Hi Michal, thx for quick answer but allow two more questions. why the gnugk is using port 502(1)!!! + (some ports in the range) if i specify only a range from 5000-502(0)!!! could there be a failure in the allocation logic? imho the last port should be 5020 not 5021 ? how log it takes that gnugk allocate the used ports again ? for point 3 i will try to setup a dmz to figure out if it depends on the router. (fyi tunneling and fast start are on ) which port ranges would you recommend for at least 5 clients at the proxy? (for security reasons i am looking for a minimum, because on some routers you have to open the ports explicitly) thx in advance TOM ----- Original Message ----- From: "Zygmuntowicz Michal" <m.zygmuntowicz@xxxxxxx> To: <openh323gk-users@xxxxxxxxxxxxxxxxxxxxx> Sent: Friday, January 28, 2005 7:36 PM Subject: Re: minimum set of ports for proxy use > 1. RTP protocol always uses two port - one even and one odd, so the ports > are always > allocated in pairs, like 5000-5001, 5002-5003. > 2. Similar to 1. - proxying a signaling channel requires at least two > sockets, plus two another, > if tunneling is disabled. > 3. Make sure H.245 tunneling is turned on and, for NAT travesal, it often > depends on who > is sending media first. A backpath for UDP packets is opened only after > a NATed endpoint > sends the first UDP packet. > > PS: I would not recommend using so narrow port ranges. Sockets are sometimes > deleted with some > delay after a connection is closed, so you may run out of socket with full > proxy utilization. > > ----- Original Message ----- > From: "Raschel" <raschel@xxxxxx> > Sent: Friday, January 28, 2005 6:04 PM > > > i try at the moment to figure out what is the minimum port requiremnet for > proxy use and some other stuff. > > i use the 2.2.1-2 executable for linux with two network cards. > > the proxy is on private ip behind a nat router and the second interface is > connected to another private ip. the proxy act as a child gk with a parent > gk at public IP. > > now i have setup the RTP port range at the proxy section from 5000 - 5020. > > the strange thing is that the proxy use for every seperate connection > another 4 ports (audio + video) e.g. 5000- 5003 next 5004 - 5007 and if i > place some calls at the end it use 5021 + some ports e.g. 5006-5008. > > 1.) > why does the gnugk use 5021 if i specify the range only from 5000 - 5020 ? > > 2.) > why the gnugk increment for each call the next 4 ports ? > the same i saw for Q931 port range usage. > > 3.) > if i place a call from outside (phone which is connected to the parent gk to > phone which is at the child gk) the connection (audio + video) is > established at once on both side. > > but if i place a call from the phone behind the child gk to a phone which is > connect outside at the parent gk, the outside phone establish the connection > at once and the inside phone take up to 2-3 seconds to establish audio and > video. > > 4.) > the child gk still crash if i have a nat router reconnection (with new > public IP) if it tries to reregister with the parent gk. > the parent gk sends a RRQ reject with request for full registration and than > the proxy die. > > please help and give some hints > > thx > TOM > > > > ------------------------------------------------------- > This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting > Tool for open source databases. Create drag-&-drop reports. Save time > by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. > Download a FREE copy at http://www.intelliview.com/go/osdn_nl > > _______________________________________________________ > > List: Openh323gk-users@xxxxxxxxxxxxxxxxxxxxx > Archive: http://sourceforge.net/mailarchive/forum.php?forum_id=8549 > Homepage: http://www.gnugk.org/ > ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________________ List: Openh323gk-users@xxxxxxxxxxxxxxxxxxxxx Archive: http://sourceforge.net/mailarchive/forum.php?forum_id…49 Homepage: http://www.gnugk.org/
