i have 2 db north & south, when i connect south from north after update entry in north tnsnames.ora
[oracle@test ~]$ sqlplus us01/us01@SOUTH
SQL*Plus: Release 12.2.0.1.0 Production on Sat Dec 17 11:19:54 2022
Copyright (c) 1982, 2016, Oracle. All rights reserved.
ERROR:
ORA-12170: TNS:Connect timeout occurred
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