client connects to
http://se.rv.er.ip:5800/

webrowser connects to 5800   [not port 80]
java starts ... java client connects to 5900 transparently
server firewall must allow 5800 and 5900 for server side

nothing to be done on client side unless restrictive firewall exists
client side ;-)

can client telnet to 
 serverip 5900
and get a response?


L.M. wrote:

>Hello,
>
>Suppose the situation is the following:
>----------------------------------------------
>- running VNC server on host A (network A),
>- running VNC client using an "Internet browser"L.M. <[EMAIL PROTECTED]>
>  and the "Java Runtime Environment" on host B
>  (network B).
>
>
>Problem:
>-----------
>HOW and WHY host B or its network (network B)
>could prevent host B from connecting to the VNC server on host A?
>Which could be the reasons?
>
>  - Could the "Java Runtime Environment" be responsible for that?
>  - Could it be because the VNC client on host B uses ports other
>    than port 80 to communicate with the VNC server on host A?
>    (Does the client also uses ports 5800 and 5900?)
>  - In other words, are there any requirements on the client other
>    than having an "Internet browser" and a "Java Runtime Environment"
>    available?
>
>I am only interested on the client side of the communication
>(suppose everything is OK on the server side: no firewall, etc.).
>
>Please help!
>
>Thanks in advance,
>
>--
>Leon
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