获取FTP与IPTables一起工作

如果我停止IPTables服务，我的ftp服务器按预期工作。 但是，启用时，我无法连接（在发生authentication之前）。

# iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- anywhere anywhere tcp dpt:http ACCEPT tcp -- anywhere anywhere tcp dpt:https ACCEPT tcp -- anywhere anywhere tcp dpt:domain ACCEPT udp -- anywhere anywhere udp dpt:domain ACCEPT tcp -- anywhere anywhere tcp dpt:rndc ACCEPT tcp -- anywhere anywhere tcp dpt:ssh ACCEPT tcp -- anywhere localhost tcp dpt:mysql ACCEPT tcp -- anywhere anywhere tcp dpt:imaps ACCEPT tcp -- localhost anywhere tcp dpt:sunrpc ACCEPT tcp -- localhost anywhere tcp dpt:imap ACCEPT tcp -- anywhere anywhere tcp dpt:smtp ACCEPT icmp -- anywhere anywhere ACCEPT tcp -- anywhere anywhere tcp flags:ACK/ACK ACCEPT all -- anywhere anywhere state ESTABLISHED ACCEPT all -- anywhere anywhere state RELATED REJECT all -- anywhere anywhere reject-with icmp-port-unreachable ACCEPT all -- anywhere anywhere helper match "ftp" ACCEPT tcp -- anywhere anywhere tcp dpt:ftp Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- anywhere anywhere tcp spt:ftp-data