@northlight are you sure that it's not an HTTP request what is causing the delay? Can you check the requests waterfall using the elements inspector of your browser? (do you know what I mean? if not, please ask for a bit longer explanation).

The thing is that if you have already disabled all the post pings (http://b2evolution.net/man/after-each-new-post), there is no reason for more hidden connections to b2evolution.net, so I guess that the reason might be something else.

Search for intranet setup in the manual. This is well documented.

edit: http://b2evolution.net/man/intranet-setup

@mgsolipa wrote earlier:

@northlight are you sure that it's not an HTTP request what is causing the delay? ....

Thanks for your reply.
After editing /inc/dashboard/model/_dashboard.funcs.php and /inc/_core/_misc.funcs.php the backend shows up within no time.

Off course, other things may not work propperly now -> but contacting b2evolution.net with every login is the source of the (one) waiting time.
Besides of the 1 minute waiting time, I don't know if this is legal within European Union - especially Germany. I recommend, that this is not activated by default.
b2evolution-blog admins should ping b2evolution.net only by clicking on a special button it they want to.

Francois said that the app will ping b2evolution anyway every 12 hours: http://forums.b2evolution.net/centralized-antispam-pinging-b2evolution-net#c106973

@fplanque wrote earlier:

Search for intranet setup in the manual. This is well documented.

Ok. Thanks for the advice!
It seems, that there are the solutions :)

I just want to confirm, that the login and backend are running in no time now. :)
Thanks!