Workaround found in the mailing list

[fossil-users] Login/Logout while on localhost
Jeremy Cowgar
Wed, 09 Dec 2009 11:56:02 -0800

In another discussion, I read:

> i noticed a similar problem a couple days ago - it is impossible to log out
> when connecting to a local fossil server over the localhost IP. i wanted to
> test the anonymous captcha filler and had to log in over the IP my NIC gets
> from my WLAN router in order to be able to log in and out. Any connections
> over localhost were automatically my admin account, and i couldn't log out.
>

If you turn on the "Require password for local access" option found under
Admin>Access, then you will be able to login/logout while connecting via
localhost.

Jeremy