Fedora-21 firewall advice?

Ed Greshko ed.greshko at greshko.com
Sun Jan 18 21:56:09 UTC 2015


On 01/19/15 05:32, Gordon Messmer wrote:
> On 01/18/2015 04:44 AM, Heinz Diehl wrote:
>> Opposed to what is written in this article, firewalld leaves the
>> system open even after upgrading with "--product=nonproduct", which I
>> verified some minutes ago on a laptop upgraded from F20 to F21
>> yesterday evening.
>
> Use 'iptables -L -n -v'.  You are probably mistaking the allow-all-on-lo rule for an entirely open rule.  Firewalld's default is not "open"

Yes.  It is certainly *NOT OPEN* as has been suggested....

Trying to connect to sendmail on a newly minted F21 system from a F20 system....

[egreshko at meimei ~]$ telnet 192.168.1.222 25
Trying 192.168.1.222...
telnet: connect to address 192.168.1.222: No route to host

Then opening up the port...

[egreshko at meimei ~]$ telnet 192.168.1.222 25
Trying 192.168.1.222...
telnet: connect to address 192.168.1.222: Connection refused

Since sendmail isn't listening on the port.

-- 
If you can't laugh at yourself, others will gladly oblige.


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