Wireless LAN Design at public places

[<Leonard.Ong () nokia com>]

Hi,

Anyone has URL or experiences at designing WLAN at public Places.  I would like to replicate a good implementation, 
I've seen in one airport.  Once we have joined the WLAN using auto-detect accesspoint, my notebook was assigned IP 
address. However, even the next hop / default gateway is not reachable (destination unreachable - ACL?) and so does any 
other services.

It is only when I have authenticate via webpage ( the browser redirects me to the auth page, regardless whatever URL I 
have typed in ), then access is allowed to any.

Thanks... I am particularly intrested on how you can block access even to the def. gateway.


Regards,
Leonard Ong