We use a linux server as a firewall and forward packets to different
servers. In this case, we applied the iptables to forward packets from $Fido
to $AtlasFtp for FTP. It is ok that we can log in the ftp server, but unable
to do other things such as "ls", neither does Windows GUI FTP.
Does anyone know why the FTP does not work? (we opened the port 20 and 21
for FTP)? Is there something wrong with ports?
############ FTP #########
iptables -t nat -A PREROUTING -i eth0 --dst $Fido -p tcp --dport $FTP_Port
-j DNAT --to $AtlasFtp
# iptables -t nat -A PREROUTING -i eth0 --dst $Fido -p udp --dport
$FTP_Port -j DNAT --to $AtlasFtp
iptables -t nat -A POSTROUTING -p tcp --dst $AtlasFtp --dport $FTP_Port
-j SNAT --to-source $Fido
# iptables -t nat -A POSTROUTING -p tcp --dst $AtlasFtp --dport $FTP_Port
-j SNAT --to-source $Fido
iptables -t nat -A OUTPUT --dst $Fido -p tcp --dport $FTP_Port -j DNAT
--to-destination $AtlasFtp
# iptables -t nat -A OUTPUT --dst $Fido -p udp --dport $FTP_Port -j DNAT
--to-destination $AtlasFtp
Yan
