Network Manager or another connection issue?

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http://forums.fedoraforum.org – After trying to do a F12 RC1 netinstall yesterday, and getting the message 'unable to read group information from repositories' I re-installed the beta livecd then installed all updates. I knew some of the updates would include Network Manager, so I thought with a mostly clean install that my previous connection issues would be solved. I was wrong. Why is it that yum will connect (I used a terminal ctrl-alt F4) to get updates, etc. but Firefox and my weather icon on the panel won't, until I add IP's to the /etc/hosts.allow file? First I added my localhost IP and the Opendns IP to the /etc/hosts file, still no connection after a reboot. Then I added those IP's to the hosts.allow file, and still no connection until I did 'service network restart'. Then my weather icon connects and Firefox will connect (without having to disable IPv6 this time.) Some forum responses to network issues will suggest disabling Network Manager, but then why have it at all? When I did the network restart, I got this message: Code: [root@localhost ~]# service network restart Shutting down interface eth0:                              [  OK  ] Shutting down loopback interface:                          [  OK  ] Bringing up loopback interface:                            [  OK  ] Bringing up interface eth0:  Determining IP information for eth0.../etc/sysconfig/network-scripts/ifup-eth: line 298:  2275 Terminated              /sbin/dhclient ${DHCLIENTARGS} ${DEVICE}  failed. It says it failed, but I'm now connected, so really it didn't fail ? I thought I'd add something to bugzilla, but when I searched on the DHCLIENTARGS all I got was a few reports that were closed. When I did a search for F12 Network manager, i got a bunch of open and new reports, so I don't know where it would fit... If it would help, I can post the output of lspci or something, but I did post a lot of output to a previous thread when I first installed the beta. Bringing up an eth0 connection shouldn't require all this fussing with different files to make it work, imho. (HowTos)