11.5 Нужен cgi-скрипт для отслеживания доступности хоста.

#!/bin/sh
export PATH=/bin:/usr/bin:/usr/local/bin
trap "" 2 3
ulimit -c 0
line=`head -1`
line=`echo "$line" | cut -s -f2- -d= | hex2char | head -1 | valid N 40`
if [ "$line" != "" ]; then
    echo -e "Content-type: text/html\n\n<HTML>\n<TITLE>Traceroute to
$line</TITLE>\n"
    echo -e "<body>\n<h3>Traceroute to $line:</h3>\n<pre>\n"
    traceroute "$line" 2>&1
    echo -e "\n</pre>\n</body>\n</html>"
else
    echo -e "Content-type: text/html\n\n<HTML>\n<TITLE>Error</TITLE>\n"
    echo -e "<body>\n<h3>ERROR: No target specified.</h3>\n"
    echo -e "\n</body>\n</html>"
fi