Can't able to ping the server

ashishshukla · 01-22-2009, 06:52 AM

Hi Friends,
I m not able to ping the server.I deployed one patch and then reboot the system two times but after that i m not able to ping the server. Before reboot i was able to ping the server.
I execute the iptabl commands which are as follows but still not resolved the problem -

iptables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT

/etc/init.d/iptables save

service iptables restart

Please help me regarding this.

Thanks

rweaver · 01-22-2009, 09:00 AM

Quote:

Originally Posted by ashishshukla

Hi Friends,
I m not able to ping the server.I deployed one patch and then reboot the system two times but after that i m not able to ping the server. Before reboot i was able to ping the server.
I execute the iptabl commands which are as follows but still not resolved the problem -

iptables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT

/etc/init.d/iptables save

service iptables restart

Please help me regarding this.

Thanks

Show us the output of iptables -L and have you verified you have network connectivity from that machine?

ashishshukla · 01-22-2009, 09:17 AM

Thanks for reply..

The output of iptales -L is :-

=======================================================
Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination
==========================================================

Also the network connectivity is there as i m connecting this machine through putty.

bhupc · 01-22-2009, 11:01 AM

what error do you get when u ping? Are you sure that icmp req packets are not being dropped in the n/w? This happens because of the n/w policies and to safeguard against the icmp echo req attacks.

rweaver · 01-22-2009, 12:41 PM

Quote:

Originally Posted by ashishshukla

Thanks for reply..

The output of iptales -L is :-

<SNIP>

Also the network connectivity is there as i m connecting this machine through putty.

Is it behind a firewall or nat'd with a port redirected so you can connect?

ashishshukla · 01-22-2009, 11:20 PM

There is no natting involve and this is not behind the firewall either.
We started facing this issue after we uploaded a patch on it.

Output of the ping is : -

===================================================================
ping x.x.x.x
PING x.x.x.x(x.x.x.x) 56(84) bytes of data.

===================================================================

bhupc · 01-23-2009, 11:19 PM

what patch did u apply? This should help know more about the problem

ashishshukla · 01-26-2009, 03:00 AM

That patch is nothing but to upgrade the version of F5(load balancer).