Inetd still is there as a legacy part of UNIX. This was the old way of
starting services on demand in the old days BEFORE wans, the internet,
etc. Remember UNIX started as networked on LANS, with LANS interconnected
using UUCP. Ah those good old days before SPAM, www, and viruses.
As more security problems have been found, changes have been made to the
OS, like the move away from inetd. This also forces that only required
services are running, not a slew of services running "on demand" like
finger, ftp, tftp, etc through inetd.
-Derek
At 07:44 PM 5/12/2006, Eric Schuele wrote:
Derek Ragona wrote:
Yes it is still true today. The default system now has inetd running
nothing. And the ports now install rc scripts for these reasons.
Not arguing here... everything I've found on the web says something similar.
But why do we have inetd? I assume it solved a problem in the past, that
no longer exists. Not to mention its spotted security history.
For network daemons, when they are running in a listen mode there is no
real overhead on the system.
-Derek
At 03:41 PM 5/12/2006, [EMAIL PROTECTED] wrote:
At 04:25 PM 5/12/2006, you wrote:
inetd running is discouraged. Instead run the daemons on boot using rc
scripts. If you look back in the history, inetd running is a security
risk, and was discouraged in the 5.X releases.
Is that still really true? Waaayyy back when, inetd would have all
kinds of dangerous services enabled by default (allowing DOS stuff like
spewing "chargen" into "discard").
But that was a configuration issue, and issues with the services it
launched; not with inetd itself.
The authentication is still done within ftpd. You're just saving the
tiny overhead of running it all the time for occasional use. And inetd
does allow the tcpwrappers for anything it launches (obviously the
wrappers are compiled into many other things now, ftpd included.)
-Wayne
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