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diff --git a/html/sntp.html b/html/sntp.html index 839271e5b738..93a34abe310b 100644 --- a/html/sntp.html +++ b/html/sntp.html @@ -4,22 +4,21 @@ <head> <meta http-equiv="content-type" content="text/html;charset=iso-8859-1"> - <title>Simple Network Time Protocol (SNTP) Client</title> + <title><tt>sntp</tt> - Simple Network Time Protocol (SNTP) Client</title> <link href="scripts/style.css" type="text/css" rel="stylesheet"> </head> <body> - <h3>Simple Network Time Protocol (SNTP) Client</h3> + <h3><tt>sntp</tt> - Simple Network Time Protocol (SNTP) Client</h3> <img src="pic/dogsnake.gif" alt="gif" align="left"><a href="http://www.eecis.udel.edu/~mills/pictures.html">from <i>Alice's Adventures in Wonderland</i>, Lewis Carroll</a> - <p>S is for snakeoil</p> - <p>Last update: <csobj format="ShortTime" h="25" locale="00000409" region="0" t="DateTime" w="61">18:50</csobj> UTC <csobj format="LongDate" h="25" locale="00000409" region="0" t="DateTime" w="246">Thursday, July 28, 2005</csobj></p> + <p>S is for snakeoil.</p> + <p>Last update: <csobj format="ShortTime" h="25" locale="00000409" region="0" t="DateTime" w="61">16:31</csobj> UTC <csobj format="LongDate" h="25" locale="00000409" region="0" t="DateTime" w="289">Wednesday, March 12, 2008</csobj></p> <br clear="left"> <hr> <h4>Synopsis</h4> <tt>sntp [{-h --help -?}][{ -v -V -W }][{-r -a}][-P <i>prompt</i>][-e <i>minerr</i>][-E <i>maxerr</i>][-c <i>count</i>][-d <i>delay</i>][address(es)]</tt> <h4>Description</h4> - <p>This program is a Simple Network Time Protocol (SNTP) client that can be used to query a Network TIme Protocol (NTP) server and display the time offset of the system clock relative to the server clock. Run as root it can correct the system clock to this offset as well. It can be run as an interactive command or from a script by a <tt>cron</tt> job. The program implements the SNTP protocol defined in RFC-2030, which is a subset of the NTP protocol defined in RFC-1305, but does not provide the sanity checks, access controls, security functions and mitigation algorithms as in the full NTP implementation.</p> - <p>While this program can do other things, including operation as a primitive server, some of these things are truly dangerous in a ubiquitous public time server network. A full disclosure is in the man page in the <tt>./sntp</tt> directory, but be truly advised RFC-2030 specifically <b>forbids</b> a SNTP client to operate as a server for other NTP or SNTP clients. If such operation is contemplated, do <b>not</b> allow access by clients on the public Internet.</p> + <p>This program is a Simple Network Time Protocol (SNTP) client that can be used to query a Network Time Protocol (NTP) server and display the time offset of the system clock relative to the server clock. Run as root it can correct the system clock to this offset as well. It can be run as an interactive command or from a script by a <tt>cron</tt> job. The program implements the SNTP protocol defined in RFC-4330, which is a subset of the NTP protocol defined in RFC-1305, but does not provide the sanity checks, access controls, security functions and mitigation algorithms as in the full NTP implementation.</p> <p>By default, <tt>sntp</tt> writes the local date and time (i.e., not UTC) to the standard output in the format</p> <p><tt>1996 Oct 15 20:17:25.123 + 4.567 +/- 0.089 secs</tt>,</p> <p>where the <tt>+ 4.567 +/- 0.089 secs</tt> indicates the time offset and error bound of the system clock relative to the server clock.</p> |