F10 connection problems

[Clodoaldo Pinto Neto]

I'm having connection problems. Firefox only works when
network.dns.disableIPv6 is set to true. Yum must try many mirrors
before it finds one that works:

Trying other mirror.
http://fedora.c3sl.ufpr.br/linux/updates/10/x86_64/repodata/repomd.xml:
[Errno 4] IOError: <urlopen error (-2, 'Name or service not known')>

Folding at Home which was working now can't connect to the internet.

This is Fedora 10. My configs:

# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=d2.localdomain

# cat /etc/networks
default 0.0.0.0
loopback 127.0.0.0
link-local 169.254.0.0

# cat /etc/sysconfig/network-scripts/ifcfg-eth0
# Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit
Ethernet controller
DEVICE=eth0
BOOTPROTO=none
DNS1=208.67.220.220
DNS2=208.67.222.222
DNS3=10.1.1.1
GATEWAY=10.1.1.1
HWADDR=00:21:97:00:79:21
IPADDR=10.1.1.110
NETMASK=255.0.0.0
ONBOOT=yes
TYPE=Ethernet
USERCTL=no
IPV6INIT=yes
NM_CONTROLLED=yes
PEERDNS=yes

Any ideas? If there is anything I can add please let me know.

Regards, Clodoaldo