net.ipv4.ip_forward = 1 net.ipv4.ip_dynaddr = 1 net.ipv4.icmp_echo_ignore_broadcasts = 1 net.ipv4.icmp_ignore_bogus_error_responses = 1 net.ipv4.icmp_ratelimit = 1000 net.ipv4.icmp_ratemask = 6168 net.ipv4.tcp_syncookies = 1 net.ipv4.tcp_fin_timeout = 30 net.ipv4.tcp_syn_retries = 3 net.ipv4.tcp_synack_retries = 3 net.ipv4.conf.default.arp_filter = 1 net.ipv4.conf.default.rp_filter = 0 net.ipv4.conf.default.accept_redirects = 0 net.ipv4.conf.default.accept_source_route = 0 net.ipv4.conf.default.log_martians = 1 net.ipv4.conf.all.arp_filter = 1 net.ipv4.conf.all.rp_filter = 0 net.ipv4.conf.all.accept_redirects = 0 net.ipv4.conf.all.accept_source_route = 0 net.ipv4.conf.all.log_martians = 1 kernel.printk = 1 4 1 7 vm.swappiness=0 vm.mmap_min_addr = 4096 vm.min_free_kbytes = 8192 # Disable IPv6 by default. net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 # Enable netfilter accounting net.netfilter.nf_conntrack_acct=1 # Disable netfilter on bridges. net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-arptables = 0