/etc/prelude-lml/ruleset/ppp.rules is in prelude-lml 1.0.0-5.3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# PPP/PPTP/L2TP VPN Server rules
#
# Copyright (C) 2009 PreludeIDS Technologies. All Rights Reserved.
# Copyright (C) 2008 Alexander Afonyashin <firm@iname.com>
# Author: Alexander Afonyashin <firm@iname.com>
#
# This file is part of the Prelude-LML program.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING. If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
#
#####
# Dec 4 23:01:24 beorc pptpd[24795]: CTRL: Client 1.2.3.4 control connection started
# Dec 4 23:01:24 beorc pptpd[24795]: CTRL: Starting call (launching pppd, opening GRE)
# Dec 4 23:01:25 beorc ppp[24796]: tun2: IPCP: Selected IP address 5.6.7.8
# Logging succeed
#LOG: Dec 4 23:01:36 beorc ppp[24796]: tun2: Phase: Chap Input: RESPONSE (49 bytes from afonyashin)
regex=ppp\[(\d+)\]: (\S+): Phase: \S+ Input: RESPONSE \(\d+ bytes from (\S+)\); \
new_context=PPP_$1,expire:0; \
classification.text=VPN user authentication; \
assessment.impact.description=Authenticated attempt; \
target(0).interface=$2; \
target(0).user.category=os-device; \
target(0).user.user_id(0).type=target-user; \
target(0).user.user_id(0).name=$3; \
silent;
#LOG: Dec 4 23:01:36 beorc ppp[24796]: tun2: Phase: Chap Output: SUCCESS
regex=ppp\[(\d+)\]: \S+: Phase: \S+ Output: SUCCESS; \
require_context=PPP_$1; \
id=10100; \
revision=1; \
assessment.impact.severity=low; \
assessment.impact.completion=succeeded; \
assessment.impact.type=user; \
silent;
#LOG: Dec 4 23:01:36 beorc ppp[24796]: tun2: Phase: Chap Output: FAILURE
regex=ppp\[(\d+)\]: \S+: Phase: \S+ Output: FAILURE; \
require_context=PPP_$1; \
id=10101; \
revision=1; \
assessment.impact.severity=medium; \
assessment.impact.completion=failed; \
assessment.impact.type=user; \
silent;
#LOG: Dec 4 23:01:49 beorc pptpd[24795]: CTRL: Reaping child PPP[24796]
regex=pptpd\[(\d+)\]: CTRL: \S+ \S+ PPP\[(\d+)\]; \
require_context=PPP_$2; \
new_context=PPTPD_$1,expire:5; \
destroy_context=PPP_$2; \
silent;
#LOG: Dec 4 23:01:49 beorc pptpd[24795]: CTRL: Client 1.2.3.4 control connection finished
regex=pptpd\[(\d+)\]: CTRL: Client (\S+) control; \
require_context=PPTPD_$1; \
analyzer(0).name=ppp; \
analyzer(0).class=VPN; \
source(0).node.address(0).category=ipv4-addr; \
source(0).node.address(0).address=$2; \
last;
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