On 4 Mar 2001, Dominic Mitchell wrote:
>
> Hi,
>
> Ok, I am making a firewall fast before I get hit. I downloaded
> pmfirewall-1.1.14 which is very easy to configure --- it is
> targeted for users with low knowledge of ipchains et al ... me :(
>
> I will take some time to read the Howto, but it possible just to
> tweak the firewall.
>
> For now I need to know which services are running and on which
> port. I am not running a server, thus I have disabled the telnet,
> ftp, services. I know that sendmail (smtp) is runnung on port 25,
> but my knowledge is limited. How can I find this information
> quickly?
>
> Thanks,
>
> Dominic.
>
To find out what services use what ports, look in /etc/services.
To see what ports you need open, start by closing off all the privelaged
ports, and then open the ones you need for the services you connect to
the net to use.
Blocking 0 to 1023 is a good start. Then open up 25 if you are running
a mail server. If you do not run a local name server, then you will
need port 53 open. I have not used pmfirewall, but it will probably
walk you through what ports to leave open by asking you about the
services you use. It will probably also limit connections to some
services to specific computers...
Mikkel
--
Do not meddle in the affairs of dragons,
for you are crunchy and taste good with ketchup.
_______________________________________________
Redhat-list mailing list
[EMAIL PROTECTED]
https://listman.redhat.com/mailman/listinfo/redhat-list
