Great Circle Associates Firewalls
(April 1996)
 

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Subject: Access of cc:Mail thru Firewall
From: "MURALIKRISHNAK" <MURALIKRISHNAK @ inf . com>
Date: Fri, 26 Apr 96 14:15:40 EST
To: Firewalls @ GreatCircle . COM

     
     
     Hi,
     
     I have a problem, which is given below :
     
     We have two separate networks - Novell netware and Windows NT.  We 
     have installed cc:Mail PO on Netware and connected thru Gateway 
     services of NT to access the cc:Mail PO for the NT users. The users
     of NT are able to access the cc:Mail services with intermittant probs.
     
     For these probs., we decided to install a cc:Mail PO on NT itself to 
     avoid the presence of the gateway but thru a firewall.
     
     The PO is created on a NT Server
     The firewall is configured for respective IP Addresses A PC is 
     installed with DOS/NWClient/WfWG/PCTCP Selected NetBUEI protocol as 
     default
     
     
     We are able to exchange smaller messages
     When a ADE propagation/message of >= 4K is sent, it gives the 
     following error:
     
     Data connection lost
     FTP Software Net_Read Error : Operation would block
     
     
     We have tried with a different firewall, it works irrespective of 
     message size. But, we have compared the both the firewalls.  There 
     does not seems to be any difference.
     
     Can anyone give suggestion to overcome this problem?
     
     TIA - Murali
     
     (K Murali Krishna, Infosys Technologies Ltd, BANGALORE)


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