net.ipv4.ip_forward = 1
net.ipv4.ip_dynaddr = 1
+# Disable Path MTU Discovery
+net.ipv4.ip_no_pmtu_disc = 1
+
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_ignore_bogus_error_responses = 1
-net.ipv4.icmp_ratemask = 88089
+net.ipv4.icmp_ratelimit = 1000
+net.ipv4.icmp_ratemask = 6168
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_fin_timeout = 30
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
# 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