net.ipv4.conf.all.log_martians = 1
kernel.printk = 1 4 1 7
-vm.swappiness=0
+vm.swappiness=1
vm.mmap_min_addr = 4096
vm.min_free_kbytes = 8192
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