> when it type: service shorewall restart
> shorewall never stop it, if i want to restart the machie typing
> the command "reboot", the linux box become freeze in "stopping
> shorewall" and not shutdown. I have to push the power button
> and again turn on the machine.
> This firewall handle very, very connections.
> I don´t know what to do.
This sounds like a hardware problem. (It's very clear it's not a Shorewall
problem.)
Some BUT NOT ALL hardware problems can be detected by a Linux kernel and make a
log entry that you can see with dmesg. Just because there's no log entry
doesn't necessarily mean there's no hardware problem.
You may need to get some help - pulling in an acquaintance that's familiar with
the insides of a computer may be worthwhile even if you have to pay them a
"consulting fee" (a case of premium beer? a gift certificate at your local
pizza parlor? - $50?).
Try to remember what might have changed right around the time the problems
started. If any hardware was added or replaced recently, concentrate on the
possibility that job wasn't done quite right. Look especially for incompletely
seated wire connectors and circuit board edge connectors.
If the problem isn't yet obvious, I have a couple other suggestions (in order)
for you:
1) Shut the computer off, power it off if it isn't already, and open the cover.
Take out all the RAM sticks (remember which way they go in), clean the contacts
by briefly rubbing from one end to the other with a _SOFT_ pencil eraser,
change the order (for example stick1->stick2 and stick2->stick1), and put them
back in. (The idea is to rub any invisible dirt and grime and corrosion off the
connector pads near the edge; you do NOT want to rub so hard you damage the
connector pads or the "wires" that connect to them or the protective coating
over most of the stick. Things that were "shiny" when you started should still
be "shiny". Using a _soft_ pencil eraser as a cleaning tool works pretty well;
just remember your goal is _not_ to actually "erase" the connector pads.) Then
put the cover back on, boot up the machine, and see if it works any better.
1b) If it still doesn't work, shut it down and do a more thorough cleaning and
reseating. One by one unplug each of the network connectors (in back, _out_side
the box) and plug it right back in. Take the cover off again. For every
connector on every ribbon cable, push it with your finger to be sure it's
completely seated (these connectors are sometimes fairly difficult to put back
in place, are often easy to accidentally reverse, and may only fit if the
cables are routed one exact way - so don't disconnect them by pulling if you
don't feel 100% comfortable with them). If there are thin cables to the disks,
unplug _one_end_at_a_time_ (one end will be a disk, the other will be a circuit
board) and plug it right back in. Push on every other connector you can see
(power, etc.?-) to make sure it's fully seated. Push on the top of each of the
printed circuit boards that stands up and connects out the back of the machine
(PCI cards?) to be sure it's fully
seated in its edge connector at the bottom (these edge connectors take a
non-trivial amount of force to seat, so you have to push fairly hard, not so
hard that you break the circuit board though); if they are already fully seated
as they ideally should be, nothing will happen - nothing will move at all. Use
a vacuum with a small diameter PLASTIC nozzle that will neither cause shorts
nor scratch anything nor break anything (and will fit in all the crevices) to
remove all the dust from inside the computer. Finally if there's a filter
screen over the fan (there might not be), remove it and wash all the dust off
with water in a sink, shake as much water off as you can, and put it back in.
Ideally if the computer is more than three years old take out the old fan and
replace it with a brand new one. Then put the cover back on, boot up the
machine, and see if it works any better.
2) Swap in a different computer. First see if you can remove the system disk
drive from the old computer and put it in the new computer so you still have
the old software. If that won't work, a second alternative is if the old
computer has a writable CD drive, you may be able to write an "image" of its
system disk with some bootable imaging software (Acronis, etc.) onto several
CDs, then boot the same image software on the new computer and read the image
onto a new disk. If that won't work either, use your "emergency backup" (you do
have one, right?-) If all else fails, you may need to reinstall all the
software from scratch.
(If the old computer is clearly hopeless and you've gotten as much off it as
you can and you can't find a replacement lying around and you can't get
somebody to spend the money for a new replacement, one possibility is to treat
it analogous to how you would deal with a cracked windshield in a car by
"fixing" it with a hammer [for a computer a couple sprays with a plain water
misting bottle when the computer is powered on can cause lots of invisible
shorts].)
thanks! -Chuck Kollars
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