Internet Access problem on Fedora Core 4.

I m new to the linux/unix world. I m facing a problem while i try to
access internet on Fedora Core 4, kernel build 2.6.11.

I m using an ethernet LAN card to access the internet. I m behind a
proxy. I m using 3com Etherlink XL 10/100 card. As i enter a url ( any
url) in firefox web browser in kde, i get an error message to the
effect of " cannot find the address, please check the address." I saw
the same problem being reffered to on another forum, somebody suggested
that the system in this case is not able to see the internet. I did not
understand what they suggested there, perhaps that suffices to say that
i m new to this unix/linux world.

I did manage to activate my LAN card. How ever the browser doest open
any page to view. The same LAN card works fine on XP as i have a dual
boot system. Is it something to do with the connection settings,
loopback interface, browser settings, the proxy that my isp is using to
allow security or is it something more complicated.

Please suggest a solution, im struggling to resolve the issue. Its not
a good feeling at all.

Regards
j,aldin

First thing you should probably do is get away from using kde to find
out what's going on and use the command line, you'll learn to love it
and you'll need to be there to change the connection and card settings.
Ctrl-Alt-F1 will get you there from kde

once you're there, log in and try to ping an address. try

# ping google.com

and see what response you get.

If that doesn't work, try to ping a numeric address

# ping 66.152.98.206

If that works, then you have a DNS resolver problem. If it doesn't you
need to investigate your lan card settings. try

# ifconfig eth0

and see what comes up. You will probably find it useful to note down
the ip addresses from your XP settings to have smeothing to refer to.
The important things here are that your lan card is being allocated an
address (or has been set a static address) and knows where to go to
answer DNS queries and how to get out to the internet. In your case you
will also need to know the proxy settings, whcih will take the form of
a numeric address and possibly a port number as well.

of course, it may just be that you haven't entered the proxy settings
in Firefox, but you did check that first, didn't you?

good luck

PS. If you're not comfortable with the command line yet, you may want
to check out webmin (www.webmin.com) which has a very handy browser
interface for setting up all those complicated config files. Not for
the purists but can be invaluable for beginners.

Yuni;

Thanks a lot for responding. Much appriciated mate.

Ok, Firstly i tried to access google through the raw ipaddress.
Actually it did not help, there was an error message. Hence that
failed. I at that point thought that there is a problem with the os not
being able to see the DNS. I did not check if the email is working or
not. I assumed it wont.

As per the your second option i checked my etc/resolv.conf file. This
was done to see if my DNS was misconfigured. The only entry i found
there was:

search localdomain

I tried putting the proxy address as a value to nameserver, assuming
that it would be working as my DNS caching server. I then tried to
access google.com from firefox. It did not help either, so i assume
that my proxy is just a web proxy and not a DNS server.

I then checked if my browser proxy configuration was set to direct
connection to internet, it actually was set to that. So i went ahead
and changed it to setting proxy manually, and entered my proxy address,
i was not sure of the port so i enetered 80. I tried to access
goole.com again. It falied once again.

I checked to see if my ethernet card was really up and running. Here is
what i found. ( I d used eth1 becasue i have two LAN interfaces and
this is the one i m using on XP and fedora core 4.)

[root@localhost ~]# ifconfig eth1
eth1 Link encap:Ethernet HWaddr 00:B00:81:4F:64
inet addr:192.168.0.66 Bcast:192.168.0.255
Mask:255.255.255.0
inet6 addr: fe80::2b0:d0ff:fe81:4f64/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:5 Base address:0xe880

( *** Concern 1- Values of RX packets and TX packets is zero, is that
normal)

I then tried pinging 64.233.179.99 ( google.com)

[root@localhost ~]# ping 64.233.179.99
PING 64.233.179.99 (64.233.179.99) 56(84) bytes of data.
>From 192.168.0.66 icmp_seq=0 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=1 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=2 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=4 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=5 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=6 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=8 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=9 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=10 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=12 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=13 Destination Host Unreachable
>From 192.168.0.66 icmp_seq=14 Destination Host Unreachable

--- 64.233.179.99 ping statistics ---
15 packets transmitted, 0 received, +12 errors, 100% packet loss, time
14000ms
, pipe 4

( *** Concern - 2 Host was not reachable, why if i may ask)

I then tried to ping my loopback ip (lo) by using:

