You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
608 lines
15 KiB
608 lines
15 KiB
#!/bin/sh
|
|
##############################################################################
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License version 2 as
|
|
# published by the Free Software Foundation.
|
|
#
|
|
# 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.
|
|
#
|
|
# Copyright (C) 2016 Eric Luehrsen
|
|
#
|
|
##############################################################################
|
|
#
|
|
# This builds the basic UCI components currently supported for Unbound. It is
|
|
# intentionally NOT comprehensive and bundles a lot of options. The UCI is to
|
|
# be a simpler presentation of the total Unbound conf set.
|
|
#
|
|
##############################################################################
|
|
|
|
UNBOUND_B_CONTROL=0
|
|
UNBOUND_B_DNSMASQ=0
|
|
UNBOUND_B_DNSSEC=0
|
|
UNBOUND_B_DNS64=0
|
|
UNBOUND_B_GATE_NAME=0
|
|
UNBOUND_B_HIDE_BIND=1
|
|
UNBOUND_B_LOCL_BLCK=0
|
|
UNBOUND_B_LOCL_NAME=0
|
|
UNBOUND_B_LOCL_SERV=1
|
|
UNBOUND_B_MAN_CONF=0
|
|
UNBOUND_B_NTP_BOOT=1
|
|
UNBOUND_B_PRIV_BLCK=1
|
|
UNBOUND_B_QUERY_MIN=0
|
|
UNBOUND_B_QRY_MINST=0
|
|
|
|
UNBOUND_IP_DNS64="64:ff9b::/96"
|
|
|
|
UNBOUND_D_RESOURCE=small
|
|
UNBOUND_D_RECURSION=passive
|
|
UNBOUND_D_PROTOCOL=mixed
|
|
|
|
UNBOUND_TXT_FWD_ZONE=""
|
|
UNBOUND_TTL_MIN=120
|
|
|
|
UNBOUND_N_EDNS_SIZE=1280
|
|
UNBOUND_N_FWD_PORTS=""
|
|
UNBOUND_N_RX_PORT=53
|
|
UNBOUND_N_ROOT_AGE=28
|
|
|
|
##############################################################################
|
|
|
|
UNBOUND_ANCHOR=/usr/bin/unbound-anchor
|
|
UNBOUND_CONTROL=/usr/bin/unbound-control
|
|
|
|
UNBOUND_LIBDIR=/usr/lib/unbound
|
|
|
|
UNBOUND_PIDFILE=/var/run/unbound.pid
|
|
|
|
UNBOUND_VARDIR=/var/lib/unbound
|
|
UNBOUND_CONFFILE=$UNBOUND_VARDIR/unbound.conf
|
|
UNBOUND_KEYFILE=$UNBOUND_VARDIR/root.key
|
|
UNBOUND_HINTFILE=$UNBOUND_VARDIR/root.hints
|
|
UNBOUND_TIMEFILE=$UNBOUND_VARDIR/unbound.time
|
|
UNBOUND_CHECKFILE=$UNBOUND_VARDIR/unbound.check
|
|
|
|
##############################################################################
|
|
|
|
. /lib/functions.sh
|
|
. /lib/functions/network.sh
|
|
|
|
. $UNBOUND_LIBDIR/dnsmasq.sh
|
|
. $UNBOUND_LIBDIR/iptools.sh
|
|
. $UNBOUND_LIBDIR/rootzone.sh
|
|
|
|
##############################################################################
|
|
|
|
create_access_control() {
|
|
local cfg="$1"
|
|
local subnets subnets4 subnets6
|
|
local validip4 validip6
|
|
|
|
network_get_subnets subnets4 "$cfg"
|
|
network_get_subnets6 subnets6 "$cfg"
|
|
subnets="$subnets4 $subnets6"
|
|
|
|
|
|
if [ -n "$subnets" ] ; then
|
|
for subnet in $subnets ; do
|
|
validip4=$( valid_subnet4 $subnet )
|
|
validip6=$( valid_subnet6 $subnet )
|
|
|
|
|
|
if [ "$validip4" = "ok" -o "$validip6" = "ok" ] ; then
|
|
# For each "network" UCI add "access-control:" white list for queries
|
|
echo " access-control: $subnet allow" >> $UNBOUND_CONFFILE
|
|
fi
|
|
done
|
|
fi
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
create_domain_insecure() {
|
|
echo " domain-insecure: \"$1\"" >> $UNBOUND_CONFFILE
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_mkdir() {
|
|
mkdir -p $UNBOUND_VARDIR
|
|
touch $UNBOUND_CONFFILE
|
|
|
|
|
|
