FreeTDS Development Group

["Michael Starling" <mike AT barkingdogstudios.com>]

Thanks for the reply...

> TDS is a tcp protocol.  
> ... 
> You need only one port, and connections are always and only formed by
> the client connecting to the server.  Unlike FTP, it uses only one
> channel: the server does not make an inbound connection.  

Okay, thanks for confirming that for me.

> One of two things is happening:
> 1.  Whatever's answering you on port 4000 isn't Sybase.  When you
> connect to it, it drops the connection because your login packet tastes
> bad.  
> 2.  Sybase answers, but something prevents its reponse from reaching
> you.  

Hmmm... the database hosting company says they have other clients connecting
to it, so I'm reasonably certain it's Sybase.  But perhaps it's something
else in the way...

> That assumes, as your original message showed, that you're using the TDS
> 5.0 protocol, which you can verify that with TDSDUMP.  Here I try to
> connect to my X server (which is listening but doesn't understand TDS!):
> ...

I did the same thing and the dump looks similar.  I noticed you got the
#20004 (Read failed), as I did... although sometimes I got #20006 (Write
failed) on a few attempts.  I guess that's basically the same issue.

Would TDS 5.0 be incompatible with some flavours of Sybase (they said it's
"ASA 8")...?  I see in the FAQs that the current version supports 4.2, 5.0,
7.0, and 8.0 - and can connect to any Sybase (or Microsoft) server - but
would I have to change the protocol version used?

(I did try the tsql test after setting the $TDSVER value to "7.0", "8.0",
etc., but got basically the same results...).

Alright then - I'll have to contact them again and see what they can tell me
about the server setup.  Maybe there's some weird port-forwarding thing
going on in the firewall that they overlooked. :P  (so it looks like I'm
using 4000, but is actually trying to connect to their server on a different
one?)...

Thanks again! :)
Mike.


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