2 # Begin $rc_base/init.d/unbound
4 # Description : Unbound DNS resolver boot script for IPfire
5 # Author : Marcel Lorenz <marcel.lorenz@ipfire.org>
10 TEST_DOMAIN
="ipfire.org"
12 # This domain will never validate
13 TEST_DOMAIN_FAIL
="dnssec-failed.org"
17 # Cache any local zones for 60 seconds
20 # Load optional configuration
21 [ -e "/etc/sysconfig/unbound" ] && .
/etc
/sysconfig
/unbound
25 IFS
=.
read -r i1 i2 i3 i4
<<< ${1}
26 IFS
=.
read -r m1 m2 m3
m4 <<< ${2}
27 cidr
=$
(printf "%d.%d.%d.%d\n" "$((i1 & m1))" "$((i2 & m2))" "$((i3 & m3))" "$((i4 & m4))")
41 *) echo "Error: $dec is not recognised"; exit 1
44 echo "${cidr}/${nbits}"
51 IFS
=.
read -r a1 a2 a3 a4
<<< ${addr}
53 echo "${a4}.${a3}.${a2}.${a1}.in-addr.arpa"
59 echo "$(</var/ipfire/red/dns${i})"
64 echo "# This file is automatically generated and any changes"
65 echo "# will be overwritten. DO NOT EDIT!"
70 if [ "${USE_FORWARDERS}" = "1" -a -e "/var/ipfire/red/active" ]; then
72 local broken_forwarders
75 for ns
in $
(read_name_servers
); do
76 test_name_server
${ns} &>/dev
/null
78 # Only use DNSSEC-validating or DNSSEC-aware name servers
80 forwarders
="${forwarders} ${ns}"
83 broken_forwarders
="${broken_forwarders} ${ns}"
88 # Show warning for any broken upstream name servers
89 if [ -n "${broken_forwarders}" ]; then
90 boot_mesg
"Ignoring broken upstream name server(s): ${broken_forwarders:1}" ${WARNING}
94 if [ -n "${broken_forwarders}" -a -z "${forwarders}" ]; then
95 boot_mesg
"Falling back to recursor mode" ${WARNING}
98 elif [ -n "${forwarders}" ]; then
99 boot_mesg
"Configuring upstream name server(s): ${forwarders:1}" ${INFO}
102 echo "${forwarders}" > /var
/ipfire
/red
/dns
103 unbound-control
-q forward
${forwarders}
108 # If forwarders cannot be used we run in recursor mode
109 echo "local recursor" > /var
/ipfire
/red
/dns
110 unbound-control
-q forward off
114 local hostname
=$
(hostname
-f)
115 # 1.1.1.1 is reserved for unused green, skip this
116 if [ -n "${GREEN_ADDRESS}" -a "${GREEN_ADDRESS}" != "1.1.1.1" ]; then
117 unbound-control
-q local_data
"${hostname} ${LOCAL_TTL} IN A ${GREEN_ADDRESS}"
121 for address
in ${GREEN_ADDRESS} ${BLUE_ADDRESS} ${ORANGE_ADDRESS}; do
122 [ -n "${address}" ] ||
continue
123 [ "${address}" = "1.1.1.1" ] && continue
125 address
=$
(ip_address_revptr
${address})
126 unbound-control
-q local_data
"${address} ${LOCAL_TTL} IN PTR ${hostname}"
131 local enabled address hostname domainname
133 while IFS
="," read -r enabled address hostname domainname
; do
134 [ "${enabled}" = "on" ] ||
continue
137 local fqdn
="${hostname}.${domainname}"
139 unbound-control
-q local_data
"${fqdn} ${LOCAL_TTL} IN A ${address}"
141 # Skip reverse resolution if the address equals the GREEN address
142 [ "${address}" = "${GREEN_ADDRESS}" ] && continue
145 address
=$
(ip_address_revptr
${address})
146 unbound-control
-q local_data
"${address} ${LOCAL_TTL} IN PTR ${fqdn}"
147 done < /var
/ipfire
/main
/hosts
150 write_interfaces_conf
() {
154 # 1.1.1.1 is reserved for unused green
155 if [ -n "${GREEN_ADDRESS}" -a "${GREEN_ADDRESS}" != "1.1.1.1" ]; then
156 echo "# allow access from GREEN"
157 echo "access-control: $(cidr ${GREEN_NETADDRESS} ${GREEN_NETMASK}) allow"
160 if [ -n "${BLUE_ADDRESS}" ]; then
161 echo "# allow access from BLUE"
162 echo "access-control: $(cidr ${BLUE_NETADDRESS} ${BLUE_NETMASK}) allow"
164 ) > /etc
/unbound
/interfaces.conf
167 write_forward_conf
() {
173 local enabled zone server remark
174 while IFS
="," read -r enabled zone server remark
; do
175 # Line must be enabled.
176 [ "${enabled}" = "on" ] ||
continue
178 # Zones that end with .local are commonly used for internal
179 # zones and therefore not signed
182 insecure_zones
="${insecure_zones} ${zone}"
187 echo " name: ${zone}"
188 echo " forward-addr: ${server}"
190 done < /var
/ipfire
/dnsforward
/config
192 if [ -n "${insecure_zones}" ]; then
195 for zone
in ${insecure_zones}; do
196 echo " domain-insecure: ${zone}"
199 ) > /etc
/unbound
/forward.conf
202 write_tuning_conf
() {
203 # https://www.unbound.net/documentation/howto_optimise.html
205 # Determine number of online processors
206 local processors
=$
(getconf _NPROCESSORS_ONLN
)
208 # Determine number of slabs
210 while [ ${slabs} -lt ${processors} ]; do
211 slabs
=$
(( ${slabs} * 2 ))
214 # Determine amount of system memory
215 local mem
=$
(get_memory_amount
)
217 # In the worst case scenario, unbound can use double the
218 # amount of memory allocated to a cache due to malloc overhead
220 # Large systems with more than 2GB of RAM
221 if [ ${mem} -ge 2048 ]; then
224 # Small systems with less than 256MB of RAM
225 elif [ ${mem} -le 256 ]; then
236 # We run one thread per processor
237 echo "num-threads: ${processors}"
239 # Adjust number of slabs
240 echo "infra-cache-slabs: ${slabs}"
241 echo "key-cache-slabs: ${slabs}"
242 echo "msg-cache-slabs: ${slabs}"
243 echo "rrset-cache-slabs: ${slabs}"
246 echo "rrset-cache-size: $(( ${mem} / 2 ))m"
247 echo "msg-cache-size: $(( ${mem} / 4 ))m"
248 echo "key-cache-size: $(( ${mem} / 4 ))m"
249 ) > /etc
/unbound
/tuning.conf
252 get_memory_amount
() {
255 while read -r key val unit
; do
259 echo "$(( ${val} / 1024 ))"
270 # 0 DNSSEC validating
271 # 1 Error: unreachable, etc.
275 # Exit when the server is not reachable
276 ns_is_online
${ns} ||
return 1
278 # Return 0 if validating
279 ns_is_validating
${ns} && return 0
282 for rr
in DNSKEY DS RRSIG
; do
283 if ! ns_forwards_
${rr} ${ns}; then
284 errors
="${errors} ${rr}"
288 if [ -n "${errors}" ]; then
289 echo >&2 "Unable to retrieve the following resource records from ${ns}: ${errors:1}"
297 # Sends an A query to the nameserver w/o DNSSEC
301 dig @
${ns} +nodnssec A
${TEST_DOMAIN} >/dev
/null
304 # Resolving ${TEST_DOMAIN_FAIL} will fail if the nameserver is validating
308 dig @
${ns} A
${TEST_DOMAIN_FAIL} |
grep -q SERVFAIL
311 # Checks if we can retrieve the DNSKEY for this domain.
312 # dig will print the SOA if nothing was found
313 ns_forwards_DNSKEY
() {
316 dig @
${ns} DNSKEY
${TEST_DOMAIN} |
grep -qv SOA
322 dig @
${ns} DS
${TEST_DOMAIN} |
grep -qv SOA
325 ns_forwards_RRSIG
() {
328 dig @
${ns} +dnssec A
${TEST_DOMAIN} |
grep -q RRSIG
334 dig @
${ns} +tcp A
${TEST_DOMAIN} >/dev
/null ||
return 1
339 # Print a nicer messagen when unbound is already running
340 if pidofproc
-s unbound
; then
341 statusproc
/usr
/sbin
/unbound
345 eval $
(/usr
/local
/bin
/readhash
/var
/ipfire
/ethernet
/settings
)
347 # Create control keys at first run
348 if [ ! -r "/etc/unbound/unbound_control.key" ]; then
349 unbound-control-setup
-d /etc
/unbound
&>/dev
/null
352 # Update configuration files
354 write_interfaces_conf
357 boot_mesg
"Starting Unbound DNS Proxy..."
358 loadproc
/usr
/sbin
/unbound ||
exit $?
360 # Make own hostname resolveable
363 # Update any known forwarding name servers
371 boot_mesg
"Stopping Unbound DNS Proxy..."
372 killproc
/usr
/sbin
/unbound
382 statusproc
/usr
/sbin
/unbound
392 test_name_server
${ns}
397 echo "${ns} is validating"
400 echo "${ns} is DNSSEC-aware"
403 echo "${ns} is NOT DNSSEC-aware"
406 echo "Test failed for an unknown reason"
410 if ns_supports_tcp
${ns}; then
411 echo "${ns} supports TCP fallback"
413 echo "${ns} does not support TCP fallback"
420 echo "Usage: $0 {start|stop|restart|status|update-forwarders|test-name-server}"
425 # End $rc_base/init.d/unbound