how to tell if my ISP is blocking email & web ports

[fbsd_user]

Thanks to all of you that responded.

I did not want to install Apache just to have something listening
on port 80. So I edited /etc/services and commented out the
http 80 statements and the telnet 23 statements and them copied
the telnet tcp statement and changes it's port to 80.
Enabled inetd in rc.conf.

I used one of my LAN PC's to telnet into to port 80 and it worked.
I then called my friend with winme box who uses different ISP.
He logged on and used native dos to try to telnet into my
port 25 and 80. In both cases he was not able to connect to my
IP address.
This proves that Adelphia cable service is blocking those 2 ports.

-----Original Message-----
From: owner-freebsd-questions at freebsd.org
[mailto:owner-freebsd-questions at freebsd.org]On Behalf Of michael
Alexander
Sent: Wednesday, January 21, 2004 5:09 PM
To: freebsd-questions at freebsd.org
Subject: RE: how to tell if my ISP is blocking email & web ports

> -----Original Message-----
> From: owner-freebsd-questions at freebsd.org
> [mailto:owner-freebsd-questions at freebsd.org] On Behalf Of
fbsd_user
> Sent: Wednesday, January 21, 2004 2:39 PM
> To: Dinesh Nair
> Cc: freebsd-questions at FreeBSD. ORG
> Subject: RE: how to tell if my ISP is blocking email & web ports
>
>
> My friends PC is an MS/Windows 98 box.
> I know all windows system have telnet in command.com.
> Which is reachable from start/run and opens an native dos window.
>
> Would anybody know the syntax of the native dos telnet command
>  to include the port number to use?
>
> telnet xxx.xxx.xxx.xxx would get me to the telnet port
> at that IP address.

I believe Just add the port number at the end...
Telnet xxx.xxx.xxx.xxx 25
For testing a mail server connection for example.  I don't have
anything
that old to test it on though.  Works in XP for sure, I use it
frequently.

-Mike

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