RE: JDBC requests (whether from Java or from RPB via JDBCR4): how does one set a specific "from" IP address when connecting?

Source box has multiple IP addresses. Can you run a trace route from the source to the destination?
CALL QCMD
F10
TRACEROUTE RMTSYS(REMOTE)
LCLINTNETA(X.X.X.X)

Where LCLINTNETA is one of the interfaces on the source system. Run for each source IP address. See where the trace fails and pass to the network engineers.

Chris Bipes
Director of Information Services
CrossCheck, Inc.
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of James H. H. Lampert
Sent: Wednesday, December 03, 2014 9:57 AM
To: Midrange Systems Technical Discussion
Subject: Re: JDBC requests (whether from Java or from RPB via JDBCR4): how does one set a specific "from" IP address when connecting?

Yesterday, I wrote:

We're having an issue with communication between two midrange boxes on
opposite sides of a firewall, with the requests coming from a box that
has multiple IP addresses. We've got a proprietary protocol connecting
just fine, but JDBC isn't connecting at all, and we suspect it's because
the firewall is rejecting the "from" addresses.

Latest news is that they supposedly opened up (at least on a temporary
basis) ports 449, 8470, 8471, 8476 in the firewall to traffic from
anywhere, to the point where (at least in theory) we could use SQuirreL
to connect to it from here, but still nothing is getting through. (But
at least that gives their firewall people a way to work the problem on
their own.)

(Needless to say, that's one more reason why I can't specify who, what,
or where, or what IP address!)