OEM 13CC WEBPAGE SAYS “This site can’t be reached took too long to respond”
Cause:
When trying to access the OEM GUI webpage, i face the error and not able to access the page
Workaround:
Check the firewall status from the host using systemctl
[root@oem oracle]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2021-11-25 11:42:59 IST; 6h ago
Docs: man:firewalld(1)
Main PID: 798 (firewalld)
Tasks: 2
CGroup: /system.slice/firewalld.service
└─798 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid
Nov 25 11:42:53 oem systemd[1]: Starting firewalld - dynamic firewall daemon...
Nov 25 11:42:59 oem systemd[1]: Started firewalld - dynamic firewall daemon.
If running, then stop the firewall daemon
[root@oem oracle]# systemctl stop firewalld
Check the status of firewall
[root@oem oracle]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
Active: inactive (dead) since Thu 2021-11-25 17:50:05 IST; 1h 10min ago
Docs: man:firewalld(1)
Process: 798 ExecStart=/usr/sbin/firewalld --nofork --nopid $FIREWALLD_ARGS (code=exited, status=0/SUCCESS)
Main PID: 798 (code=exited, status=0/SUCCESS)
Nov 25 11:42:53 oem systemd[1]: Starting firewalld - dynamic firewall daemon...
Nov 25 11:42:59 oem systemd[1]: Started firewalld - dynamic firewall daemon.
Nov 25 17:50:04 oem systemd[1]: Stopping firewalld - dynamic firewall daemon...
Nov 25 17:50:05 oem systemd[1]: Stopped firewalld - dynamic firewall daemon.
If SELINUX is enforced, then stop it
[root@oem oracle]# setenforce 0
[root@oem oracle]# getenforce
Permissive
[root@oem oracle]# getenforce
Permissive
Use WGET to send a HTTP request to check the status. If you receive response, then you will get a message like “HTTP request sent, awaiting response… 200 OK”
[root@oem oracle]# wget --no-check-certificate https://oem:7803/em
--2021-11-25 17:43:58-- https://oem:7803/em
Resolving oem (oem)... 192.168.56.222
Connecting to oem (oem)|192.168.56.222|:7803... connected.
WARNING: cannot verify oem's certificate, issued by ‘/O=EnterpriseManager on oem/OU=EnterpriseManager on oem/L=EnterpriseManager on oem/ST=CA/C=US/CN=oem’:
Self-signed certificate encountered.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: https://oem:7803/em/login.jsp [following]
--2021-11-25 17:43:58-- https://oem:7803/em/login.jsp
Reusing existing connection to oem:7803.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: https://oem:7803/em/faces/logon/core-uifwk-console-login [following]
--2021-11-25 17:43:58-- https://oem:7803/em/faces/logon/core-uifwk-console-login
Reusing existing connection to oem:7803.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: ‘em’
[ <=> ] 25,573 --.-K/s in 0s
2021-11-25 17:43:59 (115 MB/s) - ‘em’ saved [25573]
Check is firewall port is opened using telnet
[root@oem oracle]# telnet 192.168.56.222 7803
Trying 192.168.56.183...
Connected to 192.168.56.183.
Escape character is '^]'.