On 10/02/16 19:48, Michael D. Setzer II wrote:
> The modeprobe nf_conntrack_ftp doesn't output any messge or error? Not sure 
> what it is
> suppose to output.

No, it probably won't.  Before issuing the modprobe, it would have been a good 
idea to use
lsmod to see if it was already loaded.

FWIW, as I mentioned the module doesn't get loaded when initially making 
changes to the
firewall with the GUI.  But you could use the GUI to reload and it does get 
loaded.  Once
loaded, it stays loaded unless you issue an rmmod command and the module is not 
in use.

>
> I did a test from a machine to the server running the vsftp server and using 
> ncftp or
> ncftpls,  but in the past have also used ftp with the same results.
>
> With the line disabled everything seems to work, but without it seems to 
> fail, but in
> one section changed passive mode, back it seemed to continue??
>
> These machines are in the same 192.168.7.x network connected to the same 
> switch? All are
> running Fedora 24, upgraded via dnf from 23 over the summer. With the 23, 
> never had any
> issues.

I fired up an F22 system and did an iptables-save and found it also has the line

-A INPUT -j REJECT --reject-with icmp-host-prohibited

That's about all I can say this my evening.  If I have time tomorrow I'll put 
up a vsftpd
on a system and see if I can recreate the issue.

I have no idea why I'd suggest this, other than the active/passive comments you 
made, but
I guess you can also try to open port 20 and with that line active in iptables 
see if the
results are the same.


-- 
You're Welcome Zachary Quinto
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