if [ -f /etc/unbound/root.hints ] ; then
|
|
# Your own local copy of root.hints
|
|
cp -p /etc/unbound/root.hints $UNBOUND_HINTFILE
|
|
|
|
elif [ -f /usr/share/dns/root.hints ] ; then
|
|
# Debian-like package dns-root-data
|
|
cp -p /usr/share/dns/root.hints $UNBOUND_HINTFILE
|
|
|
|
else
|
|
logger -t unbound -s "iterator will use built-in root hints"
|
|
fi
|
|
|
|
|
|
if [ -f /etc/unbound/root.key ] ; then
|
|
# Your own local copy of a root.key
|
|
cp -p /etc/unbound/root.key $UNBOUND_KEYFILE
|
|
|
|
elif [ -f /usr/share/dns/root.key ] ; then
|
|
# Debian-like package dns-root-data
|
|
cp -p /usr/share/dns/root.key $UNBOUND_KEYFILE
|
|
|
|
elif [ -x "$UNBOUND_ANCHOR" ] ; then
|
|
$UNBOUND_ANCHOR -a $UNBOUND_KEYFILE
|
|
|
|
else
|
|
logger -t unbound -s "validator will use built-in trust anchor"
|
|
fi
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_conf() {
|
|
local cfg=$1
|
|
local rt_mem rt_conn modulestring
|
|
|
|
{
|
|
# Make fresh conf file
|
|
echo "# $UNBOUND_CONFFILE generated by UCI $( date )"
|
|
echo
|
|
} > $UNBOUND_CONFFILE
|
|
|
|
|
|
if [ "$UNBOUND_B_CONTROL" -gt 0 ] ; then
|
|
{
|
|
# Enable remote control tool, but only at local host for security
|
|
echo "remote-control:"
|
|
echo " control-enable: yes"
|
|
echo " control-use-cert: no"
|
|
echo " control-interface: 127.0.0.1"
|
|
echo " control-interface: ::1"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
else
|
|
{
|
|
# "control:" clause is seperate before "server:" so we can append
|
|
# dnsmasq "server:" parts and "forward:" cluases towards the end.
|
|
echo "remote-control:"
|
|
echo " control-enable: no"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
{
|
|
# No threading
|
|
echo "server:"
|
|
echo " username: unbound"
|
|
echo " num-threads: 1"
|
|
echo " msg-cache-slabs: 1"
|
|
echo " rrset-cache-slabs: 1"
|
|
echo " infra-cache-slabs: 1"
|
|
echo " key-cache-slabs: 1"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
{
|
|
# Logging
|
|
echo " verbosity: 1"
|
|
echo " statistics-interval: 0"
|
|
echo " statistics-cumulative: no"
|
|
echo " extended-statistics: no"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
{
|
|
# Interfaces (access contol "option local_service")
|
|
echo " interface: 0.0.0.0"
|
|
echo " interface: ::0"
|
|
echo " outgoing-interface: 0.0.0.0"
|
|
echo " outgoing-interface: ::0"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
case "$UNBOUND_D_PROTOCOL" in
|
|
ip4_only)
|
|
{
|
|
echo " do-ip4: yes"
|
|
echo " do-ip6: no"
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
ip6_only)
|
|
{
|
|
echo " do-ip4: no"
|
|
echo " do-ip6: yes"
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
ip6_prefer)
|
|
{
|
|
echo " do-ip4: yes"
|
|
echo " do-ip6: yes"
|
|
echo " prefer-ip6: yes"
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
*)
|
|
{
|
|
echo " do-ip4: yes"
|
|
echo " do-ip6: yes"
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
esac
|
|
|
|
|
|
{
|
|
# protocol level tuning
|
|
echo " edns-buffer-size: $UNBOUND_N_EDNS_SIZE"
|
|
echo " msg-buffer-size: 8192"
|
|
echo " port: $UNBOUND_N_RX_PORT"
|
|
echo " outgoing-port-permit: 10240-65535"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
{
|
|
# Other harding and options for an embedded router
|
|
