port mapping Post: 302359964

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Special Forums IP Networking port mapping Post 302359964 by kallquk on Wednesday 7th of October 2009 08:50:28 PM

10-07-2009

Registered User

port mapping

Hello to all!

I am new to this interesting forum. My questions is not totally related to unix/linux systems, but I am not finding proper place where to make my question and this forum seems to be visited by experts and unix/linux experts are epxerts in everything

My ISP has two kinds of services: with and without real IPs that have big diference in monthly price, and usually is selected the without real IP. These clients have problems with peer internet aplications and cannot be accessed remotely eg from terminal etc. The ISP says that it does not "block" any port, but simply a specific client or better say a private IP(may be thousands) is not identified from outside, behind ISP's nat, router or firewall.
The ISP does not make static port forwarding under request, in this case it recommends the customer to take the other service.

My question is:

Knowing private and real IP, can I make a TEMPORARY port forwarding using a port that is unused at that moment, from the connection to ISP only ?

There are continuosly created IP translations and port mappings in ISP Servers during browsing, where html pages reach that IP that requested them between thousand of connected clients, how to create a such explicit rule by my own that has a temporary value time, eg it is deleted when I shut down the pc and IP is unassigned. ?

ISP may not use unix/linux,

thanks in advance

kallquk

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LEARN ABOUT XFREE86

xvgrabport

XvGrabPort(3X)															    XvGrabPort(3X)

Name
       XvGrabPort - lock port for exclusive use by client

Syntax
       #include <X11/extensions/Xvlib.h>

       XvGrabPort(dpy, port, time)

       Display *dpy;
       XvPortID port;
       Time time;

Arguments
       dpy     Specifies the display screen on which the Xv Server is to accept requests from Xv clients.  If the display option is not specified,
	       Xv uses the display screen specified by your DISPLAY environment variable.  The display	option	has  the  format  hostname:number.
	       Using two colons (::) instead of one (:) indicates that DECnet is to be used for transport.

       port    Defines the port to be grabbed.

       time    Specifies the request timestamp.

Description
       XvGrabPort(3X) grabs a port.  Once a client grabs a port, only that client can make video requests to that port.

       If  the	time  is  before  the  current port time, the XvGrabPort request is ignored and XvInvalidTime is returned.  If the port is already
       grabbed by another client, XvAlreadyGrabbed is returned. Otherwise it returns a status of Success.  The port time is updated when the  fol-
       lowing requests are processed: XvGrabPort(3X), XvUngrabPort(3X), XvPutVideo(3X), XvPutStill(3X), XvGetVideo(3X), XvGetStill(3X).

       If  the port is actively processing video for another client, the video is preempted, and an XvVideoNotify event with detail XvPreempted is
       generated for its drawable.

Returned Values
       [Success]
	       Returned if XvGrabPort(3X) completed successfully.

       [XvInvalidTime]
	       Returned if requested time is older than the current port time.

       [XvAlreadyGrabbed]
	       Returned if the port is already grabbed by another client.

       [XvBadExtension]
	       Returned if the Xv extension is unavailable.

       [XvBadAlloc]
	       Returned if XvGrabPort(3X) failed to allocate memory to process the request.

Diagnostics
       [XvBadPort]    Generated if the requested port does not exist.

See Also
       XvUngrabPort(3X) XvVideoNotify(3X)

XFree86 							   Version 4.7.0						    XvGrabPort(3X)