Close ports

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi
I have read all the hardening docs proposed on this discussion group which i
found really helpful. I have so far upgraded all my servers etc with the
latest service packs and security updates but I would like to close all ports
but the required on say for instance my smpt server i closed everything but
dns ports and 25 but i could not resolve names where do you guys get the
information on what ports can be closed.

many thanks for any help you may be able to give me

ca
 
You need to open TCP/UDP 53 for your DNS queries..
Other than that depends on your services or requirements you may want to
open those ports as well...
http://www.portsdb.org this can be somwhat usefull...
 
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