Re: No Services....
From: Whoever (nobody@devnull.none)Date: 10/07/02
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From: Whoever <nobody@devnull.none> Date: Mon, 07 Oct 2002 17:20:48 GMT
Firstly: before you go any further: get all the security updates for your
distro and install them now! Then re-boot (you could just re-start the
services affected by the updates, but since you don't know how to stop the
services, you probably don't know how to restart them).
On Mon, 7 Oct 2002, John wrote:
>
> Also, is it right that if I don't have any services running then nobody
> can connect to my computer, I mean, isn't there anyway round this, is it
> still possible to spawn shells and get in by other means... Surely the vast
> subject of Linux security can't revolve around something as simple as
> this.....
Correct, but you should also firewall the computer with iptables/ipchains
(preferably iptables). Follow a belt and braces approach.
> I've tried shutting down all services, but after running nmap against
> my own box, it seems that there are still some ports open (ports 22 SSH, 25
> SMTP and 6000 ???? can't remember ), are these services supposed to remain
> open and if not how do I shut them down, none of these services are present
> in /etc/inetd.conf so do I shut them down another way...
>
Services are started either by a server process or the inetd "super
server". SSH and SMTP have their own server. Probably sshd and sendmail
respectively.
The command
netstat -avpn
will reveal what processes are listening on what ports.
You have not said what distro you are running so it is not possible to
tell you how to shut down the services.
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