Re: [gentoo-user] VOIP solution?

[deface]

Your better off to use a VPN device to hold the connection across the 2
offices. If your connection is extremely crap; then you'll need to
upgrade to a better service provider. As far as your windows vpn issue,
the device is not hidden; you just built your vpn connection wrong. you
need to remove the option to use the remote host as a gateway, this will
allow you to use your local interface for dns routing, not the other
side.


On Fri, 2007-03-23 at 10:40 +0800, Zhang Weiwu wrote:

> Dear List
>
> We are a tiny business running in China. In China ISP competition is not
> very healthy, 2 major ISPs: China Telcom, China Netcom both defend their
> own business by limiting network access to other ISP.
>
> We have an office in Beijing, in Beijing there is only one ISP company
> (monoplay business) that is China Netcom so they "choose" to use it.
> We have an office in Xiamen, in Xiamen there is only one ISP company
> (monoplay business) that is China Telcom, so we "choose" to use it.
> We also have a server hosted by a hosting company, that company is very
> smart, using some very special technology to connect both ISP.
>
> Transfer data from our Xiamen Office to Beijing => 3 ~ 10 KB/s, no
> connection can maintain 10 minutes. Transfer data from Beijing to Xiamen
> is the same slow.
>
> In Xiamen, transfer data from / to our server is 100KB/s; in Beijing
> exactly the same.
>
> We used to use skype, but quality isn't very high nor very realiable
> because only a few super-nodes have fast access to both ISP. Besides we
> got a few other problems too related to skype / gizmo.
>
> I am thinking perhaps it's not difficult to set up some software on the
> server that do the "routing", e.g. it serve as a call center that both
> office login to a VOIP software and it connects to the server, the
> server talk to both sides. This is the fastest solution and it should
> work. That's only my imagination, I am still searching for such
> software.
>
> Both offices use OpenSuSE as desktop computer and the server runs Gentoo
> Linux. Both offices are behind each one's NAT firewall.
>
> Any suggestions on a VOIP solution for our office?
>
> P.S.
>
> Certainly THIS would work: set up VPN on the server and both office dial
> into the VPN before they start to use some SIP software. This can solve
> the problem, but I think it's over complicated.
>
> Besides, I never tried VPN on Linux, only did it on Windows: on windows
> the downside is once a host has dialed up VPN, local network connection
> is "hidden" for it, that I can no longer access the hosts in the same
> office that has not yet dialed in the same VPN. This is not acceptable
> for us.
> --
> Zhang Weiwu
> Real Softservice
> http://www.realss.com
> [phone]
>