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diff --git a/src/Propellor/Property/Fail2Ban.hs b/src/Propellor/Property/Fail2Ban.hs
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+++ b/src/Propellor/Property/Fail2Ban.hs
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+module Propellor.Property.Fail2Ban where
+
+import Propellor.Base
+import qualified Propellor.Property.Apt as Apt
+import qualified Propellor.Property.Service as Service
+import Propellor.Property.ConfFile
+
+installed :: Property NoInfo
+installed = Apt.serviceInstalledRunning "fail2ban"
+
+reloaded :: Property NoInfo
+reloaded = Service.reloaded "fail2ban"
+
+type Jail = String
+
+-- | By default, fail2ban only enables the ssh jail, but many others
+-- are available to be enabled, for example "postfix-sasl"
+jailEnabled :: Jail -> Property NoInfo
+jailEnabled name = jailConfigured name "enabled" "true"
+	`onChange` reloaded
+
+-- | Configures a jail. For example:
+--
+-- > jailConfigured "sshd" "port" "2222"
+jailConfigured :: Jail -> IniKey -> String -> Property NoInfo
+jailConfigured name key value = 
+	jailConfFile name `containsIniSetting` (name, key, value)
+
+jailConfFile :: Jail -> FilePath
+jailConfFile name = "/etc/fail2ban/jail.d/" ++ name ++ ".conf"