Well, I have solved the problem...
I have seen with ethereal (without filtering by destination address as I used to do) that it was trying to resolve a name through the DNS servers.
I copy here the service as it is in my tnsnames.ora:
omp =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS...
I have a similar problem.
When I try to connect to a remote database with PLSQL Developer, I get the error:
ORA-12154: TNS: could not resolve service name
However, when I use the Oracle Client tool called 'Net Configuration Assistant', it says the test is OK.
I can assert this by catching...