Re: Destination Host Unreachable
- From: Bit Twister <BitTwister@xxxxxxxxxxxxxxxx>
- Date: Sun, 2 Dec 2007 22:33:41 +0000 (UTC)
On Sun, 2 Dec 2007 14:12:08 -0800 (PST), Phi wrote:
I have a computer on a local network (192.168.1.0) that dual boots Win
XP and FC8. When I boot XP, I have full network functionality and
internet access. I am making this post from that boot.
When I boot FC8, I have no network or internet access. I can not even
reach the gateway router.
ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:1A:92:6B:ED:4B
inet addr:192.168.1.118 Bcast:192.168.1.255 Mask:
255.255.255.0
inet6 addr: fe80::21a:92ff:fe6b:ed4b/64 Scope:Link
UP BROADCAST RUNNING 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
But not packets RX/TX
cat hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 XENON localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
192.168.1.1
I would put at least a name there
192.168.1.1 gateway
-------- standard debug network problem text/script follows: ------------
dump_net.txt version 4.1
If you read http://www.catb.org/~esr/faqs/smart-questions.html
it will suggest you provide any information about your setup which might
help troubleshoot your problem. Example, Internet connection type,
(cable, adsl,,,), it's hardware, (vendor/model of the modem).
Maybe that your system is hooked to a hub/switch/router and type of
hookup, (Ethernet,usb, wireless,...), distribution, config file values,... .
We need to know about your network hardware and see your config settings.
Something does not start up, try
dmesg
and/or look through /var/log/messages for an error message.
If your problem is slow network give a URL so we can try it.
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 steps.
The following ambidextrous script is for suse, mandriva, ubuntu, kubuntu
and will dump your hardware status, network settings and config files used
in network setup. We need that information 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/cd/usb stick.
To get the script results back to Windows and
none of the above hardware works, you can use http://www.fs-driver.org/
If you do not want some malware writing to linux. You can replace it
with http://www.diskinternals.com/linux-reader/ which does not
provide write access to linux.
The above assumes you have not created a FAT partition to exchange
files between OSs. If you did, copy dosa.txt to it from linux and read
it from windows.
I do recommend remove/installing the windows/linux file system
driver after you get the linux network up.
Makes your Windows Anti Virus scanner run much faster after removal.
Also, if logged into windows, it would be nice to include your windows
network settings. Click up a Prompt/cmd/terminal and add in contents from
ipconfig /all
when you reply with linux settings.
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
For the suse, ubuntu, kubuntu users,
sudo -i
chmod +x xx
../xx
exit will exit the sudo -i command.
If xx is not in your home directory, you will have to provide the full
path in place of $HOME. Example:
sudo -i
chmod +x /some/where/xx
/some/where/xx
------------------ Script starts below this line ---------
#!/bin/bash
#*************************************************************
#*
#* xx - Dump network config files and network hardware status
#*
#* Output: a.txt linux file
#* dosa.txt Windows file
#*
#*************************************************************
_fn=a.txt
_out_fn=$PWD/$_fn
_dos_fn=$PWD/dos${_fn}
_home=$PWD
function cat_fn
{
_fn=$1
if [ -f $_fn ] ; then
_count=$(stat -c %s $_fn )
if [ $_count -gt 0 ] ; then
echo "======== cat $_fn ==========" >> $_out_fn
cat $_fn >> $_out_fn
fi
fi
} # end cat_fn
function grep_fn
{
_fn=$1
if [ -e $_fn ] ; then
_count=$(stat -c %s $_fn )
if [ $_count -gt 0 ] ; then
_count=$(grep -v '^#' $_fn | wc -l)
if [ $_count -gt 0 ] ; then
echo "======== grep -v '^#' $_fn ==========" >> $_out_fn
if [ "$_fn" != "shorewall.conf" ] ; then
grep -v '^#' $_fn >> $_out_fn
else
awk 'empty{if (!/^#/) print; empty=0} /^$/{empty=1}' $_fn >> $_out_fn
fi
fi
fi
fi
} # end grep_fn
function ls_dir
{
_dr=$1
if [ -d $_dr ] ; then
echo "========= cd $_dr ; ls -al ========" >> $_out_fn
cd $_dr
ls -al >> $_out_fn
fi
} # end ls_dir
function tail_fn
{
_fn=$1
if [ -e $_fn ] ; then
echo "======== tail -18 $_fn ==========" >> $_out_fn
tail -18 $_fn >> $_out_fn
fi
} # end tail_fn
#********************************
# check if commands are in $PATH
# and if not add them 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"
echo " "
echo "or "
echo " "
echo "sudo -i"
echo "$PWD/xx"
echo " "
exit 1
fi
root_flg=1
if [ -n "$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 " "
echo "or "
echo " "
echo "sudo -i"
echo "$PWD/xx"
echo " "
exit 1
fi
#********************************
# main code starts here
#********************************
echo "Working, output will be in $_out_fn "
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
for _d in /etc/*release ; do
if [ ! -d $_d ] ; then
echo "======== cat $_d ==========" >> $_out_fn
cat $_d >> $_out_fn
fi
done
echo "======== uname -rvi =============" >> $_out_fn
uname -rvi >> $_out_fn
