On 08/19/2012 06:06 AM, Max wrote: > It is necessary to limit the number of connections to sshwithiptables, > for example: > /sbin/iptables -p tcp -syn -dport 22-m connlimit -connlimit-above 3 -j DROP And do not forget: echo "1" > /proc/sys/net/ipv4/tcp_syncookies (note: there's even an example in /etc/sysctl.conf with a link to an article explaining what syncookies are...) Thomas