WHM/cPanel – List of all ports and a script to test them
24 June 2025
3:41 am
Here is a Bash script to test all inbound cPanel ports: 20 FTP 21 FTP 22 SSH 25 SMTP 26 SMTP 53 DNS 80 HTTP
Knowledgebase
Roundcube Webmail on server slow (but actually not working and no errors) – just hanging
24 June 2025
3:20 am
According to cPanel support, if your Roundcube is slow, you should read this: https://support.cpanel.net/hc/en-us/articles/360049982694-Webmail-Login-stuck-on-Logging-you-in And do this: cat /usr/local/cpanel/logs/php-fpm/error.log Look for: WARNING: [pool user_username] server
Super slow DNS cluster with WHM/cPanel
24 June 2025
2:57 am
Synopsis At times your cPanel DNS cluster will be excruciating slow. Adding or removing DNS zone records will take an inordinate amount of time. To
During large cPanel to cPanel migration using Transfer Tool, Maildir format is not converted to mdbox format
20 June 2025
2:08 am
Synopsis cPanel uses Dovecot as it’s IMAP storage. Dovecot can be configured for either Maildir or mdbox format. During a large (1 TB) transfer from
How to use top and see one process only
12 June 2025
10:13 am
Use this command: top -p $(pgrep -d’,’ rsync)
Super slow DNS cluster with WHM/cPanel
24 June 2025
Synopsis At times your cPanel DNS cluster will be excruciating slow. Adding or removing DNS zone records will take an inordinate amount of time. To
WHM/cPanel – List of all ports and a script to test them
24 June 2025
Here is a Bash script to test all inbound cPanel ports: 20 FTP 21 FTP 22 SSH 25 SMTP 26 SMTP 53 DNS 80 HTTP
Roundcube Webmail on server slow (but actually not working and no errors) – just hanging
24 June 2025
According to cPanel support, if your Roundcube is slow, you should read this: https://support.cpanel.net/hc/en-us/articles/360049982694-Webmail-Login-stuck-on-Logging-you-in And do this: cat /usr/local/cpanel/logs/php-fpm/error.log Look for: WARNING: [pool user_username] server
After a Virtualmin IP address migration, the server has the old IP as NAT
23 June 2025
When you change the IP address on a Virtualmin server, the server will detect the IP address has changed and prompt to update all the
Virtualmin doesn’t upgrade: How to fix invalid signature Virtualmin apt packages
23 June 2025
Whilst updating Virtualmin, you might get this error: Err:6 https://software.virtualmin.com/vm/6/gpl/apt virtualmin-focal InRelease The following signatures were invalid: EXPKEYSIG D9F9010760D62A6B Virtualmin, Inc. (Package signing key for