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 > +86 592 2091112 >
