Re: [Openh323gk-developer] Not Getting Dialing tone on NAT ed End point

[Simon H. <sh...@is...>]

The solution is to use a GnuGK Nat aware client.

GnuGK has a very good NAT assist feature to assist in traversing NATs, it 
is mainly used for GK-GK traversal,  For just a client behind a NAT you 
will need a special client to be able to send and receive calls from behind 
a NAT box with GnuGK.

How it works:
The GnuGK signals the NATed EP that it is behind a NAT and the NAT'd EP 
opens a signalling port to GnuGK for which to receive call signalling, Once 
a incoming call is received it is sent through the signaling port and the 
NAT'd EP then sends out 2 UDP ports to the GnuGK.

I recently included such support into a windows softphone, PacPhone 
(www.pacphone.com)  and it works rather well.
Note: It is a system tray application, click on the icon in the system tray 
(bottom right) to bring up the dialer.  right click to bring up the menu. 
also it does take a few seconds to load so be patient :). There is 
absolutely no special settings required, it is completely automatic.

I have also added the baseline support to OpenH323 and hopefully will get 
some time to add it to MyPhone in the coming months when I relaunch the 
project.

If anyone have any questions, let me know off list.

Simon

At 08:28 AM 30/11/2005, you wrote:
>Hi Rumel,
>
>This type of request should be posted to openh323gk-users -- it is not
>a development issue.
>
>You are not getting incoming audio before Connect, because the NAT
>box doesn't know where on the private LAN to send the RTP packets.
>
>If you can configure the endpoint to send outgoing RTP during Progress,
>then gnugk will reply on the same port and the NAT will work properly.
>
>Or, if you have only one endpoint behind a given NAT, configure the
>NAT to forward the UDP ports that the endpoint uses for RTP to that
>endpoint.  If it is not a security problem, it may be simplest to put
>the endpoint in the DMZ.
>
>Or, you could configure the gateway to send Connect when it initiates
>the call (may be incompatible with how you do billing, etc.)
>
>Or, you may be able to configure the gateway to send Alerting instead
>of Progress, which will cause the endpoint to generate a local ringing
>tone.  Try this only as a last resort, because the caller won't be able
>to hear announcements that a number has been changed, etc.
>
>--Stewart
>
>----- Original Message -----
>From: Maksudul Karim
>To: ope...@li...
>Sent: Tuesday, November 29, 2005 2:00 PM
>Subject: [Openh323gk-developer] Not Getting Dialing tone on NAT ed End point
>
>
>hi everybody,
>
>currently i fatch a problem,my network diagram is as follows.....
>
>
>
>                                      |------------->Gateway2--->pstn Network
>                                      |
>                                      | 
> --------------
>privateIP  DHCP Natbox   |                         |               |
>  ----      ----                      |                          |
>|
>|    |-----|    |--------->internet backbone<-------  |  gnugk    |
>  ----      -----                                            |   |
>|
>                                                             |   |
>|
>
>                                                          | 
> -----------------
>                                                             |
>                                     ;                         |
>
>|---------->Gateway1---pstn network
>
>
>Gateway1 and gnugk are in under same isp but deferent subnet of public ip.
>Gateway2 is in seperate isp with public ip.
>
>when any one/end point call from dialup with public ip can get dialing 
>tone and
>can talk.
>
>when any one/end point call from private ip behind DHCP nat box from diffrent
>isp don't get ring tone/dialing tone but when remote end receive call then 
>both
>end can get each other.so the dialing end can't get response his call is 
>dialing
>or not.
>
>My config file's routing part is configered as follows....
>
>[RoutedMode]
>GKRouted=1
>H245Routed=1
>CallSignalPort=0
>CallSignalHandlerNumber=1
>RtpHandlerNumber=1
>AcceptNeighborsCalls=1
>RemoveH245AddressOnTunneling=1
>DropCallsByReleaseComplete=1
>AcceptUnregisteredCalls=0
>SupportNATedEndpoints=1
>SendReleaseCompleteOnDRQ=1
>
>[Proxy]
>Enable=1
>ProxyForNAT=1
>
>can any one tell me how can i solve this issue,is it the problem of gnugk
>settings or the gk backbone ?
>
>thank you
>rumel
>
>Send instant messages to your online friends http://uk.messenger.yahoo.com
>
>
>
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