[Serusers] reuse of existing tcp connection

[Jiri Kuthan]

At 06:26 PM 10/16/2003, Juha Heinanen 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.

They don't even allow UDP replies?

-jiri