Dear All,

Mine is FC11 OS...
So, how can we enable the firewall ( iptables ) for using ftp ( active
mode & passive mode ) service ?

For the existing setting :
iptables -F
iptables -X
iptables -F -t nat
iptables -X -t nat
iptables -F -t mangle
iptables -X -t mangle

iptables -P INPUT DROP
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -t nat -P OUTPUT ACCEPT
iptables -t nat -P PREROUTING ACCEPT
iptables -t nat -P POSTROUTING ACCEPT
iptables -t mangle -P PREROUTING ACCEPT
iptables -t mangle -P POSTROUTING ACCEPT
iptables -t mangle -P INPUT ACCEPT
iptables -t mangle -P OUTPUT ACCEPT
iptables -t mangle -P FORWARD ACCEPT

iptables -A INPUT -i lo -j ACCEPT
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

int="eth1"
int_add="192.168.1.254"
int_src="192.168.1.0/24"
# Only allow users to use port 22 ( ssh services ) :
iptables -A INPUT -i $int -p tcp --dport 22 -s $int_src -d $int_add -j
ACCEPT
# Only allow users to use port 20 & 21 ( ftp services ) :
iptables -A INPUT -i $int -p tcp --dport 20 -s $int_src -d $int_add -j
ACCEPT
iptables -A INPUT -i $int -p tcp --dport 21 -s $int_src -d $int_add -j
ACCEPT
# ping ( ICMP )
iptables -A INPUT -i $int -p icmp --icmp-type echo-request -s $int_src
-d $int_add -j ACCEPT

Problem of ftp client :
connection timenout

Thanks !

Edward.