[Fwd: Firewall ( iptables ) enabled for ftp ( active mode & passive mode ) problem]

Edward. S. P. Leong <edwardspl@xxxxxxxxxx> · Sat, 27 Mar 2010 16:39:01 +0800

ftp client ( passive mode ) :

227 Entering Passive Mode (192,168,1,254,226,220).

connecting to 192.168.1.254:58076

- -

connecting to 192.168.1.254:58076

! Connection failed 192.168.1.254 - connection timed out

! connect: error 0

PORT 192,168,1,101,17,247

200 PORT command successful

LIST

150 Opening ASCII mode data connection for file list

Received 61 bytes in 0.1 secs, (6100.00 bps), transfer succeeded

226 Transfer complete

-------- Original Message --------

      Subject: 
      Firewall ( iptables ) enabled for ftp ( active mode &
passive mode ) problem

      Date: 
      Sat, 27 Mar 2010 16:39:01 +0800

      From: 
      Edward. S. P. Leong <edwardspl@xxxxxxxxxx>

      To: 
      fedora-list@xxxxxxxxxx <fedora-list@xxxxxxxxxx>,
proftp-user@xxxxxxxxxxxxxxxxxxxxx

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.

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