for _d in /etc/*version ; do
if [ ! -d $_d ] ; then
echo "======== cat $_d ==========" >> $_out_fn
cat $_d >> $_out_fn
fi
done
cat_fn /proc/*version
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 " " >> $_out_fn
if [ -n "$SECURE_LEVEL" ] ; then
echo "msec security level is $SECURE_LEVEL" >> $_out_fn
fi
echo "
$(grep 'model name' /proc/cpuinfo)
$(grep 'cpu MHz' /proc/cpuinfo)
" >> $_out_fn
echo "======== free ==========" >> $_out_fn
free >> $_out_fn 2>&1
echo " " >> $_out_fn
if [ -e /etc/inittab ] ; then
_line=$(grep :initdefault /etc/inittab)
set -- $(IFS=':'; echo $_line)
echo " " >> $_out_fn
echo "Default run level is $2" >> $_out_fn
echo " " >> $_out_fn
fi
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 -i $_serv > /dev/null 2>&1
if [ $? -eq 0 ] ; then
echo "Double check if /$_serv/ needs to be disabled on boot" >> $_out_fn
chkconfig --list | grep -i $_serv >> $_out_fn
fi
done
chkconfig --list >> $_out_fn
else
echo "======== ls -o /etc/rcS.d/ ==========" >> $_out_fn
for _serv in avahi named tmdns ; do
ls /etc/rcS.d/S* | grep $_serv > /dev/null 2>&1
if [ $? -eq 0 ] ; then
echo "Double check if /$_serv/ needs to be disabled on boot" >> $_out_fn
fi
done
ls -o /etc/rcS.d >> $_out_fn
fi
_fn=/etc/nsswitch.conf
if [ -e $_fn ] ; then
echo "======== grep hosts: $_fn ==========" >> $_out_fn
grep hosts: $_fn >> $_out_fn
fi
grep_fn /etc/resolv.conf
grep_fn /etc/resolvconf/resolv.conf.d/head
cat_fn /etc/resolvconf/resolv.conf.d/base
cat_fn /etc/resolvconf/resolv.conf.d/tail
echo "======== hostname --fqdn ==========" >> $_out_fn
hostname --fqdn >> $_out_fn
cat_fn /etc/netprofile/profiles/default/files/etc/hosts
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/dhclient-exit-hooks
grep_fn /etc/host.conf
echo "================ ifconfig -a ==============" >> $_out_fn
ifconfig -a >> $_out_fn
cat_fn /etc/iftab
cat_fn /etc/udev/rules.d/61-net_config.rules
echo "============== route -n =================" >> $_out_fn
route -n >> $_out_fn
cat_fn /etc/sysconfig/network/routes
cat_fn /etc/sysconfig/network
grep_fn /etc/mkinitramfs/initramfs.conf
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 >> $_out_fn
fi
fi
echo "=== dmesg | grep eth$nic | grep -v SRC= ===" >> $_out_fn
dmesg | grep eth$nic | grep -v SRC= >> $_out_fn
echo "=== grep eth$nic /var/log/messages | tail -10 ===" >> $_out_fn
grep eth$nic /var/log/messages | tail -10 >> $_out_fn
cat_fn /etc/sysconfig/network-scripts/ifcfg-eth$nic
cat_fn /etc/sysconfig/networking/devices/ifcfg-eth$nic
cat_fn /etc/sysconfig/networking/profiles/default/ifcfg-eth$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-$5
fi
tail_fn /var/lib/dhcp/dhclient-eth${nic}.leases
tail_fn /var/lib/dhclient/dhclient-eth${nic}.leases
tail_fn /etc/dhcpc/dhcpcd-eth${nic}.info
done # end for nic in 0 1 2 ; do
_dir=/etc/NetworkManager/dispatcher.d
if [ -d $_dir ] ; then
ls_dir $_dir
for _d in "if-up.d" "if-down.d" "if-pre-up.d" "if-post-down.d" ; do
if [ -e /etc/network/${_d} ] ; then
echo "==== cd /etc/network/${_d} ; ls -al ===" >> $_out_fn
cd /etc/network/${_d}
ls -al >> $_out_fn
fi
done
fi
if [ -d /etc/sysconfig/network-scripts ] ; then
for _d in "ifdown.d" "ifup.d" ; do
if [ -e /etc/sysconfig/network-scripts/${_d} ] ; then
_cmd="cd /etc/sysconfig/network-scripts/${_d} ; ls -al "
echo "===== $_cmd ====" >> $_out_fn
cd /etc/sysconfig/network-scripts/${_d}
ls -al >> $_out_fn
fi
done
fi
ls_dir /etc/dhcp3/dhclient-exit-hooks.d
ls_dir /etc/resolvconf/update.d
if [ -d /etc/shorewall ] ; then
_count=$(chkconfig --list shorewall | grep -c :on )
if [ $_count -gt 0 ] ; then
echo "======= Shorewall settings =========" >> $_out_fn
cd /etc/shorewall
for _f in $(ls) ; do
echo "======= $_f =========" >> $_out_fn
grep_fn $_f
done
fi
fi
cd $_home
grep_fn /etc/hosts.allow
grep_fn /etc/hosts.deny
echo "==== end of config/network data dump =======" >> $_out_fn
awk '{print $0 "\r" }' $_out_fn > $_dos_fn
chmod 666 $_dos_fn
echo " "
echo "If posting via linux, post contents of $_out_fn"
echo "You might want to copy it to your account with the command"
echo "cp $_out_fn ~your_login"
echo " "
echo "If posting via windows, post contents of $_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 *********
----------- script ends above this line ------------------------
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 else's.
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.
When you do reply, please remove/trim my response/text/script from your reply
before you add in the results/output of the script.
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
If you have sata drive, you may have to use /dev/sda1 instead of /dev/hda1.
cat /etc/fstab to see which value will be required.
Do keep quotes used in the following:
mkdir -p /doze
mount -t auto /dev/hda1 /doze
tr -d '\015' < "/doze/wherever/you_saved/xx.txt" > xx
umount /doze
On windows you can read dosa.txt from a linux partition if you installed
windows linux file system driver from
http://uranus.it.swin.edu.au/~jn/linux/explore2fs.htm
Remember to remove/uninstall it to allow your Windows Anti Virus
scanner to run faster.
.
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