Hallo,
I have FC4 (64bit)/winxp. The internet connection 'disapperared' under fc4.
I have a D-Link ADSL Router (connection shared between 3 boxes).
I read other posts on this issue, I started to modify my network settings, however,
I haven't got much experience with linxu, let alone networking, so it hasn't helped.
At the moment, I have:

[marcin@localhost ~]$ /sbin/ifconfig
eth0 Link encap:Ethernet HWaddr 00:C0:9F:81B:92
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:40 errors:0 dropped:0 overruns:0 frame:0
TX packets:60 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:13032 (12.7 KiB) TX bytes:9415 (9.1 KiB)
Interrupt:185 Base address:0x1800

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2100 errors:0 dropped:0 overruns:0 frame:0
TX packets:2100 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2581982 (2.4 MB) TX bytes:2581982 (2.4 MiB)


[marcin@localhost ~]$ cat /etc/modprobe.conf
alias eth0 sis900
alias snd-card-0 snd-intel8x0
options snd-card-0 index=0
options snd-intel8x0 index=0
remove snd-intel8x0 { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-intel8x0
alias usb-controller ehci-hcd
alias usb-controller1 ohci-hcd
alias net-pf-10 off
alias ipv6 off

[marcin@localhost ~]$ /sbin/route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0
169.254.0.0 * 255.255.0.0 U 0 0 0 eth0
default localhost.local 0.0.0.0 UG 0 0 0 eth0


[marcin@localhost ~]$ cat /etc/resolv.conf
; generated by /sbin/dhclient-script
nameserver 192.168.1.5
search localdomain


in system setings>networking

Devices:
General:
-automatically obtain IP address settings with dhcp
-automatically obtain DNS information
Route:
destination network netmask gateway
192.168.1.5 255.255.0.0 192.168.1.1
IPsec:
empty
DNS:
Hostname: localhost.localdomain
Primary DNS: 192.168.1.5
DNS search path: localdomain
Hosts:
IP Name
192.168.1.1 localhost.localdomain


Can you help me configure it properly
192.168.1.5 is the address of the router

During the startup of the system I get the following message:

Determinig IP information for eth0 done [OK]
RTNETLINK answers: invalid argument

the error about rtnetlink appeared before the internet disappeared

Thanks for any help

"default localhost.local 0.0.0.0 UG 0 0 0 eth0" you have set yourself as your own default gateway?? that line would be "default 192.168.1.5 etc..." to use the router as the route to the internet

Thanks Chris, but how can I change it? (I'm don't know
much about networking)
Which IP should I write there?
192.168.1.1 is the IP which opens the router's settings website
yesterday it was 192.168.1.5 - I didn't know it changes

if the address on the router is changing, then it must presumably be getting DHCP from an alternative location than itself. a bog standard home adsl router will statically put itself on .1 and never change, and act as dhcp from the rest of the network. do you have something else running dhcp? part of the dhcp details that our router is giving out should be it's own ip address as the gateway. even if the routers address changes, when you renew the dhcp lease your gateway would also change to suit this. if your router is working ok, and you're using purely dhcp then restart the network service and youshould be fine.

I restarted the system and everything seems to be fine,
apart from the fact that on the bootup I still get the error:

Determinig IP information for eth0 done [OK]
RTNETLINK answers: invalid argument

Is it anything to worry about?
thank you