FC6 network problem

I've just upgraded from FC3 to FC6. The upgrade seemed to go okay. It
boots without any problems and services are starting properly.

The only issue is it can't find the gateway or DNS. I can ping other
machines on the local subnet but nothing outside. I can't ping the box
from outside the subnet either.

ifconfig is showing the correct settings.
/etc/resolv.conf has the correct nameserver.

Any suggestions?

Cheers
David

David Bromage wrote:
> I've just upgraded from FC3 to FC6. The upgrade seemed to go okay. It
> boots without any problems and services are starting properly.
>
> The only issue is it can't find the gateway or DNS. I can ping other
> machines on the local subnet but nothing outside. I can't ping the box
> from outside the subnet either.
>
> ifconfig is showing the correct settings.
> /etc/resolv.conf has the correct nameserver.
>
> Any suggestions?
>
> Cheers
> David

Check selinux profiles, or try:
# chkconfig --level 2345 iptables off
# chkconfig --level 2345 ip6tables off
# /etc/init.d/iptables stop
# /etc/init.d/ip6tables stop

The later worked for me, as I experienced something similar because of
iptables.

Wayne wrote:
> David Bromage wrote:
>
>> I've just upgraded from FC3 to FC6. The upgrade seemed to go okay. It
>> boots without any problems and services are starting properly.
>>
>> The only issue is it can't find the gateway or DNS. I can ping other
>> machines on the local subnet but nothing outside. I can't ping the box
>> from outside the subnet either.
>>
>> ifconfig is showing the correct settings.
>> /etc/resolv.conf has the correct nameserver.
>>
>> Any suggestions?
>
> Check selinux profiles, or try:
> # chkconfig --level 2345 iptables off
> # chkconfig --level 2345 ip6tables off
> # /etc/init.d/iptables stop
> # /etc/init.d/ip6tables stop
>
> The later worked for me, as I experienced something similar because of
> iptables.

Still not working. Pinging the gateway still gives "Destination Host
Unreachable".

Cheers
David

On Thu, 25 Jan 2007 18:05:26 +1100, David Bromage wrote:
> I've just upgraded from FC3 to FC6. The upgrade seemed to go okay. It
> boots without any problems and services are starting properly.
>
> The only issue is it can't find the gateway or DNS. I can ping other
> machines on the local subnet but nothing outside. I can't ping the box
> from outside the subnet either.
>
> ifconfig is showing the correct settings.
> /etc/resolv.conf has the correct nameserver.

Then my SWAG is no gateway. If you like, dump your setting for
us to look over.


-------- standard debug network problem text/script follows: ------------
dump_net.txt version 2.2



Once you get your network running you may want to run xx one last time
and save the output file for disk crash/new installs

Might not hurt to save xx for one of a network debugging checklist step.


The following script dumps your hardware status, network settings and
config files used in network setup. We need them to troubleshoot your
problem.

If you are having to use windows to access Usenet:
Format a diskette on the windows system.


Copy the following xx.txt script into xx.txt using notepad.exe
then save xx.txt to the diskette.

Feel free to include the #**** start/end xx.txt script **** lines.

If using linux for usenet access, su - root, copy script text into xx
chmod +x xx
./xx

and include a.txt (if on linux) or dosa.txt (if on windows) in your reply.


NOTE: to become root, you need to do a
su - root
not su root


#******** start of xx.txt script ****************

_out_fn=a.txt

function cat_fn
{
_fn=$1
if [ -f $_fn ] ; then
echo ======== cat $_fn ========== >> $_out_fn
cat $_fn >> $_out_fn
fi
} # cat_fn

function grep_fn
{
_fn=$1
if [ -e $_fn ] ; then
echo "======== tail -18 $_fn ==========" >> $_out_fn
tail -18 $_fn >> $_out_fn
fi
} # grep_fn

#********************************
# check if commands are in $PATH
# and if not add their path to $PATH
#********************************

_path=""
type ifconfig > /dev/null 2>&1
if [ $? -ne 0 ] ; then
_path="${_path}/sbin:"
fi

type cat > /dev/null 2>&1
if [ $? -ne 0 ] ; then
_path="${_path}/bin:"
fi

type id > /dev/null 2>&1
if [ $? -ne 0 ] ; then
_path="${_path}/usr/bin:"
fi

if [ -n "$_path" ] ; then
PATH=${_path}$PATH
export PATH
fi

#********************************
# check if root and logged in correctly
#********************************

_uid=$(id --user)

if [ $_uid -ne 0 ] ; then
echo " "
echo "You need to be root to run $0"
echo "CLick up a terminal and do the following:"
echo " "
echo "su - root"
echo "$PWD/xx"
exit 1
fi

root_flg=1

if [ -n "$LOGNAME" ] ; then
if [ "$LOGNAME" != "root" ] ; then
root_flg=0
fi
fi

if [ -n "$USER" ] ; then
if [ "$USER" != "root" ] ; then
root_flg=0
fi
fi

if [ $root_flg -eq 0 ] ; then
echo " "
echo "Guessing you did a su root"
echo "instead of a su - root"
echo "please exit/logout of this session and do the following:"
echo " "
echo "su - root"
echo "$PWD/xx"
echo " "
exit 1
fi


