Questions on this setup - don't understand why this is what it is.

Setup

PC1: Linux RH9 - eth0 - 172.17.0.32 static
eth1 - 192.168.2.255 static

Laptop1 Linux RH9 - eth0 - dhcp from PC1, 192.168.2.20

Laptop2 Linux RH9 - eth0 - dhcp from PC1, 172.17.18.27

So I have PC1 and two switches, one for eth0, one for eth1.
The two laptops are separated by the switches.

I don't have IPtables, or forwarding turned on at PC1

Here is my arp on PC1
Address HWtype HWaddress Flags Mask
Iface
172.17.18.27 ether 00:0D:2E:E8:5B:5C C
eth0
192.168.2.20 ether 00:10:A4:8A:88:08 C
eth1

So my question is, why Laptop1 can ping Laptop2 and vice versa?
I cannot telnet into each other, which is correct since I didn't turn
on forwarding. But why pinging works?
Can I stop that from happening?
TIA

begin virus.scr.txt On Tue, 05 Jul 2005 12:02:24 -0700, digitalpro wrote:

> Setup
>
> PC1: Linux RH9 - eth0 - 172.17.0.32 static
> eth1 - 192.168.2.255 static
>
> Laptop1 Linux RH9 - eth0 - dhcp from PC1, 192.168.2.20
>
> Laptop2 Linux RH9 - eth0 - dhcp from PC1, 172.17.18.27
>
> So I have PC1 and two switches, one for eth0, one for eth1.
> The two laptops are separated by the switches.
>
> I don't have IPtables, or forwarding turned on at PC1
>
> Here is my arp on PC1
> Address HWtype HWaddress Flags Mask
> Iface
> 172.17.18.27 ether 00:0D:2E:E8:5B:5C C
> eth0
> 192.168.2.20 ether 00:10:A4:8A:88:08 C
> eth1
>
> So my question is, why Laptop1 can ping Laptop2 and vice versa?
> I cannot telnet into each other, which is correct since I didn't turn
> on forwarding. But why pinging works?
> Can I stop that from happening?
> TIA

icmp

Try using iptables.


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