+vm.swappiness=1
+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
+
+# Try to keep kernel address exposures out of various /proc files (kallsyms, modules, etc).
+kernel.kptr_restrict = 2
+
+# Avoid kernel memory address exposures via dmesg.
+kernel.dmesg_restrict = 1