[Pkg-dns-devel] Bug#804752: unbound: After upgrade to 1.5.6, unbound does not start on default configuration.
Paweł Różański
rozie at poczta.onet.pl
Wed Nov 11 08:57:36 UTC 2015
Package: unbound
Version: 1.5.6-1
Severity: normal
Dear Maintainer,
I run unbound on my laptop with Debian unstable as local DNS cache. After standard upgrade of pacakges
I noticed, that my DNS resolver does not work anymore. Unbound service does not run/start. After
enabling debug I found in syslog:
fatal error: could not open autotrust file for writing, /etc/unbound/root.key.3265-0: Permission denied
Indeed, I used /var/lib/unbound/root.key in 1.4:
ls -ltr /var/lib/unbound/root.key
-rw-r--r-- 1 unbound unbound 759 lis 11 09:44 /var/lib/unbound/root.key
1.5.6 tried to use /etc/unbound/root.key:
ls -ltra /etc/unbound/root.key
-rw-r--r-- 1 root root 759 lis 10 09:33 /etc/unbound/root.key
1.4 probably used conf.d, and 1.5.4 probably does not, as I have
cat /etc/unbound/unbound.conf.d/root-auto-trust-anchor-file.conf
server:
# The following line will configure unbound to perform cryptographic
# DNSSEC validation using the root trust anchor.
auto-trust-anchor-file: "/var/lib/unbound/root.key"
I also checked exactly the same default configuration on previous version - works with 1.4.
Below is my current, working configuration. The only change is auto-trust-anchor-file line.
I believe configuration file should be modified as below or reading conf.d should be
restored. Right now service does not work on default configuration and may disrupt services.
Kind regards,
Paweł
-- System Information:
Debian Release: stretch/sid
APT prefers unstable
APT policy: (450, 'unstable'), (400, 'testing'), (200, 'stable'), (100, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.2.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=pl_PL, LC_CTYPE=pl_PL (charmap=ISO-8859-2)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages unbound depends on:
ii adduser 3.113+nmu3
ii libc6 2.19-22
ii libevent-2.0-5 2.0.21-stable-2+b1
ii libfstrm0 0.2.0-1
ii libprotobuf-c1 1.1.1-1
ii libpython2.7 2.7.10-5+b1
ii libssl1.0.2 1.0.2d-3
ii openssl 1.0.2d-3
ii unbound-anchor 1.5.6-1
unbound recommends no packages.
unbound suggests no packages.
-- Configuration Files:
/etc/unbound/unbound.conf changed:
server:
# whitespace is not necessary, but looks cleaner.
# verbosity number, 0 is least verbose. 1 is default.
verbosity: 1
# print statistics to the log (for every thread) every N seconds.
# Set to "" or 0 to disable. Default is disabled.
# statistics-interval: 0
# enable cumulative statistics, without clearing them after printing.
# statistics-cumulative: no
# enable extended statