opening ports

hello,

maybe a simple and not interesting question butt how do i open port 20 and
21 for my SBS server?

i had SP1 on my server butt updated it with SP2, now if i want to FTP i
don`t have a connection. i think the port is blocked. when i look at the
routing and ras i see FTP so does it mean it already is open?

i did not change anything on my modem because it workt before installing
SP2..

can anyone help me?

regards stefan

S Reugebrink wrote:
> hello,
>
> maybe a simple and not interesting question butt how do i open port 20
> and 21 for my SBS server?
>
> i had SP1 on my server butt updated it with SP2, now if i want to FTP i
> don`t have a connection. i think the port is blocked. when i look at the
> routing and ras i see FTP so does it mean it already is open?
>
> i did not change anything on my modem because it workt before installing
> SP2..
>
> can anyone help me?
>
> regards stefan

Not an expert here, but this may be illuminating:
http://www.slacksite.com/other/ftp.html

Phil, London

Ports don't "self-exist". They are only "imaginary".
They are only an address number just like an IP# is an address number.

A port is "born" when an Application that listens on that port is
executed,...just like an IP# is "born" when a network interface configured
of a particular IP# is activated/enabled.

An IP# (a Layer3 address) indentifies a Machine (the interface in
particular)
A Port# (a Layer4 address) identifies an Application
The two of them combined together are called a "Socket",...if either one
goes away, the Socket dies.

You "create" port 20 & 21 by enabling an FTP Server on the machine,...such
as the one included in IIS.

--
Phillip Windell
www.wandtv.com

The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
-----------------------------------------------------

"S Reugebrink" <(E-Mail Removed)> wrote in message
news:ACC3B9DE-12B7-48D8-A891-(E-Mail Removed)...
> hello,
>
> maybe a simple and not interesting question butt how do i open port 20 and
> 21 for my SBS server?
>
> i had SP1 on my server butt updated it with SP2, now if i want to FTP i
> don`t have a connection. i think the port is blocked. when i look at the
> routing and ras i see FTP so does it mean it already is open?
>
> i did not change anything on my modem because it workt before installing
> SP2..
>
> can anyone help me?
>
> regards stefan