Archived from groups: comp.dcom.lans.ethernet (
More info?)
LWG,
I think that Brant made his comment in response to something I mentioned
in my post
...
Jim
LWG wrote:
>
> Brant, interesting approach, the squid proxy. However, this Radisson has no
> registration. I just plugged in the cat5 on the desk in the room and away I
> went. Full news, no proxied web browsing etc. The performance is great and
> appears to be totally open...
>
> L
> "Brant I. Stevens" <branto@branto.com> wrote in message
> news:BD7DF30C.11DA6%branto@branto.com...
> > The page that directed you to register before accessing the Internet was,
> > in
> > all likelihood, was sent to you by a transparent proxy. Squid has this
> > capability, as do many other devices on the market.
> >
> >
> > On 9/25/04 11:54 PM, in article 41563D59.BA92AE30@cox.net, "ohaya"
> > <ohaya@cox.net> wrote:
> >
> >>
> >>
> >> Walter Roberson wrote:
> >>>
> >>> In article <dtudnYi-l5xkjMvcRVn-sg@giganews.com>,
> >>> LWG <lgovedi1@tampabay.rr.com> wrote:
> >>> :I was using a hotel network and was curious about what was out there so
> >>> I
> >>> :brought up ethereal. I started a capture and could not see any traffic.
> >>> I
> >>> :was just curious about why? Is there something different about the way
> >>> they
> >>> :have built there network?
> >>>
> >>> Possibly yes. There are some routers available that listen for ARP
> >>> packets on interfaces, and reply back as if they were the target
> >>> address (on the assumption that the first thing arp'd for would be
> >>> the gateway IP of the network the user's equipment is set up for.
> >>> In this way, no matter what gateway address the user's equipment
> >>> is set up for, the user gets connected without having to reconfigure.
> >>>
> >>> These routers can handle multiple ports with the same IP address --
> >>> they use distinct internal IP addresses per port and do NAT at the port
> >>> level.
> >>>
> >>> All of this relies upon separation of segments -- otherwise the
> >>> user in room 10B who happens to be using IP gateway 192.168.0.1
> >>> could end up with their traffic mixed with the user of room 28C
> >>> who also happens to be using an IP gateway of 192.168.0.1 .
> >>> Thus, this equipment would take extra care to be sure the ports were
> >>> not talking to each other.
> >>>
> >>> But the answer could be a lot more simple than that: they could
> >>> just use a regular switch (say a Cisco 3550) with the port
> >>> protection facility turned on to prevent traffic from flowing
> >>> between ports. Or they could put every room into a different VLAN
> >>> and put on an ACL that blocks ARP and other broadcast packets
> >>> from flowing between ports. Recall that if you are using switched
> >>> segments, then the only traffic you will see on your segment
> >>> is traffic that you generate, or that is destined to you, or which
> >>> is sent to a broadcast or multicast MAC and the switch thinks that
> >>> maybe your segment might happen to have a suitable destination.
> >>> Block those broadcast packets and you block everything except
> >>> local traffic.
> >>
> >>
> >> Hi,
> >>
> >> I don't know about Ethereal, but I was in a hotel in Florida last year,
> >> and first thing I needed a special network cable from the front desk and
> >> get them to "enable" the RJ45 port in my room to start working.
> >>
> >> Then, when I first tried to connect to the Internet, it re-routed me to
> >> a website to register and agree to terms, etc. Once that was done, I
> >> was able to connect to the Internet.
> >>
> >> Like I said, I don't know how they did all this, but I would have
> >> guessed that it was something akin to a VLAN where you can enable ports
> >> on a switch probably somewhere in the hotel.
> >>
> >> Jim
> >
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