create crowdsec.conf

fail2ban · Dec 20, 2022 · 94b7e3f · 94b7e3f
2 parents 928d221 + 432e7e1
commit 94b7e3f
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Showing 8 changed files with 51 additions and 12 deletions.
diff --git a/config/action.d/crowdsec.conf b/config/action.d/crowdsec.conf
@@ -12,10 +12,6 @@
 # crowdsec[lapi_url="http://local-api:8080", machine_id="ReverseProxy", password="******"]
 #
 
-[INCLUDES]
-
-#before = mail-whois-common.conf
-
 [Definition]
 
 # bypass action for restored tickets
@@ -46,10 +42,7 @@ actioncheck =
 # Tags: See jail.conf(5) man page
 # Values: CMD
 #
-actionban = WHOIS_RESULT=$(whois <ip>)
- WHOIS_COUNTRY=$(echo "$WHOIS_RESULT" | grep -a -i -m 1 Country | sed -n -e 's/^.*[Cc]ountry:\s*//p')
- WHOIS_ASN=$(echo "$WHOIS_RESULT" | grep -a -i Origin | tail -1 | sed -n -e 's/^.*[Oo]rigin.*:\s*AS//p')
- WHOIS_ASNAME=$(echo "$WHOIS_RESULT" | grep -a netname | tail -1 | sed -n -e 's/^.*netname:\s*//p')
+actionban = <lookup-<lookup>/lookupinfo>
  TIME=$(LC_ALL=C date -d "@<time>" +"%%Y-%%m-%%d, %%H:%%M:%%S")
  JSON_STRING=$(/usr/bin/jq -s -R -n \
  --arg ip "<ip>" \
@@ -101,7 +94,7 @@ actionban = WHOIS_RESULT=$(whois <ip>)
  "as_number": $an,
  "as_name": $nm,
  "cn": $cn }}]')
- curl -H "Authorization: Bearer $(curl -s -X POST -H 'Content-Type: application/json' -d '{"machine_id": "<machine_id>","password": "<password>"}' <lapi_url>/v1/watchers/login | jq -r ".token")" -X POST <lapi_url>/v1/alerts -H 'Content-Type: application/json' -d "$JSON_STRING"
+ nohup curl -H "Authorization: Bearer $(curl -s -X POST -H 'Content-Type: application/json' -d '{"machine_id": "<machine_id>","password": "<password>"}' <lapi_url>/v1/watchers/login | jq -r ".token")" -X POST <lapi_url>/v1/alerts -H 'Content-Type: application/json' -d "$JSON_STRING" > /dev/null 2>&1
 
 
 # Option: actionunban
@@ -112,4 +105,18 @@ actionban = WHOIS_RESULT=$(whois <ip>)
 #
 actionunban =
 
+# Option `lookup` (default `none`) - supply `whois` to perform a lookup for country and ASN using whois command
+lookup = none
+
+[lookup-none]
+lookupinfo = WHOIS_COUNTRY=''
+ WHOIS_ASN=''
+ WHOIS_ASNAME=''
+
+[lookup-whois]
+lookupinfo = WHOIS_RESULT=$(whois <ip>)
+ WHOIS_COUNTRY=$(echo "$WHOIS_RESULT" | grep -a -i -m 1 Country | sed -n -e 's/^.*[Cc]ountry:\s*//p')
+ WHOIS_ASN=$(echo "$WHOIS_RESULT" | grep -a -i Origin | tail -1 | sed -n -e 's/^.*[Oo]rigin.*:\s*AS//p')
+ WHOIS_ASNAME=$(echo "$WHOIS_RESULT" | grep -a netname | tail -1 | sed -n -e 's/^.*netname:\s*//p')
+
 [Init]
diff --git a/config/filter.d/dante.conf b/config/filter.d/dante.conf
@@ -0,0 +1,16 @@
+# Fail2Ban filter for dante
+#
+# Make sure you have "log: error" set in your "client pass" directive
+#
+
+[INCLUDES]
+before = common.conf
+
+[Definition]
+_daemon = danted
+
+failregex = ^%(__prefix_line)sinfo: block\(1\): tcp/accept \]: <HOST>\.\d+ [\d.]+: error after reading \d+ bytes? in \d+ seconds?: (?:could not access |system password authentication failed for )user "<F-USER>[^"]+</F-USER>"
+
+[Init]
+journalmatch = _SYSTEMD_UNIT=danted.service
+
diff --git a/config/filter.d/selinux-common.conf b/config/filter.d/selinux-common.conf
@@ -14,7 +14,7 @@
 
 [Definition]
 
-failregex = ^type=%(_type)s msg=audit\(:\d+\): (user )?pid=\d+ uid=%(_uid)s auid=%(_auid)s ses=\d+ subj=%(_subj)s msg='%(_msg)s'$
+failregex = ^type=%(_type)s msg=audit\(:\d+\): (?:user )?pid=\d+ uid=%(_uid)s auid=%(_auid)s ses=\d+ subj=%(_subj)s msg='%(_msg)s'(?:\x1D|$)
 
 ignoreregex =
 

diff --git a/config/filter.d/selinux-ssh.conf b/config/filter.d/selinux-ssh.conf
@@ -15,7 +15,9 @@ _subj = (?:unconfined_u|system_u):system_r:sshd_t:s0-s0:c0\.c1023
 _exe =/usr/sbin/sshd
 _terminal = ssh
 
-_msg = op=\S+ acct=(?P<_quote_acct>"?)\S+(?P=_quote_acct) exe="%(_exe)s" hostname=(\?|(\d+\.){3}\d+) addr=<HOST> terminal=%(_terminal)s res=failed
+_anygrp = (?!acct=|exe=|addr=|terminal=|res=)\w+=(?:"[^"]+"|\S*)
+
+_msg = (?:%(_anygrp)s )*acct=(?:"<F-USER>[^"]+</F-USER>"|<F-ALT_USER>\S+</F-ALT_USER>) exe="%(_exe)s" (?:%(_anygrp)s )*addr=<ADDR> terminal=%(_terminal)s res=failed
 
 # DEV Notes:
 #

diff --git a/config/jail.conf b/config/jail.conf
@@ -978,3 +978,8 @@ banaction = %(banaction_allports)s
 [monitorix]
 port = 8080
 logpath = /var/log/monitorix-httpd
+
+[dante]
+port = 1080
+logpath = %(syslog_daemon)s
+
diff --git a/fail2ban/client/configreader.py b/fail2ban/client/configreader.py
@@ -277,7 +277,7 @@ def getOptions(self, sec, options, pOptions=None, shouldExist=False, convert=Tru
  # TODO: validate error handling here.
  except NoOptionError:
  if not optvalue is None:
- logSys.warning("'%s' not defined in '%s'. Using default one: %r"
+ logSys.debug("'%s' not defined in '%s'. Using default one: %r"
  % (optname, sec, optvalue))
  values[optname] = optvalue
  # elif logSys.getEffectiveLevel() <= logLevel:

diff --git a/fail2ban/tests/files/logs/dante b/fail2ban/tests/files/logs/dante
@@ -0,0 +1,6 @@
+# failJSON: { "time": "2005-04-14T15:35:03", "match": true , "host": "1.2.3.4" }
+Apr 14 15:35:03 vps111111 danted[17969]: info: block(1): tcp/accept ]: 1.2.3.4.50550 0.0.0.0.1080: error after reading 35 bytes in 0 seconds: could not access user "roooooooot"'s records in the system password file: no system error
+# failJSON: { "time": "2005-04-14T15:44:26", "match": true , "host": "1.2.3.4" }
+Apr 14 15:44:26 vps111111 danted[1846]: info: block(1): tcp/accept ]: 1.2.3.4.57178 0.0.0.0.1080: error after reading 18 bytes in 0 seconds: system password authentication failed for user "aland"
+# failJSON: { "time": "2005-04-14T15:44:26", "match": true , "host": "1.2.3.4" }
+Apr 14 15:44:26 vps111111 danted[1846]: info: block(1): tcp/accept ]: 1.2.3.4.57178 0.0.0.0.1080: error after reading 1 byte in 1 second: system password authentication failed for user "aland"
diff --git a/fail2ban/tests/files/logs/selinux-ssh b/fail2ban/tests/files/logs/selinux-ssh
@@ -27,3 +27,6 @@ type=USER_AUTH msg=audit(1383116263.000:603): pid=12887 uid=0 auid=4294967295 se
 
 # failJSON: { "time": "2013-10-30T07:54:08", "match": false , "host": "192.168.3.100" } 
 type=USER_LOGIN msg=audit(1383116048.000:595): pid=12354 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:sshd_t:s0-s0:c0.c1023 msg='op=login acct="dan" exe="/usr/sbin/sshd" hostname=? addr=192.168.3.100 terminal=ssh res=failed'
+
+# failJSON: { "time": "2022-11-14T00:11:11", "match": true , "host": "192.0.2.111" } 
+type=USER_AUTH msg=audit(1668381071.000:373474): pid=173582 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:sshd_t:s0-s0:c0.c1023 msg='op=PAM:authentication grantors=? acct="root" exe="/usr/sbin/sshd" hostname=192.0.2.111 addr=192.0.2.111 terminal=ssh res=failed'UID="root" AUID="unset"