how can i open closed ports?

doublefailure · 07-09-2002, 09:30 PM

my comp's ports are all opened

if i shutdown a service, that port is not scanned at all..
then what is "closed port"?

--------
my friend is working on a computer (rdh7.3) on campus
but he can't get to it when he gets home..
when i do nmap..
all ports r closed..

when are ports reported as closed..
and can he open the port when he get access to the computer?

thx

pickledbeans · 07-09-2002, 09:45 PM

Is there a firewall between his home and his computer at campus? Can he ping the box at the campus from home?
How about run a traceroute from home to campus?

doublefailure · 07-09-2002, 10:10 PM

he doens't have a firewall for sure
even i don't know what firewall is..
(i have a router, is this a firewall?.. machine which can open/close ports?)

by the way
i can ping the computer
but traceroute shows only *s
* * *
* * *
like this..

pickledbeans · 07-09-2002, 10:22 PM

Quote:

Originally posted by doublefailure
he doens't have a firewall for sure
even i don't know what firewall is..
(i have a router, is this a firewall?.. machine which can open/close ports?)

by the way
i can ping the computer
but traceroute shows only *s
* * *
* * *
like this..

He may not have a firewall but, the campus network more thn likely does

One more time if you try to:
telnet ip_address
telnet friends_computer_name

Then try the same thing with ssh

Post the exact error messages

Anther hint is traceroute. It pretty much saying the campus network is not allow anything threw.

Have you friend check with tech support at the campus.

He may need to get set up with remote acctess at the
school. So that he can dail into the network. That usealy
the why it's done ... at least in my vast wordley experience

pickledbeans · 07-09-2002, 10:24 PM

Or he/she may also have to set the default gateway for the
campus network.... again the quickest way to get this question answer is via campus teck support.

doublefailure · 07-09-2002, 10:33 PM

..

school..
[eugene@eugene eugene]$ telnet ??.??.??.??
Trying ??.??.??.??...

[eugene@eugene eugene]$

my friend is offline now..
=====
traceroute www.google.com
traceroute www.yahoo.com
all give me only * * *

?....

pickledbeans · 07-09-2002, 10:38 PM

Quote:

Originally posted by doublefailure
..

[eugene@eugene eugene]$ telnet 129.62.151.151
Trying 129.62.151.151...

[eugene@eugene eugene]$

=====
traceroute www.google.com
traceroute www.yahoo.com
all give me only * * *

?....

I think I'm missing something here:
Where are you trying this from.? Your home, campus,
your's or his/her box?

doublefailure · 07-10-2002, 12:38 AM

oh it's from my home

... eugene is my machine name