> Lan2 (OPT1) to outside: ping is ok, www.google.de port 80 is ok,
> everything else, like http to other sites, imap for mailserver, https
> does not work. no errors in the logs, states are ok, reset state and
> reboot has no effect.
You are probably running PPPoE or for some reason suffering MTU issues.
Clamping will be fixed in 1.3b2