diff --git a/Web/details.wml b/Web/details.wml index fb65b57..93a79f9 100644 --- a/Web/details.wml +++ b/Web/details.wml @@ -5,12 +5,15 @@
echoping assumes the remote host accepts such connections. Experience show that -most Internet routers do and many hosts also. However, some Unices are not -shipped with this service enabled and, anyway, the administrator is always -free to close it (I think they shouldn't). echoping has therefore less chance -to succeed than ping or bing. (On a typical Unix box, "echo" service is -configured in /etc/inetd.conf but see the CERT advisory.) +
echoping, with its default setting, assumes the remote host accepts +such connections. Experience show that most Internet routers or hosts +do not. Some Unices are not shipped with this service enabled and, +anyway, the administrator is always free to close it (I think they +shouldn't). echoping has therefore less chance to succeed than ping or +bing. (On a typical Unix box, "echo" service is configured in +/etc/inetd.conf but see the CERT +advisory.)
Use all of them with care, the result is not obvious to interpret. +
If you are interested in Internet measurements, there is an Internet Engineering Task Force +Working Group, IPPM (IP +Performance Metrics) which produces many fine RFC that are really +good to read. I appreciate RFC 2330 and 3148. +
And don't forget to read RFC 1470 ("Tools for Monitoring and Debugging TCP/IP Internets and Interconnected Devices"), specially its "Benchmark" section and the Richard Stevens' books (all of them), published by