echo " harden-short-bufsize: yes"
|
|
echo " harden-large-queries: yes"
|
|
echo " harden-glue: yes"
|
|
echo " harden-below-nxdomain: no"
|
|
echo " harden-referral-path: no"
|
|
echo " use-caps-for-id: no"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
{
|
|
# Default Files
|
|
echo " use-syslog: yes"
|
|
echo " chroot: \"$UNBOUND_VARDIR\""
|
|
echo " directory: \"$UNBOUND_VARDIR\""
|
|
echo " pidfile: \"$UNBOUND_PIDFILE\""
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
if [ -f "$UNBOUND_HINTFILE" ] ; then
|
|
# Optional hints if found
|
|
echo " root-hints: \"$UNBOUND_HINTFILE\"" >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_B_DNSSEC" -gt 0 -a -f "$UNBOUND_KEYFILE" ] ; then
|
|
{
|
|
echo " auto-trust-anchor-file: \"$UNBOUND_KEYFILE\""
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
else
|
|
echo >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
case "$UNBOUND_D_RESOURCE" in
|
|
# Tiny - Unbound's recommended cheap hardware config
|
|
tiny) rt_mem=1 ; rt_conn=1 ;;
|
|
# Small - Half RRCACHE and open ports
|
|
small) rt_mem=8 ; rt_conn=5 ;;
|
|
# Medium - Nearly default but with some added balancintg
|
|
medium) rt_mem=16 ; rt_conn=10 ;;
|
|
# Large - Double medium
|
|
large) rt_mem=32 ; rt_conn=10 ;;
|
|
# Whatever unbound does
|
|
*) rt_mem=0 ; rt_conn=0 ;;
|
|
esac
|
|
|
|
|
|
if [ "$rt_mem" -gt 0 ] ; then
|
|
{
|
|
# Set memory sizing parameters
|
|
echo " outgoing-range: $(($rt_conn*64))"
|
|
echo " num-queries-per-thread: $(($rt_conn*32))"
|
|
echo " outgoing-num-tcp: $(($rt_conn))"
|
|
echo " incoming-num-tcp: $(($rt_conn))"
|
|
echo " rrset-cache-size: $(($rt_mem*256))k"
|
|
echo " msg-cache-size: $(($rt_mem*128))k"
|
|
echo " key-cache-size: $(($rt_mem*128))k"
|
|
echo " neg-cache-size: $(($rt_mem*64))k"
|
|
echo " infra-cache-numhosts: $(($rt_mem*256))"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
else
|
|
logger -t unbound -s "default memory resource consumption"
|
|
fi
|
|
|
|
# Assembly of module-config: options is tricky; order matters
|
|
modulestring="iterator"
|
|
|
|
|
|
if [ "$UNBOUND_B_DNSSEC" -gt 0 ] ; then
|
|
if [ ! -f "$UNBOUND_TIMEFILE" -a "$UNBOUND_B_NTP_BOOT" -gt 0 ] ; then
|
|
# DNSSEC chicken and egg with getting NTP time
|
|
echo " val-override-date: -1" >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
{
|
|
echo " harden-dnssec-stripped: yes"
|
|
echo " val-clean-additional: yes"
|
|
echo " ignore-cd-flag: yes"
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
modulestring="validator $modulestring"
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_B_DNS64" -gt 0 ] ; then
|
|
echo " dns64-prefix: $UNBOUND_IP_DNS64" >> $UNBOUND_CONFFILE
|
|
|
|
modulestring="dns64 $modulestring"
|
|
fi
|
|
|
|
|
|
{
|
|
# Print final module string
|
|
echo " module-config: \"$modulestring\""
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
if [ "$UNBOUND_B_QRY_MINST" -gt 0 -a "$UNBOUND_B_QUERY_MIN" -gt 0 ] ; then
|
|
{
|
|
# Some query privacy but "strict" will break some name servers
|
|
echo " qname-minimisation: yes"
|
|
echo " qname-minimisation-strict: yes"
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
elif [ "$UNBOUND_B_QUERY_MIN" -gt 0 ] ; then
|
|
# Minor improvement on query privacy
|
|
echo " qname-minimisation: yes" >> $UNBOUND_CONFFILE
