kernel.panic=3 net.ipv4.conf.default.arp_ignore=1 net.ipv4.conf.all.arp_ignore=1 net.ipv4.ip_forward=1 net.ipv4.icmp_echo_ignore_broadcasts=1 net.ipv4.icmp_ignore_bogus_error_responses=1 net.ipv4.igmp_max_memberships=100 net.ipv4.tcp_ecn=0 net.ipv4.tcp_fin_timeout=30 net.ipv4.tcp_keepalive_time=120 net.ipv4.tcp_syncookies=1 net.ipv4.tcp_timestamps=1 net.ipv4.tcp_sack=1 net.ipv4.tcp_dsack=1 net.ipv4.tcp_fastopen=3 net.ipv6.conf.default.forwarding=1 net.ipv6.conf.all.forwarding=1 net.netfilter.nf_conntrack_acct=1 net.netfilter.nf_conntrack_checksum=0 net.netfilter.nf_conntrack_max=65536 net.netfilter.nf_conntrack_tcp_timeout_established=7440 net.netfilter.nf_conntrack_udp_timeout=60 net.netfilter.nf_conntrack_udp_timeout_stream=180 net.netfilter.nf_conntrack_skip_filter=0 # disable bridge firewalling by default net.bridge.bridge-nf-call-arptables=0 net.bridge.bridge-nf-call-ip6tables=0 net.bridge.bridge-nf-call-iptables=0