NSCA 2.7.2 errors

[radius.god at gmail.com]

Running on CentOS5, x86-64.

When attempting to run send_nsca to get data back to one of our
central Nagios systems, I'm getting these two messages as output:

Error: Server closed connection before init packet was received
Error: Could not read init packet from server

Some searching lead me to these being errors in the source code, but
I'm no developer and have no idea what's _really_ going on.

I ran tcpdump and compared to when another working machine sends it's
data.  The only thing that appears to be different is that the TCP
session never gets to a point to pass the HTTP paylod to the NSCA
daemon.

I'm currently checking on the possibility of a firewall or some other
"intelligent" stateful packet/session inspection, etc.  But,
unfortunately, it's not my network, so even if there is, I don't know
that it could be changed.  <sigh>

As a side note, which *could* be the entire cause of the issue, the
other machines I have this working on are all CentOS 4.4.  Maybe
something odd with CentOS 5?

Any help, thoughts or insight would be appreciated.

Thanks.

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