For testing purposes I set up captive portal with following settings
PC throught HUB is connected to m0n0wall firewall router.
Idle timeouts 2
Hard timeout 5
redirect url http://my.site.com
Radius auth with no accounting updates and without "reauthenticate
portal page content is default as shown in sample.
After 5 minutes (hard timeout) client is not able to reauthenticate,
because auth page not appear. It is not possible to open pages outside
LAN and authentication page also not appear
I removed hard timeout, but the same problem happened after 2 minutes
It seems, that I have problem with url redirection after timeout to my router
How it is possible to solve this problem?