Chris, what you want to configure is a "traversal zone". There is a diagram and 2 config snippets on the gnugk.org website (manual chapter 10.4 and 10.5): http://www.gnugk.org/gnugk-traversal.html http://www.gnugk.org/gnugk-manual-10.html#ss10.4 Regards, Jan -- Jan Willamowius, jan@xxxxxxxxxxxxxx, http://www.gnugk.org/ Chris Partsenidis wrote: > Hi Joe, > > I've worked with the SX20 for 2 months now as I got it as a 'demo' from > Cisco Systems and sent it out to a couple of customers so they can see it. > > While I plan to write about this experience on my website, firewall.cx, here > is how the story goes: > > According to Cisco, if you want to use the SX20 directly for internal > conferencing (lan to lan, or via leased line) it will work without a > problem, You can have two sx20's and they can perfectly communicate via sip > or h323. > > The first question here that usually arises in mind is 'what if I want to > use a client that's on a laptop or PC?' Ask Cisco and they'll tell you that > you must purchase CUCM (CallManager) + Presence sever, so that users can > install Cisco Jabber and log into CUCM. The sx20 can then also register to > CUCM and users can make conference calls..... > > If you try to search for video conference clients, you'll quickly discover > that all of these clients need to register to a Gatekeeper or some type of > server in order to make calls - a scenario that doesn't work well for > intra-site video conference calls. > > After much searching and multiple conversations with the Cisco TAC teams, I > finally found possibly the only type of software that will allow you to make > a video conference call directly to the SX20 (or any other VC system) using > an IP address only and does not require registration with any VC server. > The answer is polycom's Polycom RealPresence Desktop software. This is > perhaps one of the best VC clients out of the 17 I've tried and the only one > that supported direct video conference calls without registration. You run > the software and provide the IP address to which you want to make the call > and it works. > > The software costs around 70 euros for Windows/MAC clients and its also > available free of charge for smartphones. I tried it on my Samsung Galaxy > SII (Android) and it worked nicely. Supports application sharing, > 3-way/4-way video conferencing and more. > > Next questions is usually "What about if I want to make a VC to another > endpoint?". This is where it gets tricky, even for other VC endpoints. > Cisco tells you that you must have the Express Way servers installed on your > network. Express Way server C is placed in your internal network and Express > Way Server E in your DMZ. They take care of dynamically opening > ports/sessions with your remote clients. > > The other alternative is to place the SX20 directly on the Internet with a > Static Public IP address. In this setup, the SX20 is capable of calling > other VC endpoints (video conference machines or software clients), however > the problem arises when the client is a Windows/MAC pc, because he is behind > a firewall in their own network (home / office etc). The solution I've > found and seems to work is this: The endpoint client can install Cisco's > Jabber Video , www.ciscojabbervideo.com, a free service that installs the > Cisco Jabber Video on the client. > > The SX20 will have no problem calling a Free Jabber video client - while > Cisco says its not official supported, it works and I've tried it. You just > tell the SX20 to call the client e.g user@xxxxxxxxxx and it makes the call. > You'll need to ensure some settings on the SX20 are properly configured (let > me know when the time comes so you can save yourself a lot of time and > trouble), however the Jabber video client will not be able to call the SX20 > unless it is registered to some Gatekeeper (Cisco Express Way/CUCM) or the > GnuGk gateway (which is what I'd like to try). > > Another thing I tried, and worked, is the following: > Placed the SX20 in a DMZ zone ( with a private IP address) and using my PC, > I connected to the office's VPN and placed a direct call to the SX20's > private IP using the Polycom RealPresence Desktop client. This also works > without a problem. > > Since it has been confirmed that the SX20 can and will work with GnuGK, all > that's left is for someone to provide us with a sample/working configuration > so we can set it up and test it. If this works, I'll be writing a full > article on Firewall.cx and Cisco's Support Forums (to which we also > contribute) to help make the public aware of these inexpensive alternatives. > > > If someone can also take the time to help me get a working GnuGK, it would > be highly appreciated. > > Hope I've helped clear things up with the above and please excuse me if I > 'talk' to much - I just feel that knowledge and experience must be shared > with the rest of the world and let others benefit from it. > > Chris. ------------------------------------------------------------------------------ Flow-based real-time traffic analytics software. Cisco certified tool. Monitor traffic, SLAs, QoS, Medianet, WAAS etc. with NetFlow Analyzer Customize your own dashboards, set traffic alerts and generate reports. Network behavioral analysis & security monitoring. All-in-one tool. http://pubads.g.doubleclick.net/gampad/clk?id=126839071&iu=/4140/ostg.clktrk _______________________________________________________ Posting: mailto:Openh323gk-users@xxxxxxxxxxxxxxxxxxxxx Archive: http://sourceforge.net/mailarchive/forum.php?forum_name=openh323gk-users Unsubscribe: http://lists.sourceforge.net/lists/listinfo/openh323gk-users Homepage: http://www.gnugk.org/
