I've got a problem with my Apache installation on Ubuntu 17.10.
On this machine I have classic (I suppose) LAMPP installation with Apache, PHP and MySQL database for supporting owncloud and webmin.
Everything was working fine since a couple of days ago when I installed utorrent following this guide.
Of course, I choosed for the Apache version (I skipped the ngix part) and everything seamed to be OK.
But it was not...because since then, I was not able to reach my server from my LAN anymore.
If I browse from this local machine, all my sites are working fine. Even with the loopback address or the local address. But from the the other PCs of the LAN, they don't respond anymore.
I suppose that was beacause of the reverse proxy step of the utorrent guide, but I'm not sure about it and I don't know how to check it.
I also checked ufw for the firewall and all the ports needed are correctly opened.
So, my question is: how can I correctly diagnose the problem? How can I check what's going on with apache?
edit: This is the reply to "apache2ctl -S":
VirtualHost configuration:
*:80 my.public.url (/etc/apache2/sites-enabled/000-default.conf:1)
*:443 my.public.url (/etc/apache2/sites-enabled/default-ssl.conf:2)
*:7070 my.public.url (/etc/apache2/sites-enabled/utorrent.conf:1)
ServerRoot: "/etc/apache2"
Main DocumentRoot: "/var/www/html"
Main ErrorLog: "/var/log/apache2/error.log"
Mutex watchdog-callback: using_defaults
Mutex proxy-balancer-shm: using_defaults
Mutex rewrite-map: using_defaults
Mutex ssl-stapling-refresh: using_defaults
Mutex ssl-stapling: using_defaults
Mutex proxy: using_defaults
Mutex ssl-cache: using_defaults
Mutex default: dir="/var/run/apache2/" mechanism=default
Mutex mpm-accept: using_defaults
PidFile: "/var/run/apache2/apache2.pid"
Define: DUMP_VHOSTS
Define: DUMP_RUN_CFG
User: name="www-data" id=33
Group: name="www-data" id=33
and this is the reply to "netstat -lntu":
Connessioni Internet attive (solo server)
Proto CodaRic CodaInv Indirizzo locale Indirizzo remoto Stato
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:5355 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:10000 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:5939 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:7070 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:10015 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:6881 0.0.0.0:* LISTEN
tcp6 0 0 :::5355 :::* LISTEN
tcp6 0 0 :::10000 :::* LISTEN
tcp6 0 0 :::80 :::* LISTEN
tcp6 0 0 ::1:631 :::* LISTEN
tcp6 0 0 :::443 :::* LISTEN
tcp6 0 0 :::7070 :::* LISTEN
tcp6 0 0 :::6881 :::* LISTEN
udp 0 0 0.0.0.0:5353 0.0.0.0:*
udp 0 0 0.0.0.0:5353 0.0.0.0:*
udp 0 0 0.0.0.0:5355 0.0.0.0:*
udp 0 0 0.0.0.0:10000 0.0.0.0:*
udp 0 0 0.0.0.0:1900 0.0.0.0:*
udp 0 0 0.0.0.0:40864 0.0.0.0:*
udp 0 0 127.0.0.53:53 0.0.0.0:*
udp 0 0 0.0.0.0:68 0.0.0.0:*
udp 0 0 192.168.2.24:49308 0.0.0.0:*
udp 0 0 127.0.0.1:51640 0.0.0.0:*
udp 0 0 0.0.0.0:631 0.0.0.0:*
udp 0 0 0.0.0.0:6881 0.0.0.0:*
udp6 0 0 :::5353 :::*
udp6 0 0 :::5353 :::*
udp6 0 0 :::5355 :::*
udp6 0 0 :::43741 :::*
udp6 0 0 :::6881 :::*
If you have configured reverse proxy in *:80 port, that is the behavior of apache. Remove the reverse proxy directives you created and your web server is functional again.
I mean the: