mirror of https://github.com/fail2ban/fail2ban
New interpolation feature for definition config readers - `<known/parameter>`, as extension to interpolation `%(known/parameter)s`, that does not works for filter and action init parameters;
sebres
parent
5767191988
commit
94cffece12
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@ -26,6 +26,13 @@ ver. 0.9.4 (2015/XX/XXX) - wanna-be-released
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with new default variable `banaction_allports` (gh-1216)
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- New Features:
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* New interpolation feature for definition config readers - `<known/parameter>`
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(means last known init definition of filters or actions with name `parameter`).
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This interpolation makes possible to extend a parameters of stock filter or
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action directly in jail inside jail.local file, without creating a separately
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filter.d/*.local file.
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As extension to interpolation `%(known/parameter)s`, that does not works for
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filter and action init parameters
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* New filters:
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- openhab - domotic software authentication failure with the
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rest api and web interface (gh-1223)
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@ -285,8 +285,10 @@ class DefinitionInitConfigReader(ConfigReader):
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if self.has_section("Init"):
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for opt in self.options("Init"):
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v = self.get("Init", opt)
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self._initOpts['known/'+opt] = v
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if not opt in self._initOpts:
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self._initOpts[opt] = self.get("Init", opt)
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self._initOpts[opt] = v
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def convert(self):
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raise NotImplementedError
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@ -165,11 +165,11 @@ class JailReaderTest(LogCaptureTestCase):
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self.__share_cfg = {}
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def testIncorrectJail(self):
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jail = JailReader('XXXABSENTXXX', basedir=CONFIG_DIR, share_config = self.__share_cfg)
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jail = JailReader('XXXABSENTXXX', basedir=CONFIG_DIR, share_config=self.__share_cfg)
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self.assertRaises(ValueError, jail.read)
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def testJailActionEmpty(self):
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jail = JailReader('emptyaction', basedir=IMPERFECT_CONFIG, share_config = self.__share_cfg)
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jail = JailReader('emptyaction', basedir=IMPERFECT_CONFIG, share_config=self.__share_cfg)
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self.assertTrue(jail.read())
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self.assertTrue(jail.getOptions())
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self.assertTrue(jail.isEnabled())
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@ -177,7 +177,7 @@ class JailReaderTest(LogCaptureTestCase):
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self.assertLogged('No actions were defined for emptyaction')
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def testJailActionFilterMissing(self):
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jail = JailReader('missingbitsjail', basedir=IMPERFECT_CONFIG, share_config = self.__share_cfg)
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jail = JailReader('missingbitsjail', basedir=IMPERFECT_CONFIG, share_config=self.__share_cfg)
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self.assertTrue(jail.read())
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self.assertFalse(jail.getOptions())
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self.assertTrue(jail.isEnabled())
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@ -200,7 +200,7 @@ class JailReaderTest(LogCaptureTestCase):
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if STOCK:
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def testStockSSHJail(self):
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jail = JailReader('sshd', basedir=CONFIG_DIR, share_config = self.__share_cfg) # we are running tests from root project dir atm
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jail = JailReader('sshd', basedir=CONFIG_DIR, share_config=self.__share_cfg) # we are running tests from root project dir atm
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self.assertTrue(jail.read())
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self.assertTrue(jail.getOptions())
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self.assertFalse(jail.isEnabled())
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@ -274,6 +274,10 @@ class JailReaderTest(LogCaptureTestCase):
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class FilterReaderTest(unittest.TestCase):
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def __init__(self, *args, **kwargs):
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super(FilterReaderTest, self).__init__(*args, **kwargs)
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self.__share_cfg = {}
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def testConvert(self):
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output = [['set', 'testcase01', 'addfailregex',
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"^\\s*(?:\\S+ )?(?:kernel: \\[\\d+\\.\\d+\\] )?(?:@vserver_\\S+ )"
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@ -311,9 +315,8 @@ class FilterReaderTest(unittest.TestCase):
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# is unreliable
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self.assertEqual(sorted(filterReader.convert()), sorted(output))
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filterReader = FilterReader(
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"testcase01", "testcase01", {'maxlines': "5"})
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filterReader.setBaseDir(TEST_FILES_DIR)
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filterReader = FilterReader("testcase01", "testcase01", {'maxlines': "5"},
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share_config=self.__share_cfg, basedir=TEST_FILES_DIR)
