Merge branch 'master' of https://github.com/fpytloun/rpi2-gen-image into fpytloun-master

1 files changed, 43 insertions, 0 deletions

diff --git a/files/iptables/iptables.rules b/files/iptables/iptables.rules
new file mode 100644
index 0000000..2fc4ca4
--- /dev/null
+++ b/files/iptables/iptables.rules
@@ -0,0 +1,43 @@
+*filter
+:INPUT DROP [0:0]
+:FORWARD DROP [0:0]
+:OUTPUT ACCEPT [0:0]
+:TCP - [0:0]
+:UDP - [0:0]
+:SSH - [0:0]
+
+# Rate limit ping requests
+-A INPUT -p icmp --icmp-type echo-request -m limit --limit 30/min --limit-burst 8 -j ACCEPT
+-A INPUT -p icmp --icmp-type echo-request -j DROP
+
+# Accept established connections
+-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+
+# Accept all traffic on loopback interface
+-A INPUT -i lo -j ACCEPT
+
+# Drop packets declared invalid
+-A INPUT -m conntrack --ctstate INVALID -j DROP
+
+# SSH rate limiting
+-A INPUT -p tcp --dport ssh -m conntrack --ctstate NEW -j SSH
+-A SSH -m recent --name sshbf --rttl --rcheck --hitcount 3 --seconds 10 -j DROP
+-A SSH -m recent --name sshbf --rttl --rcheck --hitcount 20 --seconds 1800 -j DROP
+-A SSH -m recent --name sshbf --set -j ACCEPT
+
+# Send TCP and UDP connections to their respective rules chain
+-A INPUT -p udp -m conntrack --ctstate NEW -j UDP
+-A INPUT -p tcp --syn -m conntrack --ctstate NEW -j TCP
+
+# Reject dropped packets with a RFC compliant responce
+-A INPUT -p udp -j REJECT --reject-with icmp-port-unreachable
+-A INPUT -p tcp -j REJECT --reject-with tcp-rst
+-A INPUT -j REJECT --reject-with icmp-proto-unreachable
+
+## TCP PORT RULES
+# -A TCP -p tcp -j LOG
+
+## UDP PORT RULES
+# -A UDP -p udp -j LOG
+
+COMMIT