|
|
|
|
else
|
|
echo " qname-minimisation: no" >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
case "$UNBOUND_D_RECURSION" in
|
|
passive)
|
|
{
|
|
echo " prefetch: no"
|
|
echo " prefetch-key: no"
|
|
echo " target-fetch-policy: \"0 0 0 0 0\""
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
aggressive)
|
|
{
|
|
echo " prefetch: yes"
|
|
echo " prefetch-key: yes"
|
|
echo " target-fetch-policy: \"3 2 1 0 0\""
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
;;
|
|
|
|
*)
|
|
logger -t unbound -s "default recursion configuration"
|
|
;;
|
|
esac
|
|
|
|
|
|
{
|
|
# Reload records more than 10 hours old
|
|
# DNSSEC 5 minute bogus cool down before retry
|
|
# Adaptive infrastructure info kept for 15 minutes
|
|
echo " cache-min-ttl: $UNBOUND_TTL_MIN"
|
|
echo " cache-max-ttl: 36000"
|
|
echo " val-bogus-ttl: 300"
|
|
echo " infra-host-ttl: 900"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
|
|
if [ "$UNBOUND_B_HIDE_BIND" -gt 0 ] ; then
|
|
{
|
|
# Block server id and version DNS TXT records
|
|
echo " hide-identity: yes"
|
|
echo " hide-version: yes"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_B_PRIV_BLCK" -gt 0 ] ; then
|
|
{
|
|
# Remove _upstream_ or global reponses with private addresses.
|
|
# Unbounds own "local zone" and "forward zone" may still use these.
|
|
# RFC1918, RFC3927, RFC4291, RFC6598, RFC6890
|
|
echo " private-address: 10.0.0.0/8"
|
|
echo " private-address: 100.64.0.0/10"
|
|
echo " private-address: 169.254.0.0/16"
|
|
echo " private-address: 172.16.0.0/12"
|
|
echo " private-address: 192.168.0.0/16"
|
|
echo " private-address: fc00::/8"
|
|
echo " private-address: fd00::/8"
|
|
echo " private-address: fe80::/10"
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_B_LOCL_BLCK" -gt 0 ] ; then
|
|
{
|
|
# Remove DNS reponses from upstream with loopback IP
|
|
# Black hole DNS method for ad blocking, so consider...
|
|
echo " private-address: 127.0.0.0/8"
|
|
echo " private-address: ::1/128"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
else
|
|
echo >> $UNBOUND_CONFFILE
|
|
fi
|
|
|
|
|
|
# Domain Exceptions
|
|
config_list_foreach "$cfg" "domain_insecure" create_domain_insecure
|
|
echo >> $UNBOUND_CONFFILE
|
|
|
|
|
|
####################
|
|
# UCI @ network #
|
|
####################
|
|
|
|
|
|
if [ "$UNBOUND_B_LOCL_SERV" -gt 0 ] ; then
|
|
# Only respond to queries from which this device has an interface.
|
|
# Prevent DNS amplification attacks by not responding to the universe.
|
|
config_load network
|
|
config_foreach create_access_control interface
|
|
|
|
{
|
|
echo " access-control: 127.0.0.0/8 allow"
|
|
echo " access-control: ::1/128 allow"
|
|
echo " access-control: fe80::/10 allow"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
|
|
else
|
|
{
|
|
echo " access-control: 0.0.0.0/0 allow"
|
|
echo " access-control: ::0/0 allow"
|
|
echo
|
|
} >> $UNBOUND_CONFFILE
|
|
fi
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_uci() {
|
|
local cfg=$1
|
|
local dnsmasqpath
|
|
|
|
####################
|
|
# UCI @ unbound #
|
|
####################
|
|
|
|
config_get_bool UNBOUND_B_DNS64 "$cfg" dns64 0
|
|
config_get_bool UNBOUND_B_GATE_NAME "$cfg" dnsmasq_gate_name 0
|
|
config_get_bool UNBOUND_B_DNSMASQ "$cfg" dnsmasq_link_dns 0
