net.ipv4.conf.default.arp_ignore=1
net.ipv4.conf.all.arp_ignore=1
net.ipv4.conf.all.forwarding=0
net.ipv4.conf.all.send_redirects=0
net.ipv4.tcp_ecn=0
net.ipv4.tcp_fin_timeout=30
net.ipv4.tcp_keepalive_time=120
net.ipv4.tcp_syncookies=1
net.core.netdev_max_backlog=30
net.netfilter.nf_conntrack_checksum=0

#Do not accept source routing
net.ipv4.conf.all.accept_source_route=0
net.ipv4.conf.all.accept_redirects=0
net.ipv4.conf.default.accept_source_route=0
net.ipv4.conf.default.accept_redirects=0
net.ipv4.icmp_echo_ignore_broadcasts=1
net.ipv4.icmp_ignore_bogus_error_responses=1
net.ipv4.ip_forward=0

net.ipv6.conf.default.accept_dad=0
net.ipv6.conf.default.accept_ra=0
net.ipv6.conf.default.accept_redirects=0
net.ipv6.conf.all.accept_dad=0
net.ipv6.conf.all.accept_ra=0
net.ipv6.conf.all.accept_redirects=0

# Learn Prefix Information in Router Advertisement
net.ipv6.conf.default.accept_ra_pinfo = 0
net.ipv6.conf.all.accept_ra_pinfo = 0

# Setting controls whether the system will accept Hop Limit settings from a router advertisement
net.ipv6.conf.default.accept_ra_defrtr = 0
net.ipv6.conf.all.accept_ra_defrtr = 0

#router advertisements can cause the system to assign a global unicast address to an interface
net.ipv6.conf.default.autoconf = 0
net.ipv6.conf.all.autoconf = 0

#how many neighbor solicitations to send out per address?
net.ipv6.conf.default.dad_transmits = 3
net.ipv6.conf.all.dad_transmits = 3

# Enable forwarding, otherwise not all local route are examined
net.ipv6.conf.all.forwarding=1
net.ipv6.conf.default.forwarding=0