Download a copy of NMAP and do a portscan on the firewalls.. No two firewalls
are all alike. This question is like asking ten million people "what does an
orange taste like to you" .. Everyone is different, thus everyone who
configures their firewall is different.. You say that this is for an audio
application you are doing, just put in a README file that states to open up a
certain port that you specify on your firewall for this application to work.
Chop Chop
On Tue, 08 Aug 2000, Marko Vukovic' wrote:
> Ahmed Matar wrote:
> >
> > I am in urgent need of the port numbers that are usually open on most
> > firewalls so that applications can transmit information to users on those
> > ports who are behind firewalls. As far as I know (correct me if I am wrong),
> > but most firewalls (e.g. Microsoft Proxy 2.0) have special ports open for
> > some well-known applications such as the RealPlayer and also have a number
> > of ports open for all other applications to use. I've been trying to find
> > these ports numbers on the net, but have not suceeded in doing so. Please if
> > anybody has this information please send it to me. The reason I'm asking
> > this question is because I am creating a application that plays streamed
> > audio transmitted to it from another application running on a remote
> > webserver. I want users behind firewalls to be able to use my application so
> > I need to know on what ports I can transmit my audio to the user (via UDP)
> > so that if he/she is behind a firewall, the audio will be received.
> >
> > Thanks a MILLION in advance,
> >
> > Ahmed
> >
> > -
> > [To unsubscribe, send mail to [EMAIL PROTECTED] with
> > "unsubscribe firewalls" in the body of the message.]
>
> Hi Ahmed,
>
> No firewall is going to allow you by default to just get directly at it's
> internal network. In a lot of cases, the firewall uses NAT (network address
> translation) so the outside world never knows what hosts are on the inside
> and for this reason, these types of connections are usually initiated from
> an internal host using some sort of gateway or proxy which is setup by
> the firewall admin for that particular service or via a generic or TCP relay
> from the firewall's external interface to an internal host
>
> PS: port scans are also not a good idea ;-)
>
> Regards,
> --
> Marko Vukovic' E-mail: [EMAIL PROTECTED]
> Technical Support, WWW: http://www.cequrux.com
> CEQURUX Technologies Phone: +27(21)423-6065
> Firewalls/VPN Specialists Fax: +27(21)424-3656
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