Can't FTP to my FTP server from outside

Hello,

I have a Fedora Core 2 machine with pure-ftpd server installed behind
my home Siemans 4 port router and DSL modem communicating thru my DSL
ISP. I can FTP to that ftp server fine using its local IP address from
within my home network.

I have done a www.WhatisMyIP.com and determined my internet IP
address. I can ping to that IP from outside of my network but an FTP
attempt yields: connect timed out. I have set the router to make the
local IP address of the FTP server a DMZ machine, hence it should
allow any access through it.

I suspect that my ISP is blocking at least certain ports, from
googling this problem, and that perhaps if I use a high non standard
port somehow, access may be possible.

Is this correct? If so, would someone access my server in a different
way than the usual ftp x.x.x.x ? Also, do I have to change an ftpd
setting from usual defauts?

Thanks so much for any ideas.

Will

Will wrote:

> Hello,
>
> I have a Fedora Core 2 machine with pure-ftpd server installed behind
> my home Siemans 4 port router and DSL modem communicating thru my DSL
> ISP. I can FTP to that ftp server fine using its local IP address from
> within my home network.
>
> I have done a www.WhatisMyIP.com and determined my internet IP
> address. I can ping to that IP from outside of my network but an FTP
> attempt yields: connect timed out. I have set the router to make the
> local IP address of the FTP server a DMZ machine, hence it should
> allow any access through it.
>
You need port forwarding for the ftp port configured on the router to the
lan address of your machine.

> I suspect that my ISP is blocking at least certain ports, from
> googling this problem, and that perhaps if I use a high non standard
> port somehow, access may be possible.
>
That might also be true, check with grc.com after you did setup the
forwarding. And consider you are probably violating your isp's policy.

> Is this correct? If so, would someone access my server in a different
> way than the usual ftp x.x.x.x ? Also, do I have to change an ftpd
> setting from usual defauts?
>
Yes (from a browser, for example, ftp://usernameassword@yourip:2121/) and
yes.
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