On Wed, 25 Aug 1999, Martin Krzywinski wrote:
>
> I'm starting to fiddle with ipchains. I'm masquarading
>
> router --- [x.x.199.193]FIREWALL[10.1.1.1] --- private network
>
> A few things aren't working. For example, I can't ftp out of the private
> clients. The connection is made but the server complains about port
> numbers. I guess there's something screwy in the masquerading setup.
> Telnet and browsing work fine. Http downloads work fine.
>
> I've got
>
> ipchains -A forward -j MASQ
>
> added, but just that for now.
>
> In addition, I'd like to have internal web/ftp/ssh servers. How can I
> forward requests to x.x.199.194 on a given port, say 23, to go to
> 10.1.1.Y:23?
>
Hi, I'm relatively new at linux networking but I was just reading about
FTP last night... FTP listens to port 21 for connections but switches to
port 20 for transfers. So you might have to open up port 20 on your
firewall.
-Mike
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