<div dir="ltr">I feel sorry to not able to provide more information and keeping the thread long.<div>But still there is no ufw in my /usr/sbin.<br><br>Actually, I am using an ARM development board (ORDROID-X2) which has ubuntu linaro image. I suppose that due to space limitation, this image may not include additional utility features like firewall but only the core functionality.</div>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Jun 28, 2013 at 11:57 AM, Pavan Balaji <span dir="ltr"><<a href="mailto:balaji@mcs.anl.gov" target="_blank">balaji@mcs.anl.gov</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
% sudo /usr/sbin/ufw status<div class="im"><br>
<br>
On 06/27/2013 09:52 PM, Syed. Jahanzeb Maqbool Hashmi wrote:<br>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">
Yes thats what I did before and found out this to be exact:<br>
"sudo: ufw: command not found"<br>
<br>
<br>
On Fri, Jun 28, 2013 at 11:50 AM, Pavan Balaji <<a href="mailto:balaji@mcs.anl.gov" target="_blank">balaji@mcs.anl.gov</a><br></div><div class="im">
<mailto:<a href="mailto:balaji@mcs.anl.gov" target="_blank">balaji@mcs.anl.gov</a>>> wrote:<br>
<br>
<br>
IIRC, Ubuntu has a firewall setup by default. Try this:<br>
<br>
% sudo ufw status<br>
<br>
-- Pavan<br>
<br>
<br>
On 06/27/2013 09:48 PM, Syed. Jahanzeb Maqbool Hashmi wrote:<br>
<br>
<br>
As I already read some discussion on the mpich thread and I came<br>
to know<br>
these questions before:<br>
<br>
* *Can you ssh from "node01" to "node02"?*<br>
<br>
Yes I have passwordless ssh from each node to other (and<br>
vice versa)<br>
* *Make sure the firewalls are turned off on all machines.*<br>
<br>
I am using Ubuntu Linaro, 12.04, and I have no firewall<br>
installed on<br>
all the nodes.<br>
<br>
<br>
Any other workaround :(<br>
<br>
On Fri, Jun 28, 2013 at 11:43 AM, Pavan Balaji<br>
<<a href="mailto:balaji@mcs.anl.gov" target="_blank">balaji@mcs.anl.gov</a> <mailto:<a href="mailto:balaji@mcs.anl.gov" target="_blank">balaji@mcs.anl.gov</a>><br></div><div class="im">
<mailto:<a href="mailto:balaji@mcs.anl.gov" target="_blank">balaji@mcs.anl.gov</a> <mailto:<a href="mailto:balaji@mcs.anl.gov" target="_blank">balaji@mcs.anl.gov</a>>>> wrote:<br>
<br>
<br>
On 06/27/2013 09:41 PM, Syed. Jahanzeb Maqbool Hashmi wrote:<br>
<br>
MPID_nem_tcp_connpoll(1826): Communication error with<br>
rank 0:<br>
Connection<br>
refused<br>
<br>
<br>
Sounds like a firewall problem.<br>
<br></div>
<a href="http://wiki.mpich.org/mpich/____index.php/Frequently_Asked_____Questions#Q:_My_MPI_program_____aborts_with_an_error_saying_____it_cannot_communicate_with_____other_processes" target="_blank">http://wiki.mpich.org/mpich/__<u></u>__index.php/Frequently_Asked__<u></u>___Questions#Q:_My_MPI_<u></u>program_____aborts_with_an_<u></u>error_saying_____it_cannot_<u></u>communicate_with_____other_<u></u>processes</a><br>
<<a href="http://wiki.mpich.org/mpich/__index.php/Frequently_Asked___Questions#Q:_My_MPI_program___aborts_with_an_error_saying___it_cannot_communicate_with___other_processes" target="_blank">http://wiki.mpich.org/mpich/_<u></u>_index.php/Frequently_Asked___<u></u>Questions#Q:_My_MPI_program___<u></u>aborts_with_an_error_saying___<u></u>it_cannot_communicate_with___<u></u>other_processes</a>><div class="im">
<br>
<br>
<br>
<<a href="http://wiki.mpich.org/mpich/__index.php/Frequently_Asked___Questions#Q:_My_MPI_program___aborts_with_an_error_saying___it_cannot_communicate_with___other_processes" target="_blank">http://wiki.mpich.org/mpich/_<u></u>_index.php/Frequently_Asked___<u></u>Questions#Q:_My_MPI_program___<u></u>aborts_with_an_error_saying___<u></u>it_cannot_communicate_with___<u></u>other_processes</a><br>
<<a href="http://wiki.mpich.org/mpich/index.php/Frequently_Asked_Questions#Q:_My_MPI_program_aborts_with_an_error_saying_it_cannot_communicate_with_other_processes" target="_blank">http://wiki.mpich.org/mpich/<u></u>index.php/Frequently_Asked_<u></u>Questions#Q:_My_MPI_program_<u></u>aborts_with_an_error_saying_<u></u>it_cannot_communicate_with_<u></u>other_processes</a>>><br>
<br>
<br>
-- Pavan<br>
<br>
--<br>
Pavan Balaji<br>
<a href="http://www.mcs.anl.gov/~balaji" target="_blank">http://www.mcs.anl.gov/~balaji</a><br>
<br>
<br>
<br>
--<br>
Pavan Balaji<br>
<a href="http://www.mcs.anl.gov/~balaji" target="_blank">http://www.mcs.anl.gov/~balaji</a><br>
<br>
<br>
</div></blockquote><div class="HOEnZb"><div class="h5">
<br>
-- <br>
Pavan Balaji<br>
<a href="http://www.mcs.anl.gov/~balaji" target="_blank">http://www.mcs.anl.gov/~balaji</a><br>
</div></div></blockquote></div><br></div>