[CentOS] Understanding iptables

Thu Jul 10 22:59:23 UTC 2008
William L. Maltby <CentOS4Bill at triad.rr.com>

On Thu, 2008-07-10 at 15:40 -0700, MHR wrote:
> On Thu, Jul 10, 2008 at 3:17 PM, Barry Brimer <lists at brimer.org> wrote:
> > Quoting MHR <mhullrich at gmail.com>:
> >
> >><snip>

> >> system-config-securitylevel-tui to open up ports 513 and 514, but that
> >> doesn't seem to do the job, either.
> >
> > I could be remembering this wrong, but I believe these are udp, not tcp.
> >
> > Barry
> 
> According to http://www.spirit.com/Resources/ports.html, the udp
> services on those ports are who and syslog....

>From the authoritative /etc/services

:g/51[34]/p
login           513/tcp
who             513/udp         whod
shell           514/tcp         cmd             # no passwords used
syslog          514/udp

Just thought you should know that you have this and /etc/protocols
locally so you don't have to trust some unknown website.

And it's faster to lookup locally, of course.

> 
> Thanks.
> 
> mhr
> <snip sig stuff>

-- 
Bill