1kernel.panic=3 2kernel.core_pattern=/tmp/%e.%t.%p.%s.core 3 4net.ipv4.conf.default.arp_ignore=1 5net.ipv4.conf.all.arp_ignore=1 6net.ipv4.ip_forward=1 7net.ipv4.icmp_echo_ignore_broadcasts=1 8net.ipv4.icmp_ignore_bogus_error_responses=1 9net.ipv4.igmp_max_memberships=100 10net.ipv4.tcp_fin_timeout=30 11net.ipv4.tcp_keepalive_time=120 12net.ipv4.tcp_syncookies=1 13net.ipv4.tcp_timestamps=1 14net.ipv4.tcp_sack=1 15net.ipv4.tcp_dsack=1 16 17net.ipv6.conf.default.forwarding=1 18net.ipv6.conf.all.forwarding=1 19 20net.netfilter.nf_conntrack_acct=1 21net.netfilter.nf_conntrack_checksum=0 22net.netfilter.nf_conntrack_max=16384 23net.netfilter.nf_conntrack_tcp_timeout_established=7440 24net.netfilter.nf_conntrack_udp_timeout=60 25net.netfilter.nf_conntrack_udp_timeout_stream=180 26 27# disable bridge firewalling by default 28net.bridge.bridge-nf-call-arptables=0 29net.bridge.bridge-nf-call-ip6tables=0 30net.bridge.bridge-nf-call-iptables=0 31