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.tcp_ecn=1 
net.ipv4.tcp_fin_timeout=30
net.ipv4.tcp_keepalive_time=120
net.ipv4.tcp_syncookies=1
net.ipv4.tcp_timestamps=0
net.core.netdev_max_backlog=30
net.netfilter.nf_conntrack_checksum=0
net.ipv4.netfilter.ip_conntrack_checksum=0
net.ipv4.netfilter.ip_conntrack_max=16384
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established=3600
net.ipv4.netfilter.ip_conntrack_udp_timeout=60
net.ipv4.netfilter.ip_conntrack_udp_timeout_stream=180
# net.ipv6.conf.all.forwarding=1

# 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

net.netfilter.nf_conntrack_tcp_be_liberal=1


net.netfilter.nf_conntrack_tcp_timeout_established=600
net.netfilter.nf_conntrack_udp_timeout_stream=120
net.netfilter.nf_conntrack_expect_max=20480
net.ipv4.route.max_size=16384
net.ipv6.route.max_size=16384
net.ipv4.conf.all.accept_redirects=0
net.ipv4.conf.all.secure_redirects=0