21 - FTP Command 22 - SSH 25 - Email 53 - DNS 80 - HTTP (Webserver) 110 - POP3 (Email) 143 -Imap (Email) 443 - HTTPS (Secure web server) 993 - IMAPS. Jan 26, 2017 - I've tried creating several FTP user accounts (in the ISPConfig FTP user control panel) and when I attempt to connect with either SFTP or FTP I.
Here is a list of ports that are used commonly on ISPConfig 3 servers. If you don't have all services installed or if you e.g. Don't want to connect to MySQL from external servers, then close the unused or unwanted ports.
TCP ports 20 - FTP Data 21 - FTP Command 22 - SSH 25 - Email 53 - DNS 80 - HTTP (Webserver) 110 - POP3 (Email) 143 -Imap (Email) 443 - HTTPS (Secure web server) 993 - IMAPS (Secure Imap) 995 - POP3S (Secure POP3) 3306 - MySQL Database server 8080 - ISPConfig web interface 8081- ISPConfig apps vhost UDP ports 53 - DNS 3306 - MySQL.
If you run a firewall on your Linux server and want to use passive FTP connections, you have to define the passive port range in pure-ftpd and your firewall to ensure that the connections dont get blocked. The following example is for pure-ftpd on Debian or Ubuntu Linux and ISPConfig 3: 1) Configure pure-ftpd echo '0' /etc/pure-ftpd/conf/PassivePortRange /etc/init.d/pure-ftpd-mysql restart 2) Configure the firewall. If you use ISPConfig 3 on my server to configure the bastille firewall, you can add the nescessera port range in the ISPConfig firewall settings. Change the list of Open TCP ports from: 20,21,22,25,53,80,110,143,443,3306,8080,10000 to: 20,21,22,25,53,80,110,143,443,3306,8080,0:40210 and then click on 'Save'.