EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  <20102011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  <20102011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: RE: Firewall (iptables) issues?
From: "Mark Rivers" <[email protected]>
To: "Eric Norum" <[email protected]>, "EPICS Techtalk" <[email protected]>
Date: Thu, 4 Nov 2010 10:24:46 -0500
Hi Eric,
 
I suspect the problem is that the broadcast messages from the client are not making it through the firewall.  I had a similar problem with a Windows firewall.
 
You can run ethereal on another machine and see if it is seeing the client broadcasts.
 
Mark
 

________________________________

From: [email protected] on behalf of Eric Norum
Sent: Thu 11/4/2010 10:22 AM
To: EPICS Techtalk
Subject: Firewall (iptables) issues?



Apologies if this is a FAQ.  I'm new to the intricacies of Linux firewalls.

I'm trying to get a linux system
Linux xildev2 2.6.18-194.11.3.el5.lbl1 #1 SMP Thu Sep 16 14:50:58 PDT 2010 x86_64 x86_64 x86_64 GNU/Linux
to work as a channel access client.

If I use EPICS_CA_ADDR_LIST to explicitly provide the address of my IOC things work fine.   If I leave EPICS_CA_ADDR_LIST undefined my client applications see no PVs.

I poked holes in the firewall for the channel-access ports:
iptables -L
.
.
ACCEPT     udp  --  anywhere             anywhere            udp dpt:ca-1
ACCEPT     udp  --  anywhere             anywhere            udp dpt:ca-2
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ca-1
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:ca-2
.
.
but that didn't seem to make any difference.
I restarted caRepeater after making the firewall changes.  Still no PVs.

Suggestions?
--
Eric Norum
[email protected]






Replies:
Re: Firewall (iptables) issues? Eric Norum
Re: Firewall (iptables) issues? Matthieu Bec
References:
Firewall (iptables) issues? Eric Norum

Navigate by Date:
Prev: Firewall (iptables) issues? Eric Norum
Next: Re: Firewall (iptables) issues? Eric Norum
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  <20102011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: Firewall (iptables) issues? Eric Norum
Next: Re: Firewall (iptables) issues? Eric Norum
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  <20102011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
ANJ, 04 Nov 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·