[Serusers] reuse of existing tcp connection

[Andrei Pelinescu-Onciul]

On Oct 16, 2003 at 19:26, Juha Heinanen <jh at tutpro.com> wrote:
> Jiri Kuthan writes:
> 
>  > other way of dealing with NATs is use of nathelper -- nathelper can
>  > send keep-alive messages to natted clients.
> 
> jiri,
> 
> this has nothing to do with nated hosts, my gprs provider gives me a
> globally unique ip address.  because they charge per mbyte and want to
> "protect" me, they don't allow anyone from outside to establish tcp
> connection to me or send any unsolicited udp packets to me.  therefore,
> the only way i can get sip presence and instant message applications to
> work, is that ser uses the same tcp connection that i have established
> for all requests sent to me.

In this case if we don't care so much about security and you are
interested only in the port number, we can add a compilation or runtime
option to accept aliases only for ports and without any security checks
(this means someone from the same host can hijack your connection).

Andrei