RE: Cisco PIX firewall

  • From: J.Velikanovs@xxxxxxxx
  • Date: Wed, 26 Jan 2005 02:16:25 +0200

In case of MTS & Firewall you can directly set ports for dispachers, for 
local_listener=LLIST92.WORLD.LV # Set alisace in tnsnames.ora
DISPATCHERS = "(address=(protocol=tcp)(host=host_monstr)(port=7021)) 
DISPATCHERS = "(address=(protocol=tcp)(host=host_monstr)(port=7022)) 
DISPATCHERS = "(address=(protocol=tcp)(host=host_monstr)(port=7023)) 

Configure Firawall on 1521, 7021, 7022, 7023.

PS As mentioned by others, port redirection have place in case of MTS.

+371 9268222 (+2 GMT)
Thank you for teaching me.

"Daniel Wittry" <daniel.wittry@xxxxxxxxx>
Sent by: oracle-l-bounce@xxxxxxxxxxxxx
2005.01.26 01:24
Please respond to daniel.wittry
        To:     <oracle-l@xxxxxxxxxxxxx>
        Subject:        RE: Cisco PIX firewall

I did this before [back when memory was a problem (so we used MTS)].

Forgive me if everybody already knows this...

Anyway, port 1521 is the starting port number, the mts server processes
communicate back to the client on a redirected port.  Therefore, you
must tell your mts config (via init.ora params) which ports are allowed
to be redirected to.  For example, you have X number of concurrent
sessions and therefore you open up x+50% ports in the range of, ohhhh,
say 15500 thru 15600.  tell the firewall that A) these ports are
bi-directional and B) sql*net traffic is the protocol. I don't remember
if ports are 1-to-1 for clients, but you could look that up.

A quick test...
You can tell Oracle NOT to redirect sql*net traffic and keep everything
on port 1521.  you will quickly bottleneck the port I/O, but at least
you will get thru your firewall (assuming 1521 is open and supports

I'm not a firewall guy, I just told the sys/netAdmins to do it and they
made it happen. I did the Oracle part. By the way, 7 years ago, not all
firewalls supported sql*net traffic - ensure your specific firewall is
certified for such.




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