Iputils issue, when connecting with netcfg.

I hope what I will do is correct to put it here.
I updated today iputils and suddenly I couldn't connect to my networks anymore.
I'm not an expert and I don't know exactly what was going on.
1) I tried to connect using netcfg to wireless with WPA security, and the result was dhcp lease attempt failed.
2) I tried to connect using netcfg to ethernet, same problem as before.
3) I used dhcp without netcfg and it connected correctly.
then I downgraded iputils and netcfg worked again.

Hi JimSmith,
Thanks for reply.
TNS entry as below:
ORCL_DB =
(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 91.198.252.83)(PORT = 1521)) )
(CONNECT_DATA = (SID = orcl) (SERVER = DEDICATED) ) )
It works fine if I choose TNS (Network Allias: ORCL_DB).
For the Basic setting:
Hostname = 91.198.252.83
Port = 1521
SID = orcl
The error I received when connecting to db based on Basic option is Failure -Io exception: The Network Adapter could not establish the connection.
Below are the entries of SQLnet.ora. Any entry should I add into sqlnet.ora?
SQLNET.AUTHENTICATION_SERVICES= (NONE)
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
Appreciate your comment.
Thanks.
Regards,
Jia

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