Dave, thank you for all the advice, I will look into all of it for sure,

about the Telnet Application: I recall seeing one at sourceforge.net.

Hope that helps.

On Wed, Mar 5, 2008 at 4:05 PM, Dave Baxter <[EMAIL PROTECTED]> wrote:

> Hmmmm....
>
> Probably right, Hamachi run's on full blown Windows (NT based), Linux or
> Apple systems.   Guess in principle it could run on something else, but
> it's not open source.....
>
> Take a look at Tinc.  That is an open source VPN system.  Maybe that
> could be adapted to your needs?  http://www.tinc-vpn.org/
>
> I don't know much about the mobile platform arena, but from my own
> experiments and other messings, though UDP is easier to program (at
> least I find it so) TCP is better at maintaining links, especaily
> through multiple routers and firewall's etc.
>
> If you have control of the routers in question, it's not dificult to
> manualy setup port forwarding of course, and there is the questionable
> UPnP protocol where an "Application" can do it for itself.  But, that
> can also allow some very bad things to happen in regard to network
> security.
>
> As you obviously know more about the mobile environment than I do, I'll
> bow out now.  But with one question in return...
>
> Do you (or anyone else) know of a generic Telnet client for phones like
> the N6110?  It'd be so usefull......
>
> Cheers.
>
> Dave B.
>
>
> > -----Original Message-----
> > From: wayne forrest [mailto:[EMAIL PROTECTED]
> > Sent: Wednesday, March 05, 2008 7:06 AM
> > To: ICS support mailing
> > Subject: Re: [twsocket] UDP Hole Punching
> >
> > Dave, maybe I as not all that clear on my Specification:
> >
> > My ICS Clients will be Mobile PHones MIDP2.0, therefor I do
> > not think Hamatchi will work, or would it ?
> >
> > On Tue, Mar 4, 2008 at 4:10 PM, Dave Baxter <[EMAIL PROTECTED]> wrote:
> >
> > > "NAT Traversal" is well documented, but "less than easy" to
> > make work
> > > from scratch....
> > >
> > > But why bother rolling your own?  Just download and use Hamachi.
> > > (Google for it)  Even the free one will start automaticaly when
> > > Winderz boots, then you have a UDP based secure VPN between
> > 2 (or more) sites.
> > > Just about any LAN type app will run across it.  (Versions for
> > > Winders, Linux, and some Apple OSwhatsit type things)
> > >
> > > Works very well.  I have no affiliation with Hamachi or
> > LogMeIn, just
> > > a very satisfied user of the free version so I can get to my home
> > > Win2k desktop securely wherever I am, and leaving no unwanted holes
> > > poked in the firewall.
> > >
> > > Cheers.
> > >
> > > Dave.
> > >
> > >
> > > > -----Original Message-----
> > > > From: JLIST [mailto:[EMAIL PROTECTED]
> > > > Sent: Saturday, February 23, 2008 8:45 AM
> > > > To: ICS support mailing
> > > > Subject: Re: [twsocket] UDP Hole Punching
> > > >
> > > > My understanding is that it works on certain types of NAT
> > firewalls.
> > > > On these NATs, an external port is mapped to an internal IP:Port.
> > > > If this is the case, all packets going to that external
> > port will go
> > > > to the internet IP:Port.
> > > >
> > > > Making it work is not that simple though, with the difficult part
> > > > being coordinating two parties that do not talk to each other.
> > > > I'm not sure what's being used in real life solutions but
> > it sounds
> > > > to me that both A and B have to have very frequent UDP
> > > > communications with S, or have a TCP connection with S in
> > order to
> > > > coordinate a hole punching attempt.
> > > >
> > > > > Isn't the translation state based on the remote peer IP
> > > > address, too?
> > > > > Then the same translation created for A-S and B-S would not
> > > > work when
> > > > > you try to connect directly A with B.
> > > >
> > > > > ----- Original Message -----
> > > > > From: "wayne forrest" <[EMAIL PROTECTED]>
> > > > > To: "ICS support mailing" <twsocket@elists.org>
> > > > > Sent: Thursday, February 21, 2008 8:22 PM
> > > > > Subject: [twsocket] UDP Hole Punching
> > > >
> > > >
> > > > >> Has any one made a UDP Hole puncher with ICS ?
> > > > >>
> > > > >> Let A and B be the two hosts, each in its own private
> > > > network; N1 and N2
> > > > > are
> > > > >> the two NAT devices; S is a public server with a
> > > > well-known globally
> > > > >> reachable IP address.
> > > > >>
> > > > >>    1. A and B each begin a UDP conversation with S; the
> > > > NAT devices N1
> > > > >>    and N2 create UDP translation states and assign
> > > > temporary external port
> > > > >>    numbers
> > > > >>    2. S relays these port numbers back to A and B
> > > > >>    3. A and B contact each others' NAT devices directly on
> > > > the translated
> > > > >>    ports; the NAT devices use the previously created
> > > > translation states
> > > > > and
> > > > >>    send the packets to A and B
> > > > >>
> > > > >> If I were to implement the above, is it really that simple?
> > > > >>
> > > > >> or is there much more to it than that ?
> > > > >>
> > > > >> Any help appreciated, or alternatives, maybe a plugin /
> > > > generic solution
> > > > >> that can be incorporated.
> > > > >>
> > > > >> Our current setup is "Server on PC behind nat" and then
> > > > client on Cell
> > > > >> phone.
> > > > >>
> > > > >> We will have a lot of users not knowing how to do port
> > forwarding.
> > > >
> > > >
> > > >
> > > >
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