Re: pop3 blocked by iptables

[Joe Maimon]

If iptables is not running (to be more precise: the kernel module is 
unloaded [ /etc/init.d/iptables stop]) and it still does not work:

(grep pop3 /etc/services)

netstat -a | grep pop3 | grep LISTEN

If you get nothing, odds are that Xinetd is misconfigured (as available 
in the online qpopper documentation) or  that you have configured and 
built qpopper in server mode and have not started the service. (man 
xinetd xinetd.conf)

Furthermore - If I recall correctly, Redhat does not block 
connections<->localhost with their firewall setup. So if telnet 
localhost pop3 does not work, odds are it is not a firewall issue. You 
may verify this by starting the firewall and reviewing the rules (man 
iptables)

Eric wrote:

I'm wrong,  looks like the gui isn't smart enough to show the
customizations.  If you reopen the gui it defaults to high but in actuality
it does change the file.  However, somehow in all this I have blocked telnet
to 110 even with iptables stopped?
 

Open the Terminal
man iptables
Eric wrote:

   

If I go to system settings, security level and try to customize the
     

settings
 

nothing happens... when I apply the changes and go back in it resets
     

itself
 

to high?  I am logged in as root? any ideas... since redhat 8 is set to
     

high
 

firewall I cant use qpopper for my pop3  until I get that port open (not
blocked by firewall)


Eric

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