Do I need these ports open?
Andy Green
andy at warmcat.com
Thu Apr 19 06:56:29 UTC 2007
Simon Slater wrote:
> Hi all,
>
> Just a quick question arising from following another thread. Here is
> the result of nmap on a FC6 box:
>
> $ nmap localhost
This is a misleading test... those ports have something listening on
them, that is not the same as being "open" to the outside. You have
done the nmap locally from inside your machine's firewall on the
loopback interface, the results will be very different indeed if you
instead do the nmap from a second machine on your LAN against your
external interface (eg, eth0).
The only port that should be actually "open" out of the box is the sshd
one on 22.
-Andy
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