SuSE Linux: Versions up to (including) 7.3
A faq along with detailed information about this topic can be found for instance under http://www.ircnetops.org/smurf/faq.php
The command
cat /proc/sys/net/ipv4/icmp_echo_ignore_broadcastsshows the current system configuration while the system is running .
If the output is 0
, your system replies to ICMP broadcasts and
you should proceed as explained below.
If the output is 1
, you have not to act immediately,
but you should check, e.g. as described below, if the configuration is long-term guaranteed.
echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
To maintain an efficient configuration also in the long run, please insert
the whole line of the echo
command in the file boot.local
,
which can be found in directory /sbin/init.d/
until SuSE Linux 7.0
and in /etc/init.d/
in higher SuSE Linux versions.
SDB-lmuelle_smurf_amplifier
)