#********************************
# main code starts here
#********************************


date > $_out_fn
chmod 666 $_out_fn

if [ -n "$_path" ] ; then
echo ======== echo $PATH ========== >> $_out_fn
echo $PATH >> $_out_fn 2>&1
fi

cat_fn /etc/product.id

echo ======== cat /etc/*release ========== >> $_out_fn
cat /etc/*release >> $_out_fn 2>&1

echo ======== uname -rvi ============= >> $_out_fn
uname -rvi >> $_out_fn

echo ======== cat /etc/*version ========== >> $_out_fn
cat /etc/*version >> $_out_fn 2>&1

echo ======== cat /proc/version ========== >> $_out_fn
cat /proc/*version >> $_out_fn 2>&1

type lsb_release > /dev/null 2>&1
if [ $? -eq 0 ] ; then
echo ======== lsb_release -a ========== >> $_out_fn
lsb_release -a >> $_out_fn 2>&1
fi

echo " " >> $_out_fn
echo msec security level is $SECURE_LEVEL >> $_out_fn

type chkconfig > /dev/null 2>&1
if [ $? -eq 0 ] ; then
echo ======== chkconfig --list ========== >> $_out_fn
for _serv in avahi named tmdns ; do
chkconfig --list | grep $_serv > /dev/null 2>&1
if [ $? -eq 0 ] ; then
echo "Double check if /$_serv/ that not running" >> $_out_fn
fi
done

chkconfig --list | grep n >> $_out_fn
chkconfig --list | tail -15 >> $_out_fn

else
echo ======== ls -o /etc/rc2.d ========== >> $_out_fn
for _serv in avahi named tmdns ; do
ls /etc/rc2.d/S* | grep $_serv > /dev/null 2>&1
if [ $? -eq 0 ] ; then
echo " /$_serv/ is running" >> $_out_fn
fi
done

ls -o /etc/rc2.d >> $_out_fn
fi

_fn=/etc/nsswitch.conf
if [ -e $_fn ] ; then
echo ======== grep hosts: $_fn ========== >> $_out_fn
grep hosts: $_fn >> $_out_fn
fi

cat_fn /etc/resolv.conf

echo ======== hostname ========== >> $_out_fn
hostname >> $_out_fn

cat_fn /etc/hostname
cat_fn /etc/HOSTNAME

ls /etc/mod*.conf > /dev/null 2>&1
if [ $? -eq 0 ] ; then
echo "======== grep eth /etc/mod*.conf ==========" >> $_out_fn
grep eth /etc/mod*.conf >> $_out_fn
fi

cat_fn /etc/dhclient-enter-hooks

cat_fn /etc/host.conf

echo ================ ifconfig -a =============== >> $_out_fn
ifconfig -a >> $_out_fn

echo ============== route -n ================= >> $_out_fn
route -n >> $_out_fn

cat_fn /etc/sysconfig/network/routes

cat_fn /etc/sysconfig/network

echo ============== head -15 /etc/hosts =============== >> $_out_fn
head -15 /etc/hosts >> $_out_fn

cat_fn /etc/network/interfaces
cat_fn /var/run/network/ifstate


_cmd=""
type ethtool > /dev/null 2>&1
if [ $? -eq 0 ] ; then
_cmd="ethtool"
fi

type mii-tool > /dev/null 2>&1
if [ $? -eq 0 ] ; then
_cmd="mii-tool -v"
fi

if [ -z "$_cmd" ] ; then
echo ======== mii-tool/ethtool NOT INSTALLED ========== >> $_out_fn
fi

for nic in 0 1 2 ; do

if [ -n "$_cmd" ] ; then
$_cmd eth$nic > /dev/null 2>&1
if [ $? -eq 0 ] ; then
echo ======== $_cmd eth$nic ========== >> $_out_fn
$_cmd eth$nic >> $_out_fn
fi
fi

cat_fn /etc/sysconfig/network-scripts/ifcfg-eth$nic

ifconfig eth$nic > /dev/null 2>&1
if [ $? -eq 0 ] ; then
set $(ifconfig eth$nic | tr [A-Z] [a-z])
cat_fn /etc/sysconfig/network/ifcfg-eth-id-$5
fi

grep_fn /var/lib/dhcp/dhclient-eth${nic}.leases
grep_fn /etc/dhcpc/dhcpcd-eth${nic}.info

done


cat_fn /etc/hosts.allow
cat_fn /etc/hosts.deny
echo "======= end of config/network data dump ===========" >> $_out_fn

_dos_fn=$PWD/dos${_out_fn}
awk '{print $0 "\r" }' $PWD/$_out_fn > $_dos_fn
chmod 666 $_dos_fn


echo " "
echo "If posting via linux, post contents of $PWD/$_out_fn"
echo "You might want to copy it to your account with the command"
echo "cp $PWD/$_out_fn ~your_login"
echo " "
echo "If posting via windows, post contents of $PWD/$_dos_fn"
echo " "
echo "If using diskette,"
echo "Copy $_dos_fn to diskette with the following commands:"
echo " "
echo "mkdir -p /floppy"
echo "mount -t auto /dev/fd0 /floppy"
echo "cp $_dos_fn /floppy"
echo "umount /floppy "
echo " "
echo "and $_dos_fn is ready for windows from diskette"
echo " "

#*********** end of dump xx.txt script *********


and then copy xx.txt to the diskette.

