ISP Port Blocking

Hello,


Is there a script or something that will show which ports my ISP is
blocking?

 

What are you trying to do and what kind of trouble are you having doing
it?

My understanding is that many ISPs including pacbell are going to be
blocking port 25 so that their proxified users won't be effective at
being spam injectors.

Pacbell has been known to block 135 in the past to counteract the
blaster worm, and some providers have blocked 1214 because of kazaa.

 

If you run a script (think about what you are trying to appear to do)
then you will find all ports blocked when they terminate your account
for scanning.

Me

 

That's exactly it. I went on the support chat thing and asked them to
unblock port 25 and they said that they did. However, it still doesn't
work. I can receive email from my own servers.

 

John wrote:

That's 'exactly it' meaning what? That you have some need to be able to
use port 25 with anything other than your own pacbell server? What are
you trying to do?

Don't let any chat support techs blow smoke up your skirt. Some of them
only know what is in their cookbook and some of them can't even read
/that/ and some of them are actually helpful -- but the tech support for
big providers goes to the lowest bidder.

That doesn't surprise me. But you didn't describe exactly what it is
that doesn't work. The better you describe exactly what you are trying
to do, the better the help is going to be around here.

We are going to have to get some things clarified. When you pop/receive
mail from your provider's server, you are typically doing it on port
110. When you smtp/send mail to your provider's server, you are
typically doing it on port 25.

If you are wanting to use some other mail provider's smtp service, these
days it is highly likely that you should be sending it over some other
port than 25. Which mail server *OUT* not *receive* are you wanting to
use?

 

What does 'my own servers' mean in this context?

Are you saying that you are wanting to have a/ your own/ mailserver
sending and receiving mail using the/your pacbell DSL IP? Or when you
say 'my own servers' you are talking about pacbell servers?