trusty verification First, reproducing the bug. Package used: root@trusty-apache2-1529355:~# apt-cache policy apache2 apache2: Installed: 2.4.7-1ubuntu4.20 Candidate: 2.4.7-1ubuntu4.20 Version table: 2.4.10-1ubuntu1.1~ubuntu14.04.2 0 100 http://br.archive.ubuntu.com/ubuntu/ trusty-backports/main amd64 Packages *** 2.4.7-1ubuntu4.20 0 500 http://br.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages 100 /var/lib/dpkg/status 2.4.7-1ubuntu4 0 500 http://br.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages - wget works: root@trusty-apache2-1529355:~# wget localhost -O /dev/null --2019-01-09 12:53:09-- http://localhost/ Resolving localhost (localhost)... 127.0.0.1 Connecting to localhost (localhost)|127.0.0.1|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 11510 (11K) [text/html] Saving to: ‘/dev/null’ 100%[========================================================================================================================================================================================>] 11,510 --.-K/s in 0s 2019-01-09 12:53:09 (143 MB/s) - ‘/dev/null’ saved [11510/11510] error.log contains the bug line: root@trusty-apache2-1529355:~# tail -n 1 /var/log/apache2/error.log [Wed Jan 09 12:53:09.835097 2019] [authz_core:error] [pid 9272:tid 139970345383680] [client 127.0.0.1:34994] AH02305: no alias provider found for 'blacklisted-ips' (BUG?) access.log shows normal access: root@trusty-apache2-1529355:~# tail /var/log/apache2/access.log 127.0.0.1 - - [09/Jan/2019:12:53:09 +0000] "GET / HTTP/1.1" 200 11820 "-" "Wget/1.15 (linux-gnu)" Now with the updated package: root@trusty-apache2-1529355:~# apt-cache policy apache2 apache2: Installed: 2.4.7-1ubuntu4.21 Candidate: 2.4.7-1ubuntu4.21 Version table: 2.4.10-1ubuntu1.1~ubuntu14.04.2 0 100 http://br.archive.ubuntu.com/ubuntu/ trusty-backports/main amd64 Packages *** 2.4.7-1ubuntu4.21 0 500 http://br.archive.ubuntu.com/ubuntu/ trusty-proposed/main amd64 Packages 100 /var/lib/dpkg/status 2.4.7-1ubuntu4.20 0 500 http://br.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages 2.4.7-1ubuntu4 0 500 http://br.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages - wget fails, correctly: root@trusty-apache2-1529355:~# wget localhost -O /dev/null --2019-01-09 12:55:35-- http://localhost/ Resolving localhost (localhost)... 127.0.0.1 Connecting to localhost (localhost)|127.0.0.1|:80... connected. HTTP request sent, awaiting response... 403 Forbidden 2019-01-09 12:55:35 ERROR 403: Forbidden. error.log contains the forbidden message instead of the bug one: [Wed Jan 09 12:55:35.360992 2019] [authz_core:error] [pid 9834:tid 139771624998656] [client 127.0.0.1:35014] AH01630: client denied by server configuration: /var/www/html/ access.log confirms the 403: root@trusty-apache2-1529355:~# tail /var/log/apache2/access.log -n 1 127.0.0.1 - - [09/Jan/2019:12:55:35 +0000] "GET / HTTP/1.1" 403 492 "-" "Wget/1.15 (linux-gnu)" Trusty verification succeeded.