There is NO way the application itself can get through a NAT/PAT router. Most NAT/PAT routers are stateful, meaning that they won't allow a connection in that didn't originate from the inside. That is the main reason you need to make the NAT/PAT connection between the external IP(s) and the internal IP(s).
Your options all come down to the owner/administrator of the router opening up the ports. There are some fancy hacker tricks where you reconstruct packets with IPs that are mapped in the NAT table of the router, but it wouldn't work all the time, and probably wouldn't work well. Ken ---------- Original Message ---------------------------------- From: jpadpro 1 <[EMAIL PROTECTED]> Date: Mon, 2 Dec 2002 20:11:15 -0800 (PST) >Hello Jerry and Kenneth, > >Thanks for your Reply. > >Is there any other way, by which i can make the >application work. Will it work ,if i do some changes >in the code, so that when i run the Application it >will map for NAT/PAT ( in the Host Machines Router).. > >If YES, what all changes should be done and where?? > >Thankx in Advance.. > > > > >--- Jerry Westrick <[EMAIL PROTECTED]> wrote: >> You are leaving a lot open to assumptions, so the >> answer may be way off mark. But the short of it >> is: >> >> NO, it is (usually) not possible to INITIATE >> a TCP (nor UDP) connection from the out side of >> the NAT router, with out some sort of help from >> the router itself. >> >> Of course alot of my assumtions may (or may not) >> be true; so this answer my or maynot be true... >> >> Jerry >> >> >> >> On Mon, 2002-12-02 at 11:39, jpadpro 1 wrote: >> > Hi All, >> > >> > What i want to know is : Is it possible to connect >> to >> > the Host which is behind NAT and the Router is not >> > configured for NAT/PAT.. >> > >> > I tried to connect to my Host Machine which is >> behind >> > NAT ( Router is not configured for NAT/PAT) and i >> > tried to connect to my Host Machine from my home, >> it >> > is not working. What all changes do i need to make >> in >> > order to connect to my Host machine.. >> > >> > Thankx in Advance.. >> > >> > >> > __________________________________________________ >> > Do you Yahoo!? >> > Yahoo! Mail Plus - Powerful. Affordable. Sign up >> now. >> > http://mailplus.yahoo.com >> > _______________________________________________ >> > VNC-List mailing list >> > [EMAIL PROTECTED] >> > http://www.realvnc.com/mailman/listinfo/vnc-list >> _______________________________________________ >> VNC-List mailing list >> [EMAIL PROTECTED] >> http://www.realvnc.com/mailman/listinfo/vnc-list > > >__________________________________________________ >Do you Yahoo!? >Yahoo! Mail Plus - Powerful. Affordable. Sign up now. >http://mailplus.yahoo.com _______________________________________________ VNC-List mailing list [EMAIL PROTECTED] http://www.realvnc.com/mailman/listinfo/vnc-list
