I am trying to execute some of the queries through Toad. I am getting the error

I am trying to execute some of the queries through Toad. I am getting the error ORA-12571: TNS:packet writer failure
nirvairghumanAsked:
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slightwv (䄆 Netminder)Connect With a Mentor Commented:
Is this a new install?
Can you query tables with Toad?
Can you connect using sqlplus?

For starters, disable your local firewall and try.
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nirvairghumanAuthor Commented:
yes, This is new install
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slightwv (䄆 Netminder)Connect With a Mentor Commented:
That answers one of the questions.

What about the others?
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nirvairghumanAuthor Commented:
Can you query tables with Toad?

Yes
Can you connect using sqlplus?
No,
For starters, disable your local firewall and try.
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slightwv (䄆 Netminder)Connect With a Mentor Commented:
>>Can you query tables with Toad?  Yes
>>Can you connect using sqlplus?  No,

These mean the opposite.  If you can query the tables in Toad, you are connecting to the database.  If you cannot connect through sqlplus then I wonder how you are connecting with Toad?

>>For starters, disable your local firewall and try.
 
Did you try this?  Did it change anything?
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nirvairghumanAuthor Commented:
can you query tables with toad,
Means to say some time when i execute any query and some time in the middle of fetching I get this error
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slightwv (䄆 Netminder)Connect With a Mentor Commented:
>>when i execute any query and some time in the middle of fetching I get this error

OK.  It sounds like you are having some Network Issues.

I would work with your Network Admins to help you figure them out.

If you look up the text for the ORA-12571 it mentions that you shouldn't see this error and you should contact Oracle Support.
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nirvairghumanAuthor Commented:
Do you have any other suggestions for this problem.
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slightwv (䄆 Netminder)Connect With a Mentor Commented:
You might try a ping loop from the client machine to the database server and see if you drop packets around the time you receive the ORA-12571.

ping -t -l 1 <dbserver_ip_address>
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