[MPlayer-users] about the mms:// support/problems Fwd: Re: Re: [MPlayer-dev-eng] [BUG] in mms support

[Georgi Georgiev]

On Sun, May 26, 2002 at 02:08:39PM +0200, Felix Buenemann wrote:
> > > > Hm, I am DNAT-ing ports 7070 and 7071 UDP from my router to my
> > > > workstation. RealPlayer seemed to be using them... no problems. Maybe
> > > > the mms protocol is a bit different, just like the problems I had with
> > > > ohphone (from openh323.org) because the IP address was exchanged during
> > > > the communication and no NAT-ing could do the trick. Cannot test though
> > > > - Linux only.
> > >
> > > using DNAT helps, BUT only for a single computer, so not multiple systems
> > > behind a NAT/Masq-Router can use it, unless there are special
> > > masquerading modules, which are rarely available especially for iptables.
> >
> > Took me a while to figure out what you mean, but I guess it is that with
> > the mms protocol we don't have a choice of a UDP port?  Unfortunately I do
> > not understand things as well as I wish, and it is not clear to me why a
> > UDP port cannot be negotiated rather than having it fixed (having in mind
> > that I am a *CLIENT*). Or maybe I am talking nonsense...
> you are :) I just pinted out that DNAT only can forward a specific port to 
> _one_ host behind the router, which is a problem if you have multiple hosts 
> behind the firewall that want to use the service that is portforwarded.
> However there is a workaround to this as some software allows to speicify the 
> port range to use, so you could give each client a specific port range and 
> DNAT that range to the respective hosts.
And that's what I had in mind when I said that "with the mms protocol we don't
have a choice of a UDP port?"
> However DNAT is always a mess!
Agreed here. It IS a mess.

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| Georgi Georgiev    (-<     | I have accepted Provolone into my life!    |
| chutz at chubaka.net  /\   .o)|                                            |
| +81(90)6266-1163  V_/_ |(/)|                                            |
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