Merge pull request fail2ban#1663 from jjeziorny/netscaler-action

Introduced citrix netscaler action

ChangeLog

@@ -25,6 +25,7 @@ releases.
 
 ### New Features
 * New Actions:
+    - action.d/netscaler: Block IPs on a Citrix Netscaler ADC (gh-1663)
 
 * New Filters:
 

config/action.d/netscaler.conf

@@ -0,0 +1,33 @@
+# Fail2ban Citrix Netscaler Action
+# by Juliano Jeziorny
+# juliano@jeziorny.eu
+#
+# The script will add offender IPs to a dataset on netscaler, the dataset can then be used to block the IPs at a cs/vserver or global level
+# This dataset is then used to block IPs using responder policies on the netscaler.
+# 
+# The script assumes using HTTPS with unsecure certificate to access the netscaler, 
+# if you have a valid certificate installed remove the -k from the curl lines, or if you want http change it accordingly (and remove the -k)
+# 
+# This action depends on curl
+#
+# You need to populate the 3 options inside Init
+#
+# ns_host: IP or hostname of netslcaer appliance
+# ns_auth: username:password, suggest base64 encoded for a little added security (echo -n "username:password" | base64)
+# ns_dataset:  Name of the netscaler dataset holding the IPs to be blocked.
+# 
+# For further details on how to use it please check http://blog.ckzone.eu/2017/01/fail2ban-action-for-citrix-netscaler.html
+
+[Init]
+ns_host = 
+ns_auth = 
+ns_dataset = 
+
+[Definition]
+actionstart = curl -kH 'Authorization: Basic <ns_auth>' https://<ns_host>/nitro/v1/config
+
+actioncheck = 
+
+actionban = curl -k -H 'Authorization: Basic <ns_auth>' -X PUT -d '{"policydataset_value_binding":{"name":"<ns_dataset>","value":"<ip>"}}' https://<ns_host>/nitro/v1/config/
+
+actionunban = curl -H 'Authorization: Basic <ns_auth>' -X DELETE -k "https://<ns_host>/nitro/v1/config/policydataset_value_binding/<ns_dataset>?args=value:<ip>"