You could use akregator (KDE app), which uses the cookie from Konqueror then.
You could also add "?login=yourlogin&pwd=yourpassword" to the feed URL in Liferea (check the new URL with the browser before).

Ok, I have tried this:

http://site/b2evolution/index.php?tempskin=_atom&login=user&pwd=pass

Liferea still fails to find the feed :(

What do you get when trying this in your browser??

This works on the demo site: http://demo.b2evolution.net/v-1-9/blogs/index.php?blog=2&tempskin=_atom&login=admin&pwd=demopass (though not tested with $login_required)

Works fine in the browser, though Liferea still cannot find the feed..

Any ideas?

Cannot confirm. I've just tested it with Liferea 1.2.4 on Ubuntu Feisty.
Using "&login=X&pwd=X" in the URL entered in Liferea works with $login_required = true.

If it still does not work, post the URL you use for the subscription, replacing login and pwd, of course.

The above mentioned URL works for the demo site. Changing the password there lets it fail - so that shows that autologin does work.

Okay, that is working fine now :)

I must've mistyped something, thanks a ton!

-r