Can't keep listener going on RHEL/CentOS/Rocky Linux

[FTP]

The old version of RHEL/CentOS will use the firwall "iptables" by default, so you need to add some rules for your listener ports like this:

Code: Select all

su -
/sbin/iptables -I INPUT -p tcp --dport 80 -j ACCEPT
/sbin/iptables -I INPUT -p tcp --dport 21 -j ACCEPT
/sbin/iptables -I INPUT -p tcp --dport 5466 -j ACCEPT
/etc/rc.d/init.d/iptables save
/etc/init.d/iptables restart

For RHEL/CentOS/Rocky 8.0+, you can use the below commands:

Code: Select all

su -
firewall-cmd --zone=public --permanent --add-port 80/tcp
firewall-cmd --zone=public --permanent --add-port 21/tcp
firewall-cmd --zone=public --permanent --add-port 5466/tcp
firewall-cmd --reload