[ale] network problems

Scott Nolde scott at mediaone.net
Mon Jun 4 16:18:39 EDT 2001


Do you have icmp_echo_ignore_all turned on?
echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all

If it were just ignoring icmp, this may be it.

- Scott

On Mon, 4 Jun 2001, Ken Nagorski wrote:

> Hi there,
>
> 	OK. I have two redhat servers. we will call them one and two.on
> box one you can ping box two on box two you can't see box one... I can't
> figure it out. It's plugged into a Flowpoint 2200 router/DSL but we
> removed it from there and plugged just the two computers into a hub. We
> had the same problem
>
> 	It can't see anything wrong from the routing tables. A hub is not
> capable of dropping ICMP packets... I am not sure what is up? Below are
> the routing tables. Maybe someone can suggest somehting for me to take a
> look at.
>
> box one --------------------------------------------
> [root at ns /root]# route -n
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 64.81.221.0     0.0.0.0         255.255.255.224 U     0      0        0
> eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
> 0.0.0.0         64.81.221.1     0.0.0.0         UG    0      0        0
> eth0
> box two -------------------------------------------
> Destination     Gateway         Genmask         Flags Metric Ref    Use
> Iface
> 64.81.221.0     0.0.0.0         255.255.255.224 U     0      0        0
> eth0
> 127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
> 0.0.0.0         64.81.221.1     0.0.0.0         UG    0      0        0
> eth0
> -------------------------------------------------
>
> Thanks
> Ken
>
>

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