How to disable ICMP "Destination Unreachable"

Hi !

I have Windows box and Linux Box. I have client on Windows and server on
Linux.
Linux Box has address: 192.168.222.22 and this address(192.168.222.22) is
default gateway address in Windows Box.

When I send packets to address 100.100.100.100 and of course my Linux box
tells, that Destination Unreachable.

I don't want my Linux box to send ICMP-message "Destination Unreachable".
How this can be done ?
How can I disable ICMP message "Destination Unreachable" ?

Konstantin Grudnev

Hi Konstantin

Use iptables.
there is a DROP rule.
It will drop all the packets.

search net for iptables syntax.


regards,
T.Shrinivasan.

/sbin/iptables -I INPUT -p icmp -j DROP

No I have embedded Linux, so I don't have space for iptables and such
things, I need to know how to do it in kernel or using socket options?

"shrini" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ups.com...
> Hi Konstantin
>
> Use iptables.
> there is a DROP rule.
> It will drop all the packets.
>
> search net for iptables syntax.
>
>
> regards,
> T.Shrinivasan.
>

Konstantin Grudnev wrote:
> Hi !
>
> I have Windows box and Linux Box. I have client on Windows and server on
> Linux.
> Linux Box has address: 192.168.222.22 and this address(192.168.222.22) is
> default gateway address in Windows Box.
>
> When I send packets to address 100.100.100.100 and of course my Linux box
> tells, that Destination Unreachable.
>
> I don't want my Linux box to send ICMP-message "Destination Unreachable".
> How this can be done ?
> How can I disable ICMP message "Destination Unreachable" ?


If your Linux box does not have any connection to the
Internet, take the default gateway off the Windows setup
or point it elsewhere. Now, you're lying to the Windows
thet the Net can be reached via the Linux box.

The default gateway must always be the address of the
next hop host toward the Net.

If there's no other connection to the Net, you'll get
the unreachables for such addresses that cannot be routed.

--

Tauno Voipio
tauno voipio (at) iki fi