sysctl tweaks

openwrt/common/etc/sysctl.conf

@@ -0,0 +1,31 @@
+vm.swappiness = 10
+
+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=0
+net.ipv4.tcp_fin_timeout=30
+net.ipv4.tcp_keepalive_time=120
+net.ipv4.tcp_syncookies=1
+net.ipv4.tcp_timestamps=1
+net.ipv4.tcp_sack=1
+net.ipv4.tcp_dsack=1
+
+net.ipv6.conf.default.forwarding=1
+net.ipv6.conf.all.forwarding=1
+
+net.netfilter.nf_conntrack_acct=1
+net.netfilter.nf_conntrack_checksum=0
+net.netfilter.nf_conntrack_max=16384
+net.netfilter.nf_conntrack_tcp_timeout_established=7440
+net.netfilter.nf_conntrack_udp_timeout=60
+net.netfilter.nf_conntrack_udp_timeout_stream=180
+net.netfilter.nf_conntrack_skip_filter=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