Oh-ho, ping localhost is just fine there. Jump onto the domain controller for another check. I reset the TCP/IP stack on one server using netsh, and reconfigure the IP4 settings. To check, though, I jump onto the other member server – yup, localhost major fail. Pinging the server’s own IP is just fine, and network operations between the domain servers seem fine. Since the loopback address is a pretty fundamental part of IP networking, I start wondering if something is wrong with the server builds – I didn’t do them myself, but I had installed all the DC, file and print server roles with no problems. Maybe something strange in the hosts file? Nope. Run up netstat, port 1571 (Oracle default) is listening, blah blah blah. Oracle services were up and running, reboot, same thing. After a bit more digging, it seemed we couldn’t connect to default database instance. Great, open a SqlPlus connection, enter connect sys as sysdba… and, access denied. The installation went ok, with one minor stupidity, and we were all ready to start configuring the database. I’m not fond of Oracle installations on Windows at the best of times, but Oracle XE is a small database engine, limited to 1 GB of memory usage. We had a Windows 2008 R2 domain controller and two member servers, all sitting on a VMWare ESX host. With much urgency, a project I was involved with required an install of Oracle XE and Apex on a server – any server – that we had supplied as part of a small environment built in network-isolated site.
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