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Hi all,

i have configured Squid proxy server in Fedoracore3. I am able to access internet from window system.But when i am using WS_FTP from windows, i am not able to connect to the ftp users.I am getting the following error:
"connection failed"
Please if any one can help me.


Hello there,

First of let's make sure you have the following lines in your squid.conf

located here /etc/squid/squid.conf

acl FTP proto FTP
always_direct allow FTP

make sure it is located right bellow your acl where you allow all your clients to use the proxy server.

then do the following

/etc/init.d/squid stop
/etc/init.d/squid start

on your firewall do the following modifications :

add the following lines to /etc/rc.d/rc.local file

/sbin/modprobe ip_conntrack_ftp
/sbin/modprobe ip_nat_ftp

once done, save the file.

then type the following (only doing it this time, so you don't have to restart the firewall to make it work)

/sbin/modprobe ip_conntrack_ftp

then type in the following :

iptables -A INPUT -i $extif -p tcp --sport 21 -m state --state ESTABLISHED -j ACCEPT
iptables -A INPUT -i $extif -p tcp --sport 20 -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -i $extif -p tcp --sport 1024:65535 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT

try connecting to ftp site with your client, it should work.

now you can add these iptables rules to your iptables script so that they will be there from now on, even if you restart the firewall.

$extif = your external interface, the one which is connected to the ISP

hope this helps

Robert B
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