Ping: Difference between revisions
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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 | 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: | ||
Revision as of 22:28, 26 October 2005
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 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
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.
