Discussion
Can anyone explain this to me? I've just tried to ping www.nectar.com and it times out...
Yet the website is up and running?!
Yet the website is up and running?!
A very basic "denial of service" attack is to ping servers repeatedly, often with large packets of information, in order to slow it down by asking it to respond to sooo many pings all the time.
This is real old hat now, though, so most people don't fall for it. And lots of people simple configure their routers and/or servers to ignore ping requests.
So it's entirely believable that nectar.com have just turned off ping responses. That's all.
This is real old hat now, though, so most people don't fall for it. And lots of people simple configure their routers and/or servers to ignore ping requests.
So it's entirely believable that nectar.com have just turned off ping responses. That's all.
when you go to a website in your browser, your computer connects to the webserver from a randomly selected tcp port between 1024 and 65535, to the webservers port 80.
when you ping another computer, your computer sends icmp echo-request packets to the computer, which, sends icmp echo-reply packets back.
the webserver will be allowing tcp port 80 to get to it, otherwise there wouldn't be much point running it
, but if the pings are timing out then packet filtering of some description be it access lists, firewall etc are blocking the icmp packets.
hope this helps,
karl
when you ping another computer, your computer sends icmp echo-request packets to the computer, which, sends icmp echo-reply packets back.
the webserver will be allowing tcp port 80 to get to it, otherwise there wouldn't be much point running it
, but if the pings are timing out then packet filtering of some description be it access lists, firewall etc are blocking the icmp packets. hope this helps,
karl
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