The file /etc/apparmor.d/abstractions/apache2-common contains these rules: 22 # Apache 23 network inet stream, 24 network inet6 stream,
which (I guess) needs to enable the trafic. Seems like the profiles need to include this file too, so the added this line to the profile ^myvhost.mydomain { #include <abstractions/apache2-common> ... solved the problem. This was not necessary in previous Debian versions. It would be nice to know, is that the final solution? Should I check any other thing? (Eg. in case of a version upgrade...) a.