# This domain will never validate
TEST_DOMAIN_FAIL="dnssec-failed.org"
-INSECURE_ZONES=
-USE_FORWARDERS=1
-ENABLE_SAFE_SEARCH=off
-FORCE_TCP=off
-
# Cache any local zones for 60 seconds
LOCAL_TTL=60
-# EDNS buffer size
-EDNS_DEFAULT_BUFFER_SIZE=4096
-
-# Load optional configuration
-[ -e "/etc/sysconfig/unbound" ] && . /etc/sysconfig/unbound
-
-DIG_ARGS=()
-
-if [ "${FORCE_TCP}" = "on" ]; then
- DIG_ARGS+=( "+tcp" )
-fi
+# Load configuration
+eval $(/usr/local/bin/readhash /var/ipfire/dns/settings)
+eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
ip_address_revptr() {
local addr=${1}
}
read_name_servers() {
- local i
- for i in 1 2; do
- echo "$(</var/ipfire/red/dns${i})"
- done 2>/dev/null | xargs echo
-}
-
-check_red_has_carrier_and_ip() {
- # Interface configured ?
- [ ! -e "/var/ipfire/red/iface" ] && return 0;
-
- # Interface present ?
- [ ! -e "/sys/class/net/$(</var/ipfire/red/iface)" ] && return 0;
-
- # has carrier ?
- [ ! "$(</sys/class/net/$(</var/ipfire/red/iface)/carrier)" = "1" ] && return 0;
+ # Read name servers from ISP
+ if [ "${USE_ISP_NAMESERVERS}" = "on" -a "${PROTO}" != "TLS" ]; then
+ local i
+ for i in 1 2; do
+ echo "$(</var/run/dns${i})"
+ done 2>/dev/null
+ fi
- # has ip ?
- [ "$(ip address show dev $(</var/ipfire/red/iface) | grep "inet")" = "" ] && return 0;
+ # Read configured name servers
+ local id address tls_hostname enabled remark
+ while IFS="," read -r id address tls_hostname enabled remark; do
+ [ "${enabled}" != "enabled" ] && continue
- return 1;
+ if [ "${PROTO}" = "TLS" ]; then
+ if [ -n "${tls_hostname}" ]; then
+ echo "${address}@853#${tls_hostname}"
+ fi
+ else
+ echo "${address}"
+ fi
+ done < /var/ipfire/dns/servers
}
config_header() {
echo
}
-update_forwarders() {
- check_red_has_carrier_and_ip
- if [ "${USE_FORWARDERS}" = "1" -a "${?}" = "1" ]; then
- local forwarders
- local broken_forwarders
-
- local ns
- for ns in $(read_name_servers); do
- test_name_server ${ns} &>/dev/null
- case "$?" in
- # Only use DNSSEC-validating or DNSSEC-aware name servers
- 0|2)
- forwarders="${forwarders} ${ns}"
- ;;
- *)
- broken_forwarders="${broken_forwarders} ${ns}"
- ;;
- esac
- done
-
- # Determine EDNS buffer size
- local new_edns_buffer_size=${EDNS_DEFAULT_BUFFER_SIZE}
-
- for ns in ${forwarders}; do
- local edns_buffer_size=$(ns_determine_edns_buffer_size ${ns})
- if [ -n "${edns_buffer_size}" ]; then
- if [ ${edns_buffer_size} -lt ${new_edns_buffer_size} ]; then
- new_edns_buffer_size=${edns_buffer_size}
- fi
- fi
- done
-
- if [ ${new_edns_buffer_size} -lt ${EDNS_DEFAULT_BUFFER_SIZE} ]; then
- boot_mesg "EDNS buffer size reduced to ${new_edns_buffer_size}" ${WARNING}
- echo_warning
-
- unbound-control -q set_option edns-buffer-size: ${new_edns_buffer_size}
- fi
-
- # Show warning for any broken upstream name servers
- if [ -n "${broken_forwarders}" ]; then
- boot_mesg "Ignoring broken upstream name server(s): ${broken_forwarders:1}" ${WARNING}
- echo_warning
- fi
-
- if [ -n "${forwarders}" ]; then
- boot_mesg "Configuring upstream name server(s): ${forwarders:1}" ${INFO}
- echo_ok
-
- # Make sure DNSSEC is activated
- enable_dnssec
-
- echo "${forwarders}" > /var/ipfire/red/dns
- unbound-control -q forward ${forwarders}
- return 0
-
