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From: Yiming Sun <yiming.sun@gmail.com>
Date: Mon, 26 Mar 2012 15:54:38 -0400
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 <CABxBLH9+FL2DP-M8ZSD-XTcqBjwfDZSFKnEooTikBQkLNr4Opg@mail.gmail.com>
Subject: Re: what other ports than 7199 need to be open for nodetool to work?
To: user@cassandra.apache.org
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Thanks Nick -- I didn't know about this ticket.  Good to know.

Yes, nodetool doesn't do anything special - but I still wish I could use
nodetool to examine other nodes, instead of having to ssh to other nodes
first and then nodetool each one (i am lazy :-).

-- Y.

On Mon, Mar 26, 2012 at 3:50 PM, Nick Bailey <nick@datastax.com> wrote:

> You are correct about the second random dynamic port. There is a
> ticket open to fix that as well as some other jmx issues:
>
> https://issues.apache.org/jira/browse/CASSANDRA-2967
>
> Regarding nodetool, it doesn't do anything special. Nodetool is often
> used to connect to 'localhost' which generally does not have any
> firewall rules at all so it usually works. It is still connecting to a
> random second port though.
>
> On Mon, Mar 26, 2012 at 2:42 PM, Yiming Sun <yiming.sun@gmail.com> wrote:
> > Hi,
> >
> > We opened port 7199 on a cassandra node, but were unable to get a
> nodetool
> > to talk to it remotely unless we turn off the firewall entirely.  So what
> > other ports should be opened for this -- online posts all indicate that
> JMX
> > uses a random dynamic port, which would be difficult to create a firewall
> > exception unless writing a custom java agent.  So we just wondering if
> > cassandra nodetool uses a specific port/port range.  Thanks.
> >
> > -- Y.
>

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Thanks Nick -- I didn&#39;t know about this ticket. =A0Good to know.<div><b=
r></div><div>Yes, nodetool doesn&#39;t do anything special - but I still wi=
sh I could use nodetool to examine other nodes, instead of having to ssh to=
 other nodes first and then nodetool each one (i am lazy :-).</div>

<div><br></div><div>-- Y.<br><br><div class=3D"gmail_quote">On Mon, Mar 26,=
 2012 at 3:50 PM, Nick Bailey <span dir=3D"ltr">&lt;<a href=3D"mailto:nick@=
datastax.com">nick@datastax.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">

You are correct about the second random dynamic port. There is a<br>
ticket open to fix that as well as some other jmx issues:<br>
<br>
<a href=3D"https://issues.apache.org/jira/browse/CASSANDRA-2967" target=3D"=
_blank">https://issues.apache.org/jira/browse/CASSANDRA-2967</a><br>
<br>
Regarding nodetool, it doesn&#39;t do anything special. Nodetool is often<b=
r>
used to connect to &#39;localhost&#39; which generally does not have any<br=
>
firewall rules at all so it usually works. It is still connecting to a<br>
random second port though.<br>
<div class=3D"HOEnZb"><div class=3D"h5"><br>
On Mon, Mar 26, 2012 at 2:42 PM, Yiming Sun &lt;<a href=3D"mailto:yiming.su=
n@gmail.com">yiming.sun@gmail.com</a>&gt; wrote:<br>
&gt; Hi,<br>
&gt;<br>
&gt; We opened port 7199 on a cassandra node, but were unable to get a node=
tool<br>
&gt; to talk to it remotely unless we turn off the firewall entirely. =A0So=
 what<br>
&gt; other ports should be opened for this -- online posts all indicate tha=
t JMX<br>
&gt; uses a random dynamic port, which would be difficult to create a firew=
all<br>
&gt; exception unless writing a custom java agent. =A0So we just wondering =
if<br>
&gt; cassandra nodetool uses a specific port/port range. =A0Thanks.<br>
&gt;<br>
&gt; -- Y.<br>
</div></div></blockquote></div><br></div>

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