|
|
config_get_bool UNBOUND_B_HIDE_BIND "$cfg" hide_binddata 1
|
|
config_get_bool UNBOUND_B_LOCL_NAME "$cfg" dnsmasq_only_local 0
|
|
config_get_bool UNBOUND_B_LOCL_SERV "$cfg" localservice 1
|
|
config_get_bool UNBOUND_B_MAN_CONF "$cfg" manual_conf 0
|
|
config_get_bool UNBOUND_B_QUERY_MIN "$cfg" query_minimize 0
|
|
config_get_bool UNBOUND_B_QRY_MINST "$cfg" query_min_strict 0
|
|
config_get_bool UNBOUND_B_PRIV_BLCK "$cfg" rebind_protection 1
|
|
config_get_bool UNBOUND_B_LOCL_BLCK "$cfg" rebind_localhost 0
|
|
config_get_bool UNBOUND_B_CONTROL "$cfg" unbound_control 0
|
|
config_get_bool UNBOUND_B_DNSSEC "$cfg" validator 0
|
|
config_get_bool UNBOUND_B_NTP_BOOT "$cfg" validator_ntp 1
|
|
|
|
config_get UNBOUND_IP_DNS64 "$cfg" dns64_prefix "64:ff9b::/96"
|
|
|
|
config_get UNBOUND_N_EDNS_SIZE "$cfg" edns_size 1280
|
|
config_get UNBOUND_N_RX_PORT "$cfg" listen_port 53
|
|
config_get UNBOUND_N_ROOT_AGE "$cfg" root_age 7
|
|
|
|
config_get UNBOUND_D_PROTOCOL "$cfg" protocol mixed
|
|
config_get UNBOUND_D_RECURSION "$cfg" recursion passive
|
|
config_get UNBOUND_D_RESOURCE "$cfg" resource small
|
|
|
|
config_get UNBOUND_TTL_MIN "$cfg" ttl_min 120
|
|
|
|
|
|
if [ "$UNBOUND_B_DNSMASQ" -gt 0 ] ; then
|
|
dnsmasqpath=$( which dnsmasq )
|
|
|
|
|
|
if [ ! -x "$dnsmasqpath" ] ; then
|
|
logger -t unbound -s "cannot forward to dnsmasq"
|
|
UNBOUND_B_DNSMASQ=0
|
|
fi
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_N_EDNS_SIZE" -lt 512 \
|
|
-o 4096 -lt "$UNBOUND_N_EDNS_SIZE" ] ; then
|
|
# exceeds range, back to default
|
|
UNBOUND_N_EDNS_SIZE=1280
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_N_RX_PORT" -lt 1024 \
|
|
-o 10240 -lt "$UNBOUND_N_RX_PORT" ] ; then
|
|
# special port or in 5 digits, back to default
|
|
UNBOUND_N_RX_PORT=53
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_TTL_MIN" -gt 1800 ] ; then
|
|
# that could have had awful side effects
|
|
UNBOUND_TTL_MIN=300
|
|
fi
|
|
|
|
|
|
if [ "$UNBOUND_B_MAN_CONF" -gt 0 ] ; then
|
|
# Don't want this being triggered. Maybe we could, but then the
|
|
# base conf you provide would need to be just right.
|
|
UNBOUND_B_DNSMASQ=0
|
|
|
|
else
|
|
unbound_conf $cfg
|
|
fi
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_own () {
|
|
# Debug UCI
|
|
{
|
|
echo "# $UNBOUND_CHECKFILE generated by UCI $( date )"
|
|
echo
|
|
set | grep ^UNBOUND_
|
|
} > $UNBOUND_CHECKFILE
|
|
|
|
|
|
if [ "$UNBOUND_B_MAN_CONF" -gt 0 ] ; then
|
|
# You are doing your own thing, so just copy /etc/ to /var/
|
|
cp -p /etc/unbound/* $UNBOUND_VARDIR/
|
|
fi
|
|
|
|
|
|
# Ensure access and prepare to jail
|
|
chown -R unbound:unbound $UNBOUND_VARDIR
|
|
chmod 775 $UNBOUND_VARDIR
|
|
chmod 664 $UNBOUND_VARDIR/*
|
|
}
|
|
|
|
##############################################################################
|
|
|
|
unbound_prepare() {
|
|
# Make a home for Unbound in /var/lib/unbound
|
|
unbound_mkdir
|
|
|
|
# Load up the chunks of UCI
|
|
config_load unbound
|
|
config_foreach unbound_uci unbound
|
|
|
|
# Unbound primary DNS, and dnsmasq side service DHCP-DNS (dnsmasq.sh)
|
|
dnsmasq_link
|
|
|
|
# Unbound needs chroot ownership
|
|
unbound_own
|
|
}
|
|
|
|
##############################################################################
|
|
|