Re: bridge + nat

[George Alexandru Dragoi <waruiinu@gmail.com>]

False Alarm

There is no voip, it is  just that computer with a modem for fax
stuff, the friend who asked for help just told me. Anyway,it is good
to know i can't use the bridge that way. Thank you Anthony again

On Mon, 19 Jul 2004 20:32:55 +0300, George Alexandru Dragoi
<waruiinu@gmail.com> wrote:
> Somebody told methere are situations where you can specify to voip
> software(or hardware,  i have no ideea how voip works) which ip should
> expect to have for port forward situations. Well seems i have to stay
> with windows and winproxy who like to suggest to browsers to download
> index.html from google.com :), and no QoS.
> 
> Thank you for clarifying
> 
> 
> 
> On Mon, 19 Jul 2004 15:48:30 +0100, Antony Stone
> <antony@soft-solutions.co.uk> wrote:
> > On Monday 19 July 2004 3:31 pm, George Alexandru Dragoi wrote:
> >
> > > That is what i wanted to do, with 2 NICs to make a bridge between
> > > internet and the LAN, assign the public ip to one of the LAN machine,
> > > and prite ips to the rest of machines, and to hope it will work, seems
> > > not, i hoped i could do this.
> >
> > No.   With 2 NICs you can either bridge, or route, but not both.
> >
> > With 3 NICs you could bridge 2 of them together, and route between the bridged
> > pair and the 3rd NIC, however in this situation I think you would need to
> > have an IP address on the bridged pair, and you say you have only 1 public IP
> > address available?
> >
> > > If the voip hardware/software wont work
> > > in nat with port forward, i wont change there with linux.
> > > Maybe there is a suggestion for that voip, or if i can do this with 3
> > > NICs, and 1 single public IP.
> >
> > With only 1 public IP address I think you are stuck as soon as you assign that
> > address to any machine except the VoIP server.
> >
> > Why do people keep on coming up with protocols which don't work across NAT?
> >
> > NAT works at OSI layer 3.   Any higher level protocols should not care about
> > it.
> >
> > Regards,
> >
> > Antony.
> >
> > --
> > There's no such thing as bad weather - only the wrong clothes.
> >
> >  - Billy Connolly
> >
> >
> >
> >                                                      Please reply to the list;
> >                                                            please don't CC me.
> >
> >
>