free from 
anywhere on the globe.

Cheers
Kev



-- 
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Kev Downes
kdownes at tpg.com.au  ph 0404 7 0808 2
We use and recommend Xandros 3.0.2
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