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1. 1. centos 开启防火墙后ftp无法访问解决方案

centos 开启防火墙后ftp无法访问解决方案

linux Iptables trouble

Your question isn’t phrased very well, but the symptoms you describe are indicative of a passive FTP not working correctly in combination with your firewall.

Typically the command insmod nf_conntrack_ftp is sufficient to load the FTP helper module in a badly configured RHEL6 or CentOS firewall.

To make that persistent:

Edit the configuration file /etc/sysconfig/iptables-config and add the helper module nf_conntrack_ftp to the IPTABLES_MODULES variable:

IPTABLES_MODULES="nf_conntrack_ftp"

or add it to any other modules already listed there.