I can't change the zabbix domain name

[mike.s]

Hi
I have zabbix server with domain name zabbix.blabla.com. now i want to change the domain name to zabbix.blabla.net. So I did the following things:

• chang the host name from Zabbix frontend (Configuration -> Hosts)
• change the server's hostname to zabbix.blabla.net
• in /etc/zabbix/web/zabbix.conf.php edit $ZBX_SERVER = zabbix.blabla.net
• in /etc/zabbix/zabbix_agentd.conf edit
  • Server = xxx.xxx.xxx.xxx(IP Valid),127.0.0.1,zabbix.blabla.net
  • ServerActive = xxx.xxx.xxx.xxx(IP Valid),127.0.0.1,zabbix.blabla.net
  • Hostname=zabbix.blabla.net

and finally, I restarted zabbix-agent, zabbix-server and httpd service, but the domain zabbix.blabla.net is not reachable!
Can anybody help me to solve this problem?