From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paulo Andre Subject: Re: portfw on iptables 2.4 kernel problem. Date: 10 Dec 2002 11:01:45 +0200 Sender: netfilter-admin@lists.netfilter.org Message-ID: <1039510905.11113.10.camel@bigblue> References: <014901c2a02a$0dbf59f0$0b00000a@nocpc3> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <014901c2a02a$0dbf59f0$0b00000a@nocpc3> Errors-To: netfilter-admin@lists.netfilter.org List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" To: louie miranda Cc: netfilter On Tue, 2002-12-10 at 10:56, louie miranda wrote: > I have an internel ftp server w/c i want to access over my linux router(gw) > Its internel IP is 10.0.0.11 and port 21. My externel IP lets say > 203.100.100.1. > I followed the docs w/c i found at linuxdoc > http://www.tldp.org/HOWTO/IP-Masquerade-HOWTO/forwarders.html > I type in this iptables rule set, > > iptables -A FORWARD -i eth0 -o eth1 -p tcp --dport 21 -m state --state > NEW,ESTABLISHED,RELATED -j ACCEPT > iptables -A PREROUTING -t nat -p tcp -d $EXTIP --dport 21 -j DNAT --to > 10.0.0.11:21 > > I enabled ip forwarding thru the kernel by typing this command, (this is the > first thing i type then the iptables rule set) > > echo "1" > /proc/sys/net/ipv4/ip_forward > > svr:/# cat /proc/sys/net/ipv4/ip_forward > 1 > svr:/# > > And still it does not work.. > > Trying 203.100.100.1... > telnet: Unable to connect to remote host: Connection refused > > You will have to allow port 20 aswell...FTP uses both port 20 and 21 > > > > -- > thanks, > louie miranda > > >