[root@localhost ~]# ping 127.0.0.1
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.151 ms
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.122 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.112 ms
64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.122 ms
64 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=0.122 ms
64 bytes from 127.0.0.1: icmp_seq=5 ttl=64 time=0.107 ms
64 bytes from 127.0.0.1: icmp_seq=6 ttl=64 time=0.118 ms
64 bytes from 127.0.0.1: icmp_seq=7 ttl=64 time=0.109 ms
64 bytes from 127.0.0.1: icmp_seq=8 ttl=64 time=0.117 ms
64 bytes from 127.0.0.1: icmp_seq=9 ttl=64 time=0.114 ms
64 bytes from 127.0.0.1: icmp_seq=10 ttl=64 time=0.133 ms
64 bytes from 127.0.0.1: icmp_seq=11 ttl=64 time=0.133 ms
64 bytes from 127.0.0.1: icmp_seq=12 ttl=64 time=0.116 ms
64 bytes from 127.0.0.1: icmp_seq=13 ttl=64 time=0.108 ms
64 bytes from 127.0.0.1: icmp_seq=14 ttl=64 time=0.117 ms
64 bytes from 127.0.0.1: icmp_seq=15 ttl=64 time=0.140 ms
64 bytes from 127.0.0.1: icmp_seq=16 ttl=64 time=0.138 ms
64 bytes from 127.0.0.1: icmp_seq=17 ttl=64 time=0.140 ms
64 bytes from 127.0.0.1: icmp_seq=18 ttl=64 time=0.108 ms

--- 127.0.0.1 ping statistics ---
19 packets transmitted, 19 received, 0% packet loss, time 17997ms
rtt min/avg/max/mdev = 0.107/0.122/0.151/0.016 ms, pipe 2
You have mail in /var/spool/mail/root

[root@localhost ~]#

( *** Concern - 3, as you could see that pinging the loopback interface
did work. Is that a normal occurance, if it is then why it failed to
reach 64.233.179.99 (google.com)

Now since i can not reach out to 64.233.179.99, i m assuming that
there is absolutely nothing working. I m assuming there is a problem
with my ethenet interface configuration. There may also be an ill
configured routing table, it can be checked with netstat -rn, but i
dont know what to see there and how to correct it if it is incorrect.

There can also be a possibility that device configuration with ifconfig
is not functioning properly( RX and TX values being 0 gives that clue).
Please suggest if my ip, broadcast and subnet mask addresses are
defined properly. Also please shed some light on my concerns stated
above.

As far as name resolution is concerned i guess i should put proper info
in resolv.conf file and/or change the rote to the name server. How can
i do that? I guess i d need your help there.

Please help!!!

Thnak you and Kind Regards.
j,aldin

if you were able to convert google.com to a numeric address, that
suggests you are ok with dns.

what exactly is your lan card connected to? where does it get its ip
address from?

If it gets the address dynamically (dhcp) from another computer or
modem, you need to check that the settings on that device are correct.

If it has been assigned a static address, you need to check that the
configuration is correct and contains the correct addresses for the
router gateway.

You'll find the files which control the boot configuration of
interfaces in /etc/sysconfig/network-scripts and the file you'll want
to look at is ifcfg-eth1

you'll find these two pages useful:

http://tldp.org/HOWTO/Firewall-HOWTO-6.html#ss6.2
http://tldp.org/HOWTO/Networking-Overview-HOWTO.html

good luck

it is normal for you to be able to ping localhost

resolv.conf is nornmally updated automatically when the connection is
established.

if you have a firewall in place I suggest you disable it first to
establish a connection.

hi

can tell me how do i link a machine running linux Ubuntu on my network using
a 4port broadband router how to setup network to share resources on my
network (3 machines are running win xp prof one is linux and i also need to
know how to create a dialup on
the linux machine please help

success



<(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
> if you were able to convert google.com to a numeric address, that
> suggests you are ok with dns.
>
> what exactly is your lan card connected to? where does it get its ip
> address from?
>
> If it gets the address dynamically (dhcp) from another computer or
> modem, you need to check that the settings on that device are correct.
>
> If it has been assigned a static address, you need to check that the
> configuration is correct and contains the correct addresses for the
> router gateway.
>
> You'll find the files which control the boot configuration of
> interfaces in /etc/sysconfig/network-scripts and the file you'll want
> to look at is ifcfg-eth1
>
> you'll find these two pages useful:
>
> http://tldp.org/HOWTO/Firewall-HOWTO-6.html#ss6.2
> http://tldp.org/HOWTO/Networking-Overview-HOWTO.html
>
> good luck
>
> it is normal for you to be able to ping localhost
>
> resolv.conf is nornmally updated automatically when the connection is
> established.
>
> if you have a firewall in place I suggest you disable it first to
> establish a connection.
>