Do you have both ports 20 and 21 open, both TCP and UDP?

On Sat, 22 Jun 2002, David Busby wrote:

> List,
>       I've got a 7.2 machine using IPTables to NAT my office to the internet.
> All traffic works find except FTP.  When my ftp clients issue the PORT
> command the server responds with a 500 error.  If I put my office hosts
> on to our old NAT box to the internet the PORT command is sucessful.  So
> I'm thinking that there must be something wrong with my IPTables setup.
>    I've tried removing my DROP rules for my INPUT chain but it didn't
> help.  Any advice?
> 
> TIA
> /B
> 
> Here's my iptables -L
> 
> [root@tutamen /]# iptables -L
> Chain INPUT (policy ACCEPT)
> target     prot opt source               destination
> DROP       icmp --  anywhere             anywhere
> ACCEPT     tcp  --  anywhere             anywhere           tcp dpt:ssh
> DROP       tcp  --  anywhere             anywhere
> 
> Chain FORWARD (policy ACCEPT)
> target     prot opt source               destination
> 
> Chain OUTPUT (policy ACCEPT)
> target     prot opt source               destination
> [root@tutamen /]# iptables -t nat -L
> Chain PREROUTING (policy ACCEPT)
> target     prot opt source               destination
> 
> Chain POSTROUTING (policy ACCEPT)
> target     prot opt source               destination
> MASQUERADE  all  --  anywhere             anywhere
> 
> Chain OUTPUT (policy ACCEPT)
> target     prot opt source               destination
> [root@tutamen /]#
> 
> 
> 
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