Andy George wrote:
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----- Original Message ----- From: "steve" <[EMAIL PROTECTED]>
To: "CLUG" <[EMAIL PROTECTED]>
Sent: Sunday, June 20, 2004 5:28 PM
Subject: open ports...
I've set up a no-ip account which seems to work fine ( I can ping and get a sensible name back ). However, I can't access anything behind the router. I've set up routes to a web server, with no luck. I downloaded a bit of software that probes the ports, and find that ftp, telnet, pop3, smtp and 1723 (?) are open ( I also find that ihug seems to guard against the monitoring of ports! ).
OK, but when I try to route incoming on ftp to port 80 on one of my
FTP is port 21. Port 80 is generally accepted as an Apache/IIS (http) port.
Andy,
Only by convention is port 21 the one to use by default for ftp connections ( see /etc/services for a more complete list ). But I can run whatever I want to listen on that port, and I can route incoming connections on port 21 to one of my servers running an http server on port 80 if I so wish ( so internally, I don't need to supply a port to the website, but externally I do ). In fact, it's a simple way of adding to the security of your network... very little improvement I hasten to add.
What I'm really after is a recommendation for a new ISP that allows me to do what I want.
Cheers,
Steve
[snip]
