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Old 03-15-2003, 01:27 AM   #1
joesbox
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Registered: Feb 2003
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figuring out what ports are open


here is the deal. now i am not sure or not but i believe that my isp has closed every port associated with my ip. now i am not sure if it is my modem or the isp itself that is blocking. i use kazaa and people can download from me so that means that there is a port open assoc with this app. (if i am wrong please tell) here is the question, is there a way to ping all ports to see what is open?? now i think that i will have to do it from outside but i don't know. any suggestions????
 
Old 03-15-2003, 02:22 AM   #2
rmartine
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http://www.insecure.org

Read up on how to use the nmap utility.

Good Luck
 
Old 03-15-2003, 05:13 AM   #3
paranoid
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If you want to know what ports are open on your machine without regard for firewalls, lsof(8) with the -i option is your friend.

If you don't know how to read your firewall config, or you suspect that your ISP is filtering, then use nmap as rmartine said, and if you find that some ports are blocked, use tcptraceroute afterwards to find out WHERE the blocking is going on.

And yes, it'll have to be done from outside.
 
Old 03-15-2003, 05:59 AM   #4
joesbox
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thanks guys i will have to have a friend check this out for me. i don't have a computer that is able to connect outside yet. i can't even do it at work. admins are a pain.
 
Old 03-15-2003, 07:02 AM   #5
paranoid
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Talking

Quote:
Originally posted by joesbox
i can't even do it at work. admins are a pain.
Nah, users are a pain. Fancy someone wanting to break my lovingly configured firewalls wide open just so he can test something at home...
 
Old 03-16-2003, 01:15 PM   #6
m0rl0ck
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You can get a pretty thourough scan here:
http://www.computercops.biz/modules....me=TCP_Scanner
 
Old 03-16-2003, 03:36 PM   #7
joesbox
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Quote:
Originally posted by paranoid
Nah, users are a pain. Fancy someone wanting to break my lovingly configured firewalls wide open just so he can test something at home...
actually i am an admin and the ones that regulate me are a pain. not allowed to install anything on puter without written authorization and they check. if they can't check then they come down and check manually.
 
Old 03-18-2003, 05:44 PM   #8
unSpawn
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actually i am an admin and the ones that regulate me are a pain. not allowed to install anything on puter without written authorization and they check. if they can't check then they come down and check manually.
...which indicates to me you're working in some professional environment. If you don't know what "Company security policy" and enforcing it means wrt those you work with/for, IMNSHO you've got no business calling yourself a professional administrator.
 
  


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