- # In case we have found no working forwarders
- else
- # Test if the recursor mode is available
- if can_resolve_root +bufsize=${new_edns_buffer_size}; then
- # Make sure DNSSEC is activated
- enable_dnssec
-
- boot_mesg "Falling back to recursor mode" ${WARNING}
- echo_warning
-
- # If not, we set DNSSEC in permissive mode and allow using all recursors
- elif [ -n "${broken_forwarders}" ]; then
- disable_dnssec
-
- boot_mesg "DNSSEC has been set to permissive mode" ${FAILURE}
- echo_failure
-
- echo "${broken_forwarders}" > /var/ipfire/red/dns
- unbound-control -q forward ${broken_forwarders}
- return 0
- fi
- fi
- fi
-
- # If forwarders cannot be used we run in recursor mode
- echo "local recursor" > /var/ipfire/red/dns
- unbound-control -q forward off
-}
-
-remove_forwarders() {
- enable_dnssec
- echo "local recursor" > /var/ipfire/red/dns
- unbound-control -q forward off
-
-}
-
own_hostname() {
local hostname=$(hostname -f)
# 1.1.1.1 is reserved for unused green, skip this
}
update_hosts() {
+ # Make own hostname resolveable
+ own_hostname
+
local enabled address hostname domainname generateptr
while IFS="," read -r enabled address hostname domainname generateptr; do
(
config_header
+ # Enable strict QNAME minimisation
+ if [ "${QNAME_MIN}" = "strict" ]; then
+ echo "server:"
+ echo " qname-minimisation-strict: yes"
+ echo
+ fi
+
# Force using TCP for upstream servers only
- if [ "${FORCE_TCP}" = "on" ]; then
+ if [ "${PROTO}" = "TCP" ]; then
echo "# Force using TCP for upstream servers only"
echo "server:"
echo " tcp-upstream: yes"
echo
fi
- local insecure_zones="${INSECURE_ZONES}"
+ local insecure_zones=""
local enabled zone server servers remark disable_dnssec rest
while IFS="," read -r enabled zone servers remark disable_dnssec rest; do
;;
esac
- # Reverse-lookup zones must be stubs
+ echo "stub-zone:"
+ echo " name: ${zone}"
+ for server in ${servers//|/ }; do
+ if [[ ${server} =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+ echo " stub-addr: ${server}"
+ else
+ echo " stub-host: ${server}"
+ fi
+ done
+ echo
+
+ # Make all reverse lookup zones transparent
case "${zone}" in
*.in-addr.arpa)
- echo "stub-zone:"
- echo " name: ${zone}"
- for server in ${servers//|/ }; do
- if [[ ${server} =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
- echo " stub-addr: ${server}"
- else
- echo " stub-host: ${server}"
- fi
- done
- echo
echo "server:"
echo " local-zone: \"${zone}\" transparent"
echo
;;
- *)
- echo "forward-zone:"
- echo " name: ${zone}"
- for server in ${servers//|/ }; do
- if [[ ${server} =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
- echo " forward-addr: ${server}"
- else
- echo " forward-host: ${server}"
- fi
- done
- echo
- ;;
esac
done < /var/ipfire/dnsforward/config
echo " domain-insecure: ${zone}"
done
fi
+
+ echo "forward-zone:"
+ echo " name: \".\""
+
+ # Force using TLS only
+ if [ "${PROTO}" = "TLS" ]; then
+ echo " forward-tls-upstream: yes"
+ fi
+
+ # Add upstream name servers
+ local ns
+ for ns in $(read_name_servers); do
+ echo " forward-addr: ${ns}"
+ done
) > /etc/unbound/forward.conf
}
done < /proc/meminfo
}
-test_name_server() {
- local ns=${1}
- local args
-
- # Return codes:
- # 0 DNSSEC validating
- # 1 Error: unreachable, etc.
