# 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>"