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Subject: Re: caget can't connect to soft ioc on host with multiple NICs
From: Dirk Zimoch <dirk.zimoch@psi.ch>
To: tech-talk@aps.anl.gov
Date: Thu, 04 Jul 2013 09:44:43 +0200
On 27.06.2013 16:33, Brian McAllister wrote:
On 6/27/2013 at 7:18:58 -0000, Mark Rivers wrote:

   >  My next guess is that there may be a firewall running on your
   >  system. Is iptables running?

You are correct.  Inbound connections on eth1 were blocked and I had eth0
restricted to SSH/tcp while I was setting up the machine.  Normally I allow
all traffic from the local subnet.

Opening eth0 (or eth1) fixes the problem.  If I open both, then I need to
set EPICS_CA_AUTO_ADDR_LIST=NO and use EPICS_CA_ADDR_LIST.

I still don't understand why it didn't work from the local host.  iptables
accepts all traffic from the loopback.  Why doesn't that work for CA ?

- brian



BTW: We use iptables to block the second network port for CA instead of tweaking EPICS_CA_ADDR_LIST.

Dirk

References:
Re: caget can't connect to soft ioc on host with multiple NICs Brian McAllister

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