- # 2 DNSSEC aware
- # 3 NOT DNSSEC-aware
-
- # Exit when the server is not reachable
- ns_is_online ${ns} || return 1
-
- # Determine the maximum edns buffer size that works
- local edns_buffer_size=$(ns_determine_edns_buffer_size ${ns})
- if [ -n "${edns_buffer_size}" ]; then
- args="${args} +bufsize=${edns_buffer_size}"
- fi
-
- local errors
- for rr in DNSKEY DS RRSIG; do
- if ! ns_forwards_${rr} ${ns} ${args}; then
- errors="${errors} ${rr}"
- fi
- done
-
- if [ -n "${errors}" ]; then
- echo >&2 "Unable to retrieve the following resource records from ${ns}: ${errors:1}"
- return 3
- fi
-
- if ns_is_validating ${ns} ${args}; then
- # Return 0 if validating
- return 0
- else
- # Is DNSSEC-aware
- return 2
- fi
-}
-
-# Sends an A query to the nameserver w/o DNSSEC
-ns_is_online() {
- local ns=${1}
- shift
-
- dig "${DIG_ARGS[@]}" @${ns} +nodnssec A ${TEST_DOMAIN} $@ >/dev/null
-}
-
-# Resolving ${TEST_DOMAIN_FAIL} will fail if the nameserver is validating
-ns_is_validating() {
- local ns=${1}
- shift
-
- if ! dig "${DIG_ARGS[@]}" @${ns} A ${TEST_DOMAIN_FAIL} $@ | grep -q SERVFAIL; then
- return 1
- else
- # Determine if NS replies with "ad" data flag if DNSSEC enabled
- dig "${DIG_ARGS[@]}" @${ns} +dnssec SOA ${TEST_DOMAIN} $@ | awk -F: '/\;\;\ flags\:/ { s=1; if (/\ ad/) s=0; exit s }'
- fi
-}
-
-# Checks if we can retrieve the DNSKEY for this domain.
-# dig will print the SOA if nothing was found
-ns_forwards_DNSKEY() {
- local ns=${1}
- shift
-
- dig "${DIG_ARGS[@]}" @${ns} DNSKEY ${TEST_DOMAIN} $@ | grep -qv SOA
-}
-
-ns_forwards_DS() {
- local ns=${1}
- shift
-
- dig "${DIG_ARGS[@]}" @${ns} DS ${TEST_DOMAIN} $@ | grep -qv SOA
-}
-
-ns_forwards_RRSIG() {
- local ns=${1}
- shift
-
- dig "${DIG_ARGS[@]}" @${ns} +dnssec A ${TEST_DOMAIN} $@ | grep -q RRSIG
-}
-
-ns_supports_tcp() {
- local ns=${1}
- shift
-
- # If TCP is forced we know by now if the server responds to it
- if [ "${FORCE_TCP}" = "on" ]; then
+fix_time_if_dns_fails() {
+ # If DNS is working, everything is fine
+ if resolve "ping.ipfire.org" &>/dev/null; then
return 0
fi
- dig "${DIG_ARGS[@]}" @${ns} +tcp A ${TEST_DOMAIN} $@ >/dev/null || return 1
-}
-
-ns_determine_edns_buffer_size() {
- local ns=${1}
- shift
-
- local b
- for b in 4096 2048 1500 1480 1464 1400 1280 512; do
- if dig "${DIG_ARGS[@]}" @${ns} +dnssec +bufsize=${b} A ${TEST_DOMAIN} $@ >/dev/null; then
- echo "${b}"
- return 0
- fi
- done
-
- return 1
+ # Try to sync time with a known time server
+ boot_mesg "DNS not functioning... Trying to sync time with ntp.ipfire.org (81.3.27.46)..."
+ loadproc /usr/local/bin/settime 81.3.27.46
}
-get_root_nameservers() {
- while read -r hostname ttl record address; do
- # Searching for A records
- [ "${record}" = "A" ] || continue
-
- echo "${address}"
- done < /etc/unbound/root.hints
-}
+resolve() {
+ local hostname="${1}"
-can_resolve_root() {
- local ns
- for ns in $(get_root_nameservers); do
- if dig "${DIG_ARGS[@]}" @${ns} +dnssec SOA . $@ >/dev/null; then
- return 0
+ local answer
+ for answer in $(dig +short A "${hostname}"); do
+ # Filter out non-IP addresses
+ if [[ ! "${answer}" =~ \.$ ]]; then
+ echo "${answer}"
fi
done
-
- # none of the servers was reachable
- return 1
}
-enable_dnssec() {
- local status=$(unbound-control get_option val-permissive-mode)
-
- # Log DNSSEC status
- echo "on" > /var/ipfire/red/dnssec-status
-
- # Don't do anything if DNSSEC is already activated
- [ "${status}" = "no" ] && return 0
-
- # Activate DNSSEC and flush cache with any stale and unvalidated data
- unbound-control -q set_option val-permissive-mode: no
- unbound-control -q flush_zone .
