Re: Can't open port in firewalld

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On Sat, 18 May 2013 14:02:06 -0700
"T.C. Hollingsworth" <tchollingsworth@xxxxxxxxx> wrote:

> On Sat, May 18, 2013 at 1:47 PM, আনন্দ কুমার সমাদ্দার
> <ananda@xxxxxxxxxxxxxx> wrote:
> > Hello all,
> >
> > So I've found out that by default my script controlled ethernet
> > connection is in the public zone in firewalld.  I however cannot
> > open a port for Transmission, the torrent client.  I set
> > Transmission to use the static default port 51413.
> >
> > I then do the following:
> >
> > firewall-cmd --zone=public --permanent --add-port=51413/tcp
> > firewall-cmd --zone=public --permanent --add-port=51413/udp
> >
> > Transmission shows the port as closed.  It's definitely a firewalld
> > issue.  As soon as I disable firewalld by using systemd the port is
> > shown as open in Transmission.
> >
> > Am I doing something wrong here?
> 
> Well, if you use `--permanent` the setting won't take effect until
> after firewalld (or your computer) is restarted, but starting and
> stopping firewalld like you did to test it should have taken care of
> that.  (You can call `firewall-cmd` without `--permanent` to get the
> settings to take effect immediately.)
> 
> Do you have a router in between your machine?  You might need to
> open/forward the port in that too.
> 
> Otherwise, transmission-gtk might be lying about the port being open.
> (I've been using Deluge instead of Transmission for what seems like
> ages now, but I do recall the port open checking thingy in
> Transmission not working so good before.)  Try checking the port with
> `nmap` or ShieldsUP [1] and see if that reports it as open.
> 
> -T.C.
> 
> [1] https://www.grc.com/x/ne.dll?bh0bkyd2

I tested the port on ShieldsUP and it informs me that it is 'stealth'
mode so obviously not open.  I don't think the router is the problem as
when I disabled the firewall the port was shown as being open.  I'll
give Deluge a shot.

Ananda
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