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filterReader.read()
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#filterReader.getOptions(["failregex", "ignoreregex"])
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filterReader.getOptions(None)
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@ -322,8 +325,8 @@ class FilterReaderTest(unittest.TestCase):
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def testFilterReaderSubstitionDefault(self):
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output = [['set', 'jailname', 'addfailregex', 'to=sweet@example.com fromip=<IP>']]
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filterReader = FilterReader('substition', "jailname", {})
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filterReader.setBaseDir(TEST_FILES_DIR)
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filterReader = FilterReader('substition', "jailname", {},
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share_config=self.__share_cfg, basedir=TEST_FILES_DIR)
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filterReader.read()
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filterReader.getOptions(None)
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c = filterReader.convert()
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@ -331,16 +334,34 @@ class FilterReaderTest(unittest.TestCase):
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def testFilterReaderSubstitionSet(self):
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output = [['set', 'jailname', 'addfailregex', 'to=sour@example.com fromip=<IP>']]
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filterReader = FilterReader('substition', "jailname", {'honeypot': 'sour@example.com'})
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filterReader.setBaseDir(TEST_FILES_DIR)
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filterReader = FilterReader('substition', "jailname", {'honeypot': 'sour@example.com'},
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share_config=self.__share_cfg, basedir=TEST_FILES_DIR)
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filterReader.read()
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filterReader.getOptions(None)
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c = filterReader.convert()
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self.assertEqual(sorted(c), sorted(output))
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def testFilterReaderSubstitionKnown(self):
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output = [['set', 'jailname', 'addfailregex', 'to=test,sweet@example.com,test2,sweet@example.com fromip=<IP>']]
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filterName, filterOpt = JailReader.extractOptions(
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'substition[honeypot="<sweet>,<known/honeypot>", sweet="test,<known/honeypot>,test2"]')
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filterReader = FilterReader('substition', "jailname", filterOpt,
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share_config=self.__share_cfg, basedir=TEST_FILES_DIR)
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filterReader.read()
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filterReader.getOptions(None)
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c = filterReader.convert()
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self.assertEqual(sorted(c), sorted(output))
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def testFilterReaderSubstitionFail(self):
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filterReader = FilterReader('substition', "jailname", {'honeypot': '<sweet>', 'sweet': '<honeypot>'})
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filterReader.setBaseDir(TEST_FILES_DIR)
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# directly subst the same var :
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filterReader = FilterReader('substition', "jailname", {'honeypot': '<honeypot>'},
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share_config=self.__share_cfg, basedir=TEST_FILES_DIR)
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filterReader.read()
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filterReader.getOptions(None)
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self.assertRaises(ValueError, FilterReader.convert, filterReader)
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# cross subst the same var :
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filterReader = FilterReader('substition', "jailname", {'honeypot': '<sweet>', 'sweet': '<honeypot>'},
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share_config=self.__share_cfg, basedir=TEST_FILES_DIR)
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filterReader.read()
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filterReader.getOptions(None)
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self.assertRaises(ValueError, FilterReader.convert, filterReader)
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@ -508,12 +529,13 @@ class JailsReaderTest(LogCaptureTestCase):
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if jail == 'INCLUDES':
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continue
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filterName = jails.get(jail, 'filter')
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filterName, filterOpt = JailReader.extractOptions(filterName)
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allFilters.add(filterName)
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self.assertTrue(len(filterName))
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# moreover we must have a file for it
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# and it must be readable as a Filter
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filterReader = FilterReader(filterName, jail, {})
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filterReader.setBaseDir(CONFIG_DIR)
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filterReader = FilterReader(filterName, jail, filterOpt,
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share_config=self.__share_cfg, basedir=CONFIG_DIR)
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self.assertTrue(filterReader.read(),"Failed to read filter:" + filterName) # opens fine
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filterReader.getOptions({}) # reads fine
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@ -551,7 +573,10 @@ class JailsReaderTest(LogCaptureTestCase):
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filters = set(os.path.splitext(os.path.split(a)[1])[0]
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for a in glob.glob(os.path.join('config', 'filter.d', '*.conf'))
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if not a.endswith('common.conf'))
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filters_jail = set(jail.options['filter'] for jail in jails.jails)
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# get filters of all jails (filter names without options inside filter[...])
