Re: ftp nat MAX PORTS

[iansolo <iansolo.netfilter@betisgroup.com>]

Hi,
somebody have understand my problem?

thanks

iansolo wrote:
> Hi All,
> I've a problem with ftpserver behind a NAT.
> My necessity is to run ftpserver in a different port then 21.
> This is the situation:
> 
> Router
> |
> Firewall
> |
> Ftpserver
> 
> I use this modules ad pass these parameters :
> 
> /sbin/modprobe ip_tables
> /sbin/modprobe ip_conntrack
> /sbin/modprobe ip_conntrack_ftp ports=21,9000
> /sbin/modprobe iptable_nat
> /sbin/modprobe ip_nat_ftp ports=21,9000
> /sbin/modprobe ipt_MASQUERADE
> /sbin/modprobe ipt_state
> 
> The realtive iptables rules are only these:
> 
> $IPTABLES -t nat -A PREROUTING -p tcp -d $EXT_LAN_FW --dport 9000 -j NAT 
> --to-destination $IP_FTPSERVER:9000
> $IPTABLES -A FORWARD -i $EXT_IF -p tcp --dport 9000 -j ACCEPT -d 
> $IP_FTPSERVER
> 
> Unfortunately don't work!
> 
> 
> VERY IMPORTANT :
> 
> - All work fine is the port is 21!!
> 
> - When I try to connect with my ftp-client(with port 9000), at a certain 
> point I tray to send packets to local IP of firewall ($EXT_LAN_FW).....
> 
> Others Questions:
> 
> - In the source code of ip_conntrack_ftp there is a variable "MAX_PORTS",
> but I don't understand what mean...
> - What is "Patch-O-Matic" ?
> 
> 
> Thanks a lot in advance!
> iansolo
> 
> ps: excuse me, my English is poor
> 
> 
> 
> 
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