Re: How do I disable (close) ports?
On Tue, Dec 04, 2001 at 09:18:09PM +0100, J. Paul Bruns-Bielkowicz wrote:
> I disabled all but a few ports in /etc/services, but I have
> tcp 0 0 pa237.olsztyn.sdi.t:111 188.8.131.52:1064
> when I netstat my machine. What exactly does this mean? I just want
> 25/tcp open smtp
> 37/tcp open time
> 66/tcp open sql*net
> 80/tcp open http
> 110/tcp open pop-3
> 443/tcp open https
> 3306/tcp open mysql
> open. How can I close ports 111 and 859? They are not enabled in
may you take a look at the corresponding man pages:
services, inetd.conf and inetd:
services is a plain ASCII file providing a mapping between
friendly textual names for internet services, and their
underlying assigned port numbers and protocol types.
The presence of an entry for a service in the services
file does not necessarily mean that the service is cur-
rently running on the machine. See inetd.conf(5) for the
configuration of Internet services offered. Note that not
all networking services are started by inetd(8), and so
won't appear in inetd.conf(5). In particular, news (NNTP)
and mail (SMTP) servers are often initialised from the
system boot scripts.
A port is "open" if there is a programm listening on it and answering
incomming requests. It has nothing to do whether it is mentioned in
/etc/services or not.
Hope this helps and fit your needs