I installed Oracle 10g server Express edition on a System(say host-a[100.101.102.103])
And I tried access the database from another system(say host-b[100.101.102.104]) using the command on the sql command line
"**connect username/password@100.101.102.103:1521/XE**"
But it says something like
request timeout.ORA-12170:TNS:Connect timeout occured
... where I made mistake....
Please someone help me.
You most likely have a firewall that prevents connecting to your database by silently dropping the network packets.
Is the database on a Windows server with the Windows Firewall activated? If yes, you need to create an exception for port 1521 (and potentially for 2030 and 8080 as well).