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

Saturday, 27 March 2010

please, load nf_conntrack_ftp module (modprobe nf_conntrack_ftp)
your original iptables rules looks good
ip_conntrack is compiled into kernel already
jkk
--
W dniu 2010-03-27 13:04, Edward. S. P. Leong napisa?/?a:
...
 Hello,

 [root@host1 ~]# lsmod|grep ftp
 [root@host1 ~]#

 Output is nothing

 And:

 [root@host1 ~]# iptables -A INPUT -i eth1 -m nf_conntrack_ftp -p tcp 
 --dport 21 -d 192.168.1.254  -j ACCEPT
 iptables v1.4.3.1: Couldn't load match 
 `nf_conntrack_ftp':/lib/xtables/libipt_nf_conntrack_ftp.so: cannot 
 open shared object file: No such file or directory

 Try `iptables -h' or 'iptables --help' for more information.
 [root@host1 ~]#

 No of the modules can't be loaded...

 Any other help ?

 Thanks !

 jkk(a)csk.umed.lodz.pl wrote:
> What is output from command:
> lsmod|grep ftp
>
> module nf_conntrack_ftp is a must for passive mode
>
> Dnia 27 Marca 2010, 09:42, So, Edward. S. P. Leong napisa?(a):
>    
>> 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&lt;edwardspl(a)ita.org.mo&gt;
>> To: 	fedora-list(a)redhat.com  <fedora-list(a)redhat.com&gt;,
>> proftp-user(a)lists.sourceforge.net
>>
>>
>>
>> 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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>>      
>
>    

-- 
*****************************************************
* jan k.kaminski, nucl.med.dept, med.univ. of lodz  *
*     pgpkey http://w4u.am.lodz.pl/~jkk/            *
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