Oracle Enterprise Manager issues

Question

We are experiencing difficulties connecting to http://localhost:1158/em and also the ISQL link from the EM page when and if the EM console does manage to load.
Problem 1 -:
New Oralce 10G database installed ok no errors. Data imported from old Oralce 8 server. New schemas etc created and all was working well. Then we created a secondary 10.*.*.* address for users to connect via our VPN.
Our EM home page seems to be a bit of a hit or a miss. The database is working fine and the listener is running. We can connect,to the prod DB via SQL or telnet we just can't access via EM. We have tried restarting the dbconsole using emctl start dbconsole but to no avail simply says running.
(additional info) - We have also updated the hosts file to point at both the 192.*.*.* address and the 10.*.*.* address'
Problem 2 -
Even when EM was loading when clicking the ISQL link from EM control page we get a message "page can't be displayed check network connection" message in the browser, Again we have ensured the ISQL is started (response started) but it doesn't seem to connect to ISQL via the browser (firefox or Internet Explorer).
Any assitance in any of these matters most grealy appreciated our box is live prod and we are getting a bit nervous and desperate to resolve

Answer 1

Thanks for the reply
Q1 -please give us the OS.
A1- OS is AIX5.3
so far i have a couple of thoughts, first, when you say :
We have also updated the hosts file to point at both the 192.*.*.* address and the 10.*.*.* address'
Q2 - what do you mean exactly; can you please paste the hosts file or make sure you don' t have the same hostname mapped to 2 IP addresses.
in the hosts file if you map localhost to 192..., do you use the hostname for the address 10....?
A2 - Sorry not at work at the moment and don't have access to host file but i do have the hostname mapped to both my 10 & 192 IP ranges. Although and i hasten to add this has worked ok for a couple of weeks and we even did a couple of reboots in the time after the configuration was altered 2 weeks ago.
Up unitl two days ago we could connect to the EM via either 3 below
http://localhostname:1158/em
http://192.*.*.*:1158/em
http://10.*.*.*:1158/em
Q3 - Did you check whether the issue is occurring only when connecting locally or only when connecting via VPN or just random?
A3 -More a random thing i think though i'm not 100% on the VPN side as i haven't checked that yet, very valid point though
Q4 - Finally - for isqlplus, I assume you already checked that the process is running (isqlplusctl start). If so, in alternative to the button on the EM console, you can use the URL http://localhost:5560/isqlplus
(the port usually 5560, but it is in the C:\oracle\product\10.2.0\db_\install\portlist.ini file as well as the EM ports).
A4 - isqlplusctl is process is running. have also tried http://localhost:5560/isqlplus but i get page cannot be displayed even though the port is set to 5560 in the portlist.ini. I have also checked pop up blockers firewall ports etc on the windows client. i know this would have no bearing but thought i'd check anyway all appear fine