Logging out of a D-Link wireless router

I've got a D-Link wireless router (I don't think the model is
important). I didn't bother with the setup wizard (the web-based
configuration was easy enough). I have it set up for MAC filtering
and will eventually set it up for WPA. I know it's possible to log on
to another access point if unprotected. About the only way I seem to
be able to log out is to power off the router and power it back on. I
had an older SMC wireless router, and every the web-based
configuration page had the option to log out.

Everything is flying now, but I. I thought I saw that it has a
timeout at which point it logs out, but is there any way to manually
log out? Maybe some sort of firmware update? I already upgraded the
firmware to the latest version.