-}
-
-disable_dnssec() {
- # Log DNSSEC status
- echo "off" > /var/ipfire/red/dnssec-status
+update_forwarders() {
+ # Do nothing when we do not use the ISP name servers
+ [ "${USE_ISP_NAMESERVERS}" != "on" ] && return 0
- unbound-control -q set_option val-permissive-mode: yes
-}
+ # We cannot update anything when using TLS
+ # Unbound will then try to connect to the servers using UDP on port 853
+ [ "${PROTO}" = "TLS" ] && return 0
-fix_time_if_dns_fail() {
- # If DNS still not work try to init ntp with
- # hardcoded ntp.ipfire.org (81.3.27.46)
- check_red_has_carrier_and_ip
- if [ -e "/var/ipfire/red/iface" -a "${?}" = "1" ]; then
- host 0.ipfire.pool.ntp.org > /dev/null 2>&1
- if [ "${?}" != "0" ]; then
- boot_mesg "DNS still not functioning... Trying to sync time with ntp.ipfire.org (81.3.27.46)..."
- loadproc /usr/local/bin/settime 81.3.27.46
- fi
+ # Update unbound about the new servers
+ local nameservers=( $(read_name_servers) )
+ if [ -n "${nameservers[*]}" ]; then
+ unbound-control -q forward "${nameservers[@]}"
+ else
+ unbound-control -q forward off
fi
}
-resolve() {
- local hostname="${1}"
-
- local found=0
- local ns
- for ns in $(read_name_servers); do
- local answer
- for answer in $(dig "${DIG_ARGS[@]}" +short "@${ns}" A "${hostname}"); do
- found=1
-
- # Filter out non-IP addresses
- if [[ ! "${answer}" =~ \.$ ]]; then
- echo "${answer}"
- fi
- done
-
- # End loop when we have got something
- [ ${found} -eq 1 ] && break
- done
-}
-
# Sets up Safe Search for various search engines
-write_safe_search_conf() {
+update_safe_search() {
local google_tlds=(
google.ad
google.ae
google.ws
)
- (
- # Nothing to do if safe search is not enabled
- if [ "${ENABLE_SAFE_SEARCH}" != "on" ]; then
- exit 0
- fi
+ # Cleanup previous settings
+ unbound-control local_zone_remove "bing.com" >/dev/null
+ unbound-control local_zone_remove "duckduckgo.com" >/dev/null
+ unbound-control local_zone_remove "yandex.com" >/dev/null
+ unbound-control local_zone_remove "yandex.ru" >/dev/null
+ unbound-control local_zone_remove "youtube.com" >/dev/null
- # This all belongs into the server: section
- echo "server:"
+ local domain
+ for domain in ${google_tlds[@]}; do
+ unbound-control local_zone_remove "${domain}"
+ done >/dev/null
- # Bing
- echo " local-zone: bing.com transparent"
- for address in $(resolve "strict.bing.com"); do
- echo " local-data: \"www.bing.com ${LOCAL_TTL} IN A ${address}\""
- done
+ # Nothing to do if safe search is not enabled
+ if [ "${ENABLE_SAFE_SEARCH}" != "on" ]; then
+ return 0
+ fi
- # DuckDuckGo
- echo " local-zone: duckduckgo.com typetransparent"
- for address in $(resolve "safe.duckduckgo.com"); do
- echo " local-data: \"duckduckgo.com ${LOCAL_TTL} IN A ${address}\""
- done
+ # Bing
+ unbound-control bing.com transparent >/dev/null
+ for address in $(resolve "strict.bing.com"); do
+ unbound-control local_data "www.bing.com ${LOCAL_TTL} IN A ${address}"
+ done >/dev/null
+
+ # DuckDuckGo
+ unbound-control local_zone duckduckgo.com typetransparent >/dev/null
+ for address in $(resolve "safe.duckduckgo.com"); do
+ unbound-control local_data "duckduckgo.com ${LOCAL_TTL} IN A ${address}"
+ done >/dev/null
+
+ # Google
+ local addresses="$(resolve "forcesafesearch.google.com")"
+ for domain in ${google_tlds[@]}; do
+ unbound-control local_zone "${domain}" transparent >/dev/null
+ for address in ${addresses}; do
+ unbound-control local_data: "www.${domain} ${LOCAL_TTL} IN A ${address}"
+ done >/dev/null
+ done
- # Google
- addresses="$(resolve "forcesafesearch.google.com")"
- local domain
- for domain in ${google_tlds[@]}; do
- echo " local-zone: ${domain} transparent"
- for address in ${addresses}; do
- echo " local-data: \"www.${domain} ${LOCAL_TTL} IN A ${address}\""
- done
- done
+ # Yandex
+ for domain in yandex.com yandex.ru; do
+ unbound-control local_zone "${domain}" typetransparent >/dev/null
+ for address in $(resolve "familysearch.${domain}"); do
+ unbound-control local_data "${domain} ${LOCAL_TTL} IN A ${address}"
+ done >/dev/null
+ done
- # Yandex
- for domain in yandex.com yandex.ru; do
- echo " local-zone: ${domain} typetransparent"
- for address in $(resolve "familysearch.${domain}"); do
- echo " local-data: \"${domain} ${LOCAL_TTL} IN A ${address}\""
- done
- done
+ # YouTube
+ unbound-control local_zone youtube.com transparent >/dev/null
+ for address in $(resolve "restrictmoderate.youtube.com"); do
+ unbound-control local_data "www.youtube.com ${LOCAL_TTL} IN A ${address}"
+ done >/dev/null
- # YouTube
- echo " local-zone: youtube.com transparent"
- for address in $(resolve "restrictmoderate.youtube.com"); do
- echo " local-data: \"www.youtube.com ${LOCAL_TTL} IN A ${address}\""
- done
- ) > /etc/unbound/safe-search.conf
+ return 0
}
case "$1" in
exit 0
fi
- eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
-
# Update configuration files
write_tuning_conf
write_forward_conf
- write_safe_search_conf
boot_mesg "Starting Unbound DNS Proxy..."
loadproc /usr/sbin/unbound || exit $?
- # Make own hostname resolveable
- own_hostname
-
- # Update any known forwarding name servers
- update_forwarders
+ # Install Safe Search rules when the system is already online
+ if [ -e "/var/ipfire/red/active" ]; then
+ update_safe_search
+ fi
# Update hosts
update_hosts
-
- fix_time_if_dns_fail
;;
stop)
sleep 1
$0 start
;;
+ reload)
+ # Update configuration files
+ write_tuning_conf
+ write_forward_conf
+
+ # Update Safe Search rules if the system is online.
+ if [ -e "/var/ipfire/red/active" ]; then
+ update_safe_search
+ fi
+
+ # Update hosts.
+ update_hosts
+
+ # Call unbound-control and perform the reload
+ /usr/sbin/unbound-control -q reload
+ ;;
status)
statusproc /usr/sbin/unbound
;;
update-forwarders)
- # Do not try updating forwarders when unbound is not running
- if ! pgrep unbound &>/dev/null; then
- exit 0
- fi
-
update_forwarders
- unbound-control flush_negative > /dev/null
- unbound-control flush_bogus > /dev/null
+ # Make sure DNS works at this point
+ fix_time_if_dns_fails
- fix_time_if_dns_fail
+ # Update Safe Search settings
+ update_safe_search
;;
remove-forwarders)
- # Do not try updating forwarders when unbound is not running
- if ! pgrep unbound &>/dev/null; then
- exit 0
- fi
-
- remove_forwarders
-
- unbound-control flush_negative > /dev/null
- unbound-control flush_bogus > /dev/null
- ;;
-
-
- test-name-server)
- ns=${2}
-
- test_name_server ${ns}
- ret=${?}
-
- case "${ret}" in
- 0)
- echo "${ns} is validating"
- ;;
- 2)
- echo "${ns} is DNSSEC-aware"
- ;;
- 3)
- echo "${ns} is NOT DNSSEC-aware"
- ;;
- *)
- echo "Test failed for an unknown reason"
- exit ${ret}
- ;;
- esac
-
- if ns_supports_tcp ${ns}; then
- echo "${ns} supports TCP fallback"
- else
- echo "${ns} does not support TCP fallback"
- fi
-
- edns_buffer_size=$(ns_determine_edns_buffer_size ${ns})
- if [ -n "${edns_buffer_size}" ]; then
- echo "EDNS buffer size for ${ns}: ${edns_buffer_size}"
- fi
-
- exit ${ret}
+ update_forwarders
;;
resolve)
resolve "${2}"
;;
+ update-safe-search)
+ update_safe_search
+ ;;
+
*)
- echo "Usage: $0 {start|stop|restart|status|update-forwarders|remove-forwarders|test-name-server|resolve}"
+ echo "Usage: $0 {start|stop|restart|reload|status|resolve|update-forwarders|remove-forwarders|update-safe-search}"
exit 1
;;
esac
projects / ipfire-2.x.git / blobdiff