The ISPConfig server ("Perfect server") randomly just stopped responding to requests and externally I get "so n so's website took too long to respond". I rebooted the server, verified it has no firewalls on, rebooted the firewall, verified route/port rules on the firewall are correct, checked the IP tables, cleared arp on the firewall, and checked with the datacenter everything was alright with our handoff. Internally I am able to get to the server and its websites if I make manual DNS records. The server itself is able to see the internet and install packages no issues. At this point I am ready to just blow out the server and rebuild it. Any recommendations?
Start with this: https://forum.howtoforge.com/threads/please-read-before-posting.58408/ You did not say you have monitored load on the server? Do that, posting the common issues report shows some info.
Ubuntu 20.04.3 LTS PHP 7.4.3-4ubuntu2.18 ISPConfig 3.2.7p1 Code: ##### SERVER ##### IP-address (as per hostname): ***.***.***.*** [WARN] could not determine server's ip address by ifconfig [INFO] OS version is Ubuntu 20.04.3 LTS [INFO] uptime: 11:36:40 up 15:51, 1 user, load average: 0.06, 0.04, 0.00 [INFO] memory: total used free shared buff/cache available Mem: 15Gi 2.0Gi 11Gi 21Mi 2.4Gi 13Gi Swap: 4.0Gi 0B 4.0Gi [INFO] systemd failed services status: UNIT LOAD ACTIVE SUB DESCRIPTION ● amavis.service loaded failed failed LSB: Starts amavisd-new mailfilter ● fwupd-refresh.service loaded failed failed Refresh fwupd metadata and update motd ● snap.lxd.activate.service loaded failed failed Service for snap application lxd.activate LOAD = Reflects whether the unit definition was properly loaded. ACTIVE = The high-level unit activation state, i.e. generalization of SUB. SUB = The low-level unit activation state, values depend on unit type. 3 loaded units listed. [INFO] ISPConfig is installed. ##### ISPCONFIG ##### ISPConfig version is 3.2.7p1 ##### VERSION CHECK ##### [INFO] php (cli) version is 7.4.3-4ubuntu2.18 [INFO] php-cgi (used for cgi php in default vhost!) is version 7.4.3 ##### PORT CHECK ##### [WARN] Port 465 (SMTP server SSL) seems NOT to be listening ##### MAIL SERVER CHECK ##### [WARN] I found no "submission" entry in your postfix master.cf [INFO] this is not critical, but if you want to offer port 587 for smtp connections you have to enable this. [WARN] I found no "smtps" entry in your postfix master.cf [INFO] this is not critical, but if you want to offer SSL for smtp (not TLS) connections you have to enable this. ##### RUNNING SERVER PROCESSES ##### [INFO] I found the following web server(s): Apache 2 (PID 1312) [INFO] I found the following mail server(s): Postfix (PID 1767) [INFO] I found the following pop3 server(s): Dovecot (PID 817) [INFO] I found the following imap server(s): Dovecot (PID 817) [INFO] I found the following ftp server(s): PureFTP (PID 1425) ##### LISTENING PORTS ##### (only () Local (Address) [anywhere]:993 (817/dovecot) [anywhere]:995 (817/dovecot) [localhost]:10023 (1131/postgrey) [localhost]:10025 (1767/master) [localhost]:10027 (1767/master) [localhost]:11211 (828/memcached) [anywhere]:110 (817/dovecot) [anywhere]:143 (817/dovecot) [anywhere]:21 (1425/pure-ftpd) ***.***.***.***:53 (830/named) [localhost]:53 (830/named) ***.***.***.***:53 (796/systemd-resolve) [anywhere]:22 (924/sshd:) [anywhere]:25 (1767/master) [localhost]:953 (830/named) *:*:*:*::*:993 (817/dovecot) *:*:*:*::*:995 (817/dovecot) *:*:*:*::*:3306 (1035/mysqld) [localhost]10 (817/dovecot) [localhost]43 (817/dovecot) *:*:*:*::*:8080 (1312/apache2) *:*:*:*::*:80 (1312/apache2) *:*:*:*::*:8081 (1312/apache2) *:*:*:*::*:21 (1425/pure-ftpd) *:*:*:*::**:*:*:*::*53 (830/named) *:*:*:*::*:22 (924/sshd:) *:*:*:*::*:25 (1767/master) *:*:*:*::*:443 (1312/apache2) ##### IPTABLES ##### Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination ##### LET'S ENCRYPT ##### Certbot is installed in /usr/bin/letsencrypt
I suggest upgrading ISPConfig to latest as first thing. Have you examined why those three services are failing? So this host is not used as e-mail server?
I ended up building a new server and exporting the sites internally and imported them to the new server. So if you want to continue troubleshooting this for sport, or close this thread out.
