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6e5a566d7f
PF allows us to log rdr rules. The syntax to enable this is found in
pf.conf under the syntax grammar section for rdr-rule.
This commit extends Bastille's command line interface to allow users
to choose to log their rdr rules using the pf.conf syntax -
``````````````````````````````````````````````````````
tcp|udp host_port jail_port [log ['(' logopts ')'] ]
``````````````````````````````````````````````````````
Here, the syntax after jail_port is optional. This is sufficient to
provide backwards compatibility. The keyword 'log' enables logging with
the default options. The user can also provide custom options -
logopts - whose the syntax and allowed keywords are defined in pf.conf.
It's left to the user to supply correct logopts as the code does not
verify those values or their syntax.
194 lines
6.5 KiB
Bash
194 lines
6.5 KiB
Bash
#!/bin/sh
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#
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# Copyright (c) 2018-2022, Christer Edwards <christer.edwards@gmail.com>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# * Neither the name of the copyright holder nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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. /usr/local/share/bastille/common.sh
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. /usr/local/etc/bastille/bastille.conf
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usage() {
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error_exit "Usage: bastille rdr TARGET [clear|list|(tcp|udp host_port jail_port [log ['(' logopts ')'] ] )]"
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}
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# Handle special-case commands first.
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case "$1" in
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help|-h|--help)
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usage
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;;
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esac
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if [ $# -lt 2 ]; then
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usage
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fi
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TARGET="${1}"
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JAIL_NAME=""
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JAIL_IP=""
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EXT_IF=""
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shift
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check_jail_validity() {
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# Can only redirect to single jail
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if [ "${TARGET}" = 'ALL' ]; then
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error_exit "Can only redirect to a single jail."
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fi
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# Check if jail name is valid
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JAIL_NAME=$(/usr/sbin/jls -j "${TARGET}" name 2>/dev/null)
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if [ -z "${JAIL_NAME}" ]; then
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error_exit "Jail not found: ${TARGET}"
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fi
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# Check if jail ip4 address (ip4.addr) is valid (non-VNET only)
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if [ "$(bastille config $TARGET get vnet)" != 'enabled' ]; then
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JAIL_IP=$(/usr/sbin/jls -j "${TARGET}" ip4.addr 2>/dev/null)
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if [ -z "${JAIL_IP}" -o "${JAIL_IP}" = "-" ]; then
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error_exit "Jail IP not found: ${TARGET}"
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fi
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fi
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# Check if rdr-anchor is defined in pf.conf
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if ! (pfctl -sn | grep rdr-anchor | grep 'rdr/\*' >/dev/null); then
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error_exit "rdr-anchor not found in pf.conf"
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fi
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# Check if ext_if is defined in pf.conf
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EXT_IF=$(grep '^[[:space:]]*ext_if[[:space:]]*=' /etc/pf.conf)
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if [ -z "${EXT_IF}" ]; then
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error_exit "ext_if not defined in pf.conf"
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fi
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}
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# function: write rule to rdr.conf
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persist_rdr_rule() {
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if ! grep -qs "$1 $2 $3" "${bastille_jailsdir}/${JAIL_NAME}/rdr.conf"; then
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echo "$1 $2 $3" >> "${bastille_jailsdir}/${JAIL_NAME}/rdr.conf"
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fi
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}
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persist_rdr_log_rule() {
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proto=$1;host_port=$2;jail_port=$3;
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shift 3;
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log=$@;
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if ! grep -qs "$proto $host_port $jail_port $log" "${bastille_jailsdir}/${JAIL_NAME}/rdr.conf"; then
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echo "$proto $host_port $jail_port $log" >> "${bastille_jailsdir}/${JAIL_NAME}/rdr.conf"
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fi
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}
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# function: load rdr rule via pfctl
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load_rdr_rule() {
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( pfctl -a "rdr/${JAIL_NAME}" -Psn;
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printf '%s\nrdr pass on $ext_if inet proto %s to port %s -> %s port %s\n' "$EXT_IF" "$1" "$2" "$JAIL_IP" "$3" ) \
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| pfctl -a "rdr/${JAIL_NAME}" -f-
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}
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# function: load rdr rule with log via pfctl
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load_rdr_log_rule() {
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proto=$1;host_port=$2;jail_port=$3;
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shift 3;
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log=$@
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( pfctl -a "rdr/${JAIL_NAME}" -Psn;
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printf '%s\nrdr pass %s on $ext_if inet proto %s to port %s -> %s port %s\n' "$EXT_IF" "$log" "$proto" "$host_port" "$JAIL_IP" "$jail_port" ) \
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| pfctl -a "rdr/${JAIL_NAME}" -f-
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}
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while [ $# -gt 0 ]; do
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case "$1" in
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list)
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if [ "${TARGET}" = 'ALL' ]; then
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for JAIL_NAME in $(ls "${bastille_jailsdir}" | sed "s/\n//g"); do
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echo "${JAIL_NAME} redirects:"
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pfctl -a "rdr/${JAIL_NAME}" -Psn 2>/dev/null
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done
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else
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check_jail_validity
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pfctl -a "rdr/${JAIL_NAME}" -Psn 2>/dev/null
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fi
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shift
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;;
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clear)
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if [ "${TARGET}" = 'ALL' ]; then
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for JAIL_NAME in $(ls "${bastille_jailsdir}" | sed "s/\n//g"); do
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echo "${JAIL_NAME} redirects:"
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pfctl -a "rdr/${JAIL_NAME}" -Fn
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done
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else
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check_jail_validity
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pfctl -a "rdr/${JAIL_NAME}" -Fn
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fi
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shift
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;;
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tcp|udp)
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if [ $# -lt 3 ]; then
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usage
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elif [ $# -eq 3 ]; then
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check_jail_validity
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persist_rdr_rule $1 $2 $3
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load_rdr_rule $1 $2 $3
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shift 3
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else
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case "$4" in
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log)
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proto=$1
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host_port=$2
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jail_port=$3
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shift 3
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if [ $# -gt 3 ]; then
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for last in $@; do
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true
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done
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if [ $2 == "(" ] && [ $last == ")" ] ; then
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check_jail_validity
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persist_rdr_log_rule $proto $host_port $jail_port $@
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load_rdr_log_rule $proto $host_port $jail_port $@
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shift $#
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else
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usage
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fi
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elif [ $# -eq 1 ]; then
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check_jail_validity
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persist_rdr_log_rule $proto $host_port $jail_port $@
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load_rdr_log_rule $proto $host_port $jail_port $@
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shift 1
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else
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usage
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fi
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;;
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*)
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usage
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;;
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esac
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fi
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;;
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*)
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usage
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;;
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esac
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done
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