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 From:  Lee Sharp <leesharp at hal dash pc dot org>
 To:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] critical problem with captive portal and access in monowall 1.23b
 Date:  Wed, 24 Oct 2007 13:10:04 -0500
Rönnblom Janåke /Teknous wrote:
> Hi!
> We're using m0n0wall as a captive portal. The m0n0wall handles routing between
> the WAN and LAN. NAT is not used. 
> We have had a problem these last weeks with a few PCs. When the client connects
> they get an IP address from our DHCP but when they try to connect to the
> captive portal the webbrowser times out with an message that it cant find the
> server. The problem is resolved when the clients get a new ip address or by
> rebooting the m0n0wall. We have at maximum 150 - 160 clients connected to this
> network.

When this happens try and see if a "broken" client can connect to the 
http://m0n0wallip:8000 which is what the captive portal is supposed to 
redirect to.  This will tell you if it is a redirect issue, and we can 
go from there.