Re: how to detect hack attempts.

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On Thursday, February 20, 2020 10:44:16 PM MST Ed Greshko wrote:
> On 2020-02-21 13:34, Samuel Sieb wrote:
> 
> > On 2/20/20 7:47 PM, Ed Greshko wrote:
> > 
> >> Oh, never mind.  Wrong system.  The "default" rules for
> >> FedoraWorkstationso seem "odd".
>
> >
> >
> > Not really.
> >
> >
> >
> >> [root@f31m ~]# firewall-cmd --info-zone=FedoraWorkstation
> >> FedoraWorkstation
> >>    target: default
> >>    icmp-block-inversion: no
> >>    interfaces:
> >>    sources:
> >>    services: dhcpv6-client samba-client ssh
> >>    ports: 1025-65535/udp 1025-65535/tcp
> >
> >
> >
> > Any critical system daemons are 1024 and below.  The reason the high ports
> > are left open is for user applications to be able to communicate without
> > users having to figure out the firewall.
> 
> Yeah, which is the reason for quotes around odd.
> 
> I understand the reasoning to make it easier on users.  It is just something
> I wouldn't have done. I can envision someone configuring a service to run
> on the higher ports which can be compromised and then disables selinux
> because they run into it trying to protect them. 
> Maybe I shouldn't pity them.  :-)

It's not just odd, it's a security nightmare. Processes running directly as 
the user have more privileges than most daemons, in fact.

-- 
John M. Harris, Jr.
Splentity

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