On some linux distributions, you may need to get into the User/Group
screen, show all users, double click root, create the password, and
enable root. Root's password should never be the same as anyone elses.

To move xx.txt from diskette to the linux box, click up a linux terminal
su - root
(root's passwd)

mkdir -p /floppy
mount -t auto /dev/fd0 /floppy
tr -d '\015' < /floppy/xx.txt > xx
chmod +x xx
../xx

Back on the windows OS, you can cut/paste the a:\dosa.txt into your reply
under windows.
Do not attach it.

If you are dual booting the box, you can copy xx.txt to linux from windows.
Note: The following assumes /dev/hda1 is where windows is installed on the
first partition on the C: drive

mkdir -p /doze
mount -t auto /dev/hda1 /doze
tr -d '\015' < "/doze/whever/you saved/xx.txt" > xx
umount /doze

On windows you can read dosa.txt from a linux partition if you installed
windows linux driver from
http://uranus.it.swin.edu.au/~jn/linux/explore2fs.htm

"David Bromage" <(E-Mail Removed)> wrote in message
news:45b856b6$(E-Mail Removed)...
> I've just upgraded from FC3 to FC6. The upgrade seemed to go okay. It
> boots without any problems and services are starting properly.
>
> The only issue is it can't find the gateway or DNS. I can ping other
> machines on the local subnet but nothing outside. I can't ping the box
> from outside the subnet either.
>
> ifconfig is showing the correct settings.
> /etc/resolv.conf has the correct nameserver.
>

Did you do a clean install or a upgrade install of FC6 ?

Check /etc/hosts file for the 127.0.0.1 loopback and the gateway address and
the machine's address.

Check /etc/sysconfig/network for your host name.

Also you can use the Gui network configuration ( administration -->
network -> device tab) and check for the default gateway address on Eth0 and
the primary DNS on the DNS Tab.
( or you could run system-config-network in a console )


--
------------------------------------------------------------------------------------------------------------------
True Multitasking is having three computers and a chair with wheels.


Sandgroper
------------------------------------
Remove KNICKERS to Email
(E-Mail Removed)

David Bromage <(E-Mail Removed)> wrote:
> Wayne wrote:
>> David Bromage wrote:
>>
>>> I've just upgraded from FC3 to FC6. The upgrade seemed to go okay. It
>>> boots without any problems and services are starting properly.
>>>
>>> The only issue is it can't find the gateway or DNS. I can ping other
>>> machines on the local subnet but nothing outside. I can't ping the box
>>> from outside the subnet either.
>>>
>>> ifconfig is showing the correct settings.
>>> /etc/resolv.conf has the correct nameserver.
>>>
>>> Any suggestions?

....

> Still not working. Pinging the gateway still gives "Destination Host
> Unreachable".

Make sure the gateway IP address is correct.

--
Clifford Kite

Sandgroper wrote:
> Did you do a clean install or a upgrade install of FC6 ?

Upgrade install.

> Check /etc/hosts file for the 127.0.0.1 loopback and the gateway address and
> the machine's address.
>
> Check /etc/sysconfig/network for your host name.

Both are correct.

> Also you can use the Gui network configuration ( administration -->
> network -> device tab) and check for the default gateway address on Eth0 and
> the primary DNS on the DNS Tab.
> ( or you could run system-config-network in a console )

All the settings are correct.

Still can't ping the gateway or anything else outside the subnet.

Cheers
David

In aus.computers.linux on Fri, 26 Jan 2007 13:47:13 +1100
David Bromage <(E-Mail Removed)> wrote:
> All the settings are correct.
>
> Still can't ping the gateway or anything else outside the subnet.

Check that the routing is what you think it is.

netstat -rn and make sure that the only default route is the one you
expect.

Zebee

Zebee Johnstone wrote:
> In aus.computers.linux on Fri, 26 Jan 2007 13:47:13 +1100
> David Bromage <(E-Mail Removed)> wrote:
>
>>All the settings are correct.
>>
>>Still can't ping the gateway or anything else outside the subnet.
>
> Check that the routing is what you think it is.
>
> netstat -rn and make sure that the only default route is the one you
> expect.

Everything is correct but I still can't ping anything outside the subnet.

Cheers
David

David Bromage <(E-Mail Removed)> writes:

> Everything is correct but I still can't ping anything outside the subnet.

1) as another poster told you, check the gateway address
2) is the name server setup correct? if you use a numeric address,
can you ping outside the subnet?

--
Maurizio Loreti ROT13:(E-Mail Removed) | (@_
Un. of Padova, Dept. of Physics, Padova, Italy | //\
http://www.pd.infn.it/~loreti/mlo.html | V_/_