Ping - Revision history

Franks at 23:22, 16 February 2006

2006-02-16T23:22:06Z

← Older revision		Revision as of 16:22, 16 February 2006
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	ping is a tool written by the late Mike Muus to measure latency and round-trip time between two hosts connected by a network. Often it is also used to simply debug if the other host is up. It works by sending an [[ICMP]] type 8 packet to the remote host which replies with an [[ICMP]] type 0 packet. Sometimes there is a [[firewall]] preventing a ping from receiving a reply.		ping is a tool written by the late Mike Muus to measure latency and round-trip time between two hosts connected by a network. Often it is also used to simply debug if the other host is up. It works by sending an [[ICMP]] type 8 (request) packet to the remote host which replies with an [[ICMP]] type 0 (reply) packet. Sometimes there is a [[firewall]] preventing a ping from receiving a reply.

	This would look like so:		This would look like so:

Franks at 23:17, 16 February 2006

2006-02-16T23:17:38Z

← Older revision		Revision as of 16:17, 16 February 2006
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	If you're using a packet [[sniffer]] you should see both the request and the reply if things are working unmolested.		If you're using a packet [[sniffer]] you should see both the request and the reply if things are working unmolested.
			# tcpdump -i [[Variables\|rl0]] host gateway.home.lan
	18:13:30.601477 IP laptop.home.lan > gateway.home.lan: ICMP echo request, id 36372, seq 2, length 64		18:13:30.601477 IP laptop.home.lan > gateway.home.lan: ICMP echo request, id 36372, seq 2, length 64
	18:13:30.601773 IP gateway.home.lan > laptop.home.lan: ICMP echo reply, id 36372, seq 2, length 64		18:13:30.601773 IP gateway.home.lan > laptop.home.lan: ICMP echo reply, id 36372, seq 2, length 64

Franks at 23:16, 16 February 2006

2006-02-16T23:16:33Z

← Older revision		Revision as of 16:16, 16 February 2006
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	--- mail.yashy.com ping statistics ---		--- mail.yashy.com ping statistics ---
	1 packets transmitted, 0 packets received, 100.0% packet loss		1 packets transmitted, 0 packets received, 100.0% packet loss

			If you're using a packet [[sniffer]] you should see both the request and the reply if things are working unmolested.
			18:13:30.601477 IP laptop.home.lan > gateway.home.lan: ICMP echo request, id 36372, seq 2, length 64
			18:13:30.601773 IP gateway.home.lan > laptop.home.lan: ICMP echo reply, id 36372, seq 2, length 64

	One of the original [[DoS]] was a simple ping flood. If you have more bandwidth then your victim, you can do		One of the original [[DoS]] was a simple ping flood. If you have more bandwidth then your victim, you can do

Frankk at 06:29, 27 October 2005

2005-10-27T06:29:12Z

← Older revision		Revision as of 23:29, 26 October 2005
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	ping is a tool written by the late Mike Muus to measure latency and round-trip time between two hosts connected by a network. Often it is also used to simply debug if the other host is up. It works by sending an [[ICMP]] type 8 packet to the remote host which replies with an [[ICMP]] type 0 packet. Sometimes there is [[firewall]]s preventing a ping from receiving a reply.		ping is a tool written by the late Mike Muus to measure latency and round-trip time between two hosts connected by a network. Often it is also used to simply debug if the other host is up. It works by sending an [[ICMP]] type 8 packet to the remote host which replies with an [[ICMP]] type 0 packet. Sometimes there is a [[firewall]] preventing a ping from receiving a reply.

	This would look like so:		This would look like so:

Frankk at 06:28, 27 October 2005

2005-10-27T06:28:37Z

← Older revision		Revision as of 23:28, 26 October 2005
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	ping is a tool written by the late Mike Muus to measure latency and round-trip time between two hosts connected by ~~an [[Internet]], often~~ it is also used to simply debug if the other host is up. It works by sending an [[ICMP]] type 8 packet to the remote host which replies with an [[ICMP]] type 0 packet. Sometimes there is [[firewall]]s preventing a ping from receiving a reply.		ping is a tool written by the late Mike Muus to measure latency and round-trip time between two hosts connected by a network. Often it is also used to simply debug if the other host is up. It works by sending an [[ICMP]] type 8 packet to the remote host which replies with an [[ICMP]] type 0 packet. Sometimes there is [[firewall]]s preventing a ping from receiving a reply.

	This would look like so:		This would look like so:

Sysadmin at 19:41, 24 October 2005

2005-10-24T19:41:13Z

← Older revision		Revision as of 12:41, 24 October 2005
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	--- mail.yashy.com ping statistics ---		--- mail.yashy.com ping statistics ---
	1 packets transmitted, 0 packets received, 100.0% packet loss		1 packets transmitted, 0 packets received, 100.0% packet loss

			One of the original [[DoS]] was a simple ping flood. If you have more bandwidth then your victim, you can do
			# ping -f example.com.
			and slow your victim to a grinding halt.

	A similar tool to ping would be [[traceroute]].		A similar tool to ping would be [[traceroute]].

Pbug at 18:56, 24 October 2005

2005-10-24T18:56:22Z

← Older revision		Revision as of 11:56, 24 October 2005
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	ping is a tool written by the late Mike Muus to measure latency and round-trip time between two hosts connected by an [[Internet]], often it is also used to simply debug if the other host is up. It works by sending an [[ICMP]] type 8 packet to the remote host which replies with an [[ICMP]] type 0 packet. Sometimes there is ~~firewalls~~ preventing a ping from receiving a reply.		ping is a tool written by the late Mike Muus to measure latency and round-trip time between two hosts connected by an [[Internet]], often it is also used to simply debug if the other host is up. It works by sending an [[ICMP]] type 8 packet to the remote host which replies with an [[ICMP]] type 0 packet. Sometimes there is [[firewall]]s preventing a ping from receiving a reply.

	This would look like so:		This would look like so:

Pbug at 11:49, 24 October 2005

2005-10-24T11:49:48Z

New page

ping is a tool written by the late Mike Muus to measure latency and round-trip time between two hosts connected by an [[Internet]], often it is also used to simply debug if the other host is up. It works by sending an [[ICMP]] type 8 packet to the remote host which replies with an [[ICMP]] type 0 packet. Sometimes there is firewalls preventing a ping from receiving a reply.

This would look like so:
$ ping -c 1 www.yashy.com
PING mail.yashy.com (206.248.137.44): 56 data bytes
--- mail.yashy.com ping statistics ---
1 packets transmitted, 0 packets received, 100.0% packet loss

A similar tool to ping would be [[traceroute]].