add instance-a rules

README.md

@@ -30,7 +30,6 @@ My droplets configuration like image above.
         * In this case i'm create freestyle jobs project on jenkins which run some command and invoke ansible-playbook
 2. Configure **instance-b**
     * Register ssh-key jenkins@instance-a on DigitalOcean so this instance auto get ssh-key for deployment server
-    * Create instance-b with minimum specification 2GB of RAM
     * Let the rest configuration executed in instance-a
 
 ## Result

instance-a-firewall.yml

@@ -0,0 +1,5 @@
+---
+- name: Instance-b Playbook for firewall configuration
+  hosts: instance_b_production
+  roles:
+    - instance-a-fw

instance-a.yml

@@ -2,7 +2,9 @@
 - name: Instance-a Playbook
   hosts: instance_a
   roles:
+    - docker
     - docker-nginx
+    - jenkins
 
 
 # 3 roles yang dijalankan pada playbook ini adalah docker, jenkins, docker-nginx

instance-b-firewall.yml

@@ -2,4 +2,4 @@
 - name: Instance-b Playbook for firewall configuration
   hosts: instance_b_production
   roles:
-    - elastic-fw
+    - instance-b-fw

roles/instance-a-fw/tasks/main.yml

@@ -0,0 +1,23 @@
+---
+- name: ufw allow ssh
+  become: yes
+  ufw:
+    rule: allow
+    port: ssh
+    proto: tcp
+
+- name: enable ufw
+  become: yes
+  ufw:
+    state: enabled
+
+- name: Render configuration starter from template
+  become: yes
+  template:
+    src: before.rules.j2
+    dest: /etc/ufw/before.rules
+
+- name: Reload configuration
+  become: yes
+  ufw:
+    state: reloaded

roles/instance-a-fw/templates/before.rules.j2

@@ -0,0 +1,82 @@
+#
+# rules.before
+#
+# Rules that should be run before the ufw command line added rules. Custom
+# rules should be added to one of these chains:
+#   ufw-before-input
+#   ufw-before-output
+#   ufw-before-forward
+#
+
+# Don't delete these required lines, otherwise there will be errors
+*filter
+:ufw-before-input - [0:0]
+:ufw-before-output - [0:0]
+:ufw-before-forward - [0:0]
+:ufw-not-local - [0:0]
+# End required lines
+
+
+# allow all on loopback
+-A ufw-before-input -i lo -j ACCEPT
+-A ufw-before-output -o lo -j ACCEPT
+
+# quickly process packets for which we already have a connection
+-A ufw-before-input -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+-A ufw-before-output -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+-A ufw-before-forward -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+
+# drop INVALID packets (logs these in loglevel medium and higher)
+-A ufw-before-input -m conntrack --ctstate INVALID -j ufw-logging-deny
+-A ufw-before-input -m conntrack --ctstate INVALID -j DROP
+
+# ok icmp codes for INPUT
+# -A ufw-before-input -p icmp --icmp-type destination-unreachable -j ACCEPT
+# -A ufw-before-input -p icmp --icmp-type time-exceeded -j ACCEPT
+# -A ufw-before-input -p icmp --icmp-type parameter-problem -j ACCEPT
+# -A ufw-before-input -p icmp --icmp-type echo-request -j ACCEPT
+
+# deny icmp codes for INPUT
+-A ufw-before-input -p icmp --icmp-type destination-unreachable -j DROP
+-A ufw-before-input -p icmp --icmp-type time-exceeded -j DROP
+-A ufw-before-input -p icmp --icmp-type parameter-problem -j DROP
+-A ufw-before-input -p icmp --icmp-type echo-request -j DROP
+
+# ok icmp code for FORWARD
+-A ufw-before-forward -p icmp --icmp-type destination-unreachable -j ACCEPT
+-A ufw-before-forward -p icmp --icmp-type time-exceeded -j ACCEPT
+-A ufw-before-forward -p icmp --icmp-type parameter-problem -j ACCEPT
+-A ufw-before-forward -p icmp --icmp-type echo-request -j ACCEPT
+
+# allow dhcp client to work
+-A ufw-before-input -p udp --sport 67 --dport 68 -j ACCEPT
+
+#
+# ufw-not-local
+#
+-A ufw-before-input -j ufw-not-local
+
+# if LOCAL, RETURN
+-A ufw-not-local -m addrtype --dst-type LOCAL -j RETURN
+
+# if MULTICAST, RETURN
+-A ufw-not-local -m addrtype --dst-type MULTICAST -j RETURN
+
+# if BROADCAST, RETURN
+-A ufw-not-local -m addrtype --dst-type BROADCAST -j RETURN
+
+# all other non-local packets are dropped
+-A ufw-not-local -m limit --limit 3/min --limit-burst 10 -j ufw-logging-deny
+-A ufw-not-local -j DROP
+
+# allow MULTICAST mDNS for service discovery (be sure the MULTICAST line above
+# is uncommented)
+-A ufw-before-input -p udp -d 224.0.0.251 --dport 5353 -j ACCEPT
+
+# allow MULTICAST UPnP for service discovery (be sure the MULTICAST line above
+# is uncommented)
+-A ufw-before-input -p udp -d 239.255.255.250 --dport 1900 -j ACCEPT
+
+# don't delete the 'COMMIT' line or these rules won't be processed
+COMMIT
+root@in