Thanks - this seems to work! I used cainfo to get the host names of
the IOCs we were trying to reach, and traceroute to get their IP
numbers. Setting EPICS_CA_ADDR_LIST to point to these two IOCs
specifically seems to let everything work with the firewall on.
Thanks!!!
On Feb 5, 2009, at 4:48 PM, Mark Rivers wrote:
Hi Chris,
I had a similar problem with the standard BNL firewall on Windows
(Trend
I think?). I think the problem was as follows:
- EPICS sends a multicast message to find the PVs on a port you have
enabled
- The client responds, but because the outgoing message was a
multicast
the incoming port was apparently not opened for that server. I proved
this by setting EPICS_CA_ADDR_LIST to specifically include the IP
address of the server, and then it worked. You could try that.
Mark
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Chris Jacobsen
Sent: Thursday, February 05, 2009 3:15 PM
To: [email protected]
Subject: Firewall configuration?
Hi - I'd like to have a firewall configured on my linux system but
when I turn it on then I get a timeout when accessing EPICS variables
on a remote system. I thought it would be sufficient to enable TCP
and UDP access on ports 5064 and 5065, since I'm running with a
"standard" EPICS build on the latest release. Can anyone suggest what
else I need to set in a firewall configuration to allow EPICS to work?
Thanks, Chris Jacobsen
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