How to make port 23 Telnet stealth?

Windows XP Pro on a very simple single PC installation with a USB ADSL modem (D Link DSL-302G).

Several security sites say port 23 is closed and should be stealth.

I have Telnet stopped and disabled in Services.

I have tried ZoneAlarm and Outpost, and can't get it to say stealth.


ZoneAlarm doesn't have a setting to cloak the port as far as I'm aware, and neither does my modem?

Am I missing something?

 

I stealthed my port 113 by directing it to a dummy internal IP address. I picked it up on Steve Gibson's site.

 

Thanks for the reply.

Although I'm familar with Gibson Research, I have no idea how to, and have never done this before.

What's the URL or info please?

 

Bumpy.

 

http://grc.com/default.htm

I don't see it up there anymore, but I forwarded port 113 to a nonexistent IP address. That way I fixed the only port I had unstealthed in my NAT firewall. I don't see why it wouldn't work for any other port. ZoneAlarm blocked it, though.

 

@Halo, yes the sliders are both set to Stealth.

The sites that told me that it wasn't were Gibsons and PCFlank.


I think it has something to do with my modem, as when I was on dial-up ZoneAlarm stealthed the port in an identical setup.

Unfortunately, there are no advanced settings in the modem that I can use.


Thanks for the replies to both of you, I appreciate it.

Guess I have to live with it for the time being.....



EDIT: I even added an expert rule and blocked the port, but it's still closed.