How to find and fix Fuzz Faster U Fool attacks on a hosted cPanel server attacking ports 2083 and 2086
Fuzz Faster U Fool attacks is a technique whereby attackers scan cPanels servers at incredibly high speed on ports 2083 and 2086 and look for
Control Panels
WHM/cPanel – List of all ports and a script to test them
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
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
cPanel Transfer Tool Hangs
The cPanel Transfer Tool is incredibly powerful, but at times and given the wrong servers/bandwidth, it might hang. Use top to look for rsync processes.
Apache on WHM/cPanel randomly stops working – intermittently – possible PHP-FPM issue
Symtoms Randomly, perhaps once or twice a month, Apache completely stops serving sites. No obvious errors, except web sites aren’t loading anymore. From HTTP monitoring
After a Virtualmin IP address migration, the server has the old IP as NAT
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
How to get chroot jailkit working in Virtualmin
Recipe: apt-get install webmin-jailkit Once it is installed you will find a new section in Webmin -> System -> Jailkit Jail Manager Then go to
How to downgrade a Virtualmin Pro license back to GPL
Here is the command: virtualmin downgrade-license –perform
Virtualmin doesn’t upgrade: How to fix invalid signature Virtualmin apt packages
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
cPanel & WHM update failure in upcp script – The following events were logged: “scripts/update-packages”.
Background If you have many cPanel servers you’ll find from time to time they don’t update. This is unfortunately a more common problem than usual.