Set systcl values in exit-ipv4

roles/exit-ipv4/defaults/main.yml

@@ -0,0 +1,3 @@
+---
+
+conntrack_max: 131072

roles/exit-ipv4/tasks/main.yml

@@ -3,6 +3,12 @@
 - name: Install iptables-persistent
   apt: name=iptables-persistent state=present
 
+- name: Enable IPv4 routing
+  sysctl: name=net.ipv4.ip_forward value=1 state=present
+
+- name: Increas conntrack limit
+  sysctl: name=net.netfilter.nf_conntrack_max value={{ conntrack_max }} state=present
+
 - name: Configure iptables
   template: src=rules.v4.j2 dest=/etc/iptables/rules.v4
   notify: Reload iptables