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Old 07-12-2010, 10:07 AM   #1
Registered: Jan 2007
Posts: 49

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unable to ping the linux machine

i have two linux machines(machine1(rhel client) and machine2(rhel server))
i am able to login the machine2 from machine1
but i am unable to ping machine1 from machine2
fire wall is stoped in both machine
could you please help me on this
Old 07-12-2010, 11:09 AM   #2
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Registered: Jun 2008
Location: Eelam
Distribution: Redhat, Solaris, Suse
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may be the ICMP request disabled
Refer this
Old 07-12-2010, 11:43 AM   #3
Registered: Jan 2007
Posts: 49

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thanks for your replay

still i am unable to ping
after adding the below line to /etc/sysctl.conf file:
net.ipv4.icmp_echo_ignore_all = 1
Old 07-12-2010, 11:10 PM   #4
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Registered: Mar 2010
Location: Shanghai,China
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ping hostname or ping IP_addr?
Old 07-15-2010, 02:29 AM   #5
Registered: Nov 2006
Distribution: Fedora 7 & 9, Ubuntu
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hi chakribobby...

you misunderstood.. from the link

To enable ping request type the command:
echo "0" > /proc/sys/net/ipv4/icmp_echo_ignore_all
Old 07-15-2010, 02:40 AM   #6
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Registered: Jul 2010
Distribution: Ubuntu 10.4, Fedora 13
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Use iptables to Allow ping request

maybe your linux firewal is blocking the request.

Iptables -A INPUT -p icmp -j ACCEPT
Old 07-15-2010, 06:17 PM   #7
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What do you hope to gain from ping?


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