2 net.ipv4.conf.default.arp_ignore=1
3 net.ipv4.conf.all.arp_ignore=1
5 net.ipv4.icmp_echo_ignore_broadcasts=1
6 net.ipv4.icmp_ignore_bogus_error_responses=1
7 net.ipv4.tcp_fin_timeout=30
8 net.ipv4.tcp_keepalive_time=120
9 net.ipv4.tcp_syncookies=1
10 net.ipv4.tcp_timestamps=0