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filters_jail = set(
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JailReader.extractOptions(jail.options['filter'])[0] for jail in jails.jails
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)
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self.maxDiff = None
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self.assertTrue(filters.issubset(filters_jail),
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"More filters exists than are referenced in stock jail.conf %r" % filters.difference(filters_jail))
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@ -89,13 +89,33 @@ indicates that the specified file is to be parsed before the current file.
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indicates that the specified file is to be parsed after the current file.
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.RE
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Using Python "string interpolation" mechanisms, other definitions are allowed and can later be used within other definitions as %(name)s. For example.
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Using Python "string interpolation" mechanisms, other definitions are allowed and can later be used within other definitions as %(name)s.
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Additionaly fail2ban has an extended interpolation feature named \fB%(known/parameter)s\fR (means last known option with name \fBparameter\fR). This interpolation makes possible to extend a stock filter or jail regexp in .local file (opposite to simply set failregex/ignoreregex that overwrites it). For example.
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.RS
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.nf
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baduseragents = IE|wget
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failregex = %(known/failregex)s
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useragent=%(baduseragents)s
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.fi
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.RE
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Additionally to interpolation \fB%(known/parameter)s\fR, that does not works for filter/action init parameters, an interpolation tag \fB<known/parameter>\fR can be used (means last known init definition of filters or actions with name \fBparameter\fR). This interpolation makes possible to extend a parameters of stock filter or action directly in jail inside \fIjail.conf/jail.local\fR file without creating a separately filter.d/*.local file. For example.
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.RS
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failregex = useragent=%(baduseragents)s
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# filter.d/test.conf:
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.nf
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[Init]
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test.method = GET
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baduseragents = IE|wget
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[Definition]
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failregex = ^%(__prefix_line)\\s+"<test.method>"\\s+test\\s+regexp\\s+-\\s+useragent=(?:<baduseragents>)
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# jail.local:
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[test]
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# use filter "test", overwrite method to "POST" and extend known bad agents with "badagent":
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filter = test[test.method=POST, baduseragents="badagent|<known/baduseragents>"]
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.fi
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.RE
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Comments: use '#' for comment lines and '; ' (space is important) for inline comments. When using Python2.X '; ' can only be used on the first line due to an Python library bug.
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@ -253,7 +273,7 @@ The maximum period of time in seconds that a command can executed, before being
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Commands specified in the [Definition] section are executed through a system shell so shell redirection and process control is allowed. The commands should
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return 0, otherwise error would be logged. Moreover if \fBactioncheck\fR exits with non-0 status, it is taken as indication that firewall status has changed and fail2ban needs to reinitialize itself (i.e. issue \fBactionstop\fR and \fBactionstart\fR commands).
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Tags are enclosed in <>. All the elements of [Init] are tags that are replaced in all action commands. Tags can be added by the
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\fBfail2ban-client\fR using the "set <JAIL> action <ACT>" command. \fB<br>\fR is a tag that is always a new line (\\n).
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\fBfail2ban-client\fR using the "set <JAIL> action <ACT>" command. \fB<br>\fR is a tag that is always a new line (\\n).
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More than a single command is allowed to be specified. Each command needs to be on a separate line and indented with whitespace(s) without blank lines. The following example defines
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two commands to be executed.
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@ -312,7 +332,7 @@ is the regex to identify log entries that should be ignored by Fail2Ban, even if
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.PP
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Similar to actions, filters have an [Init] section which can be overridden in \fIjail.conf/jail.local\fR. The filter [Init] section is limited to the following options:
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Similar to actions, filters have an [Init] section which can be overridden in \fIjail.conf/jail.local\fR. Besides the filter-specific settings, the filter [Init] section can be used to set following standard options:
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.TP
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\fBmaxlines\fR
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specifies the maximum number of lines to buffer to match multi-line regexs. For some log formats this will not required to be changed. Other logs may require to increase this value if a particular log file is frequently written to.
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@ -327,6 +347,8 @@ Also, special values of \fIEpoch\fR (UNIX Timestamp), \fITAI64N\fR and \fIISO860
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\fBjournalmatch\fR
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specifies the systemd journal match used to filter the journal entries. See \fBjournalctl(1)\fR and \fBsystemd.journal-fields(7)\fR for matches syntax and more details on special journal fields. This option is only valid for the \fIsystemd\fR backend.
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.PP
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Similar to actions [Init] section enables filter-specific settings. All parameters specified in [Init] section can be redefined or extended in \fIjail.conf/jail.local\fR.
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Filters can also have a section called [INCLUDES]. This is used to read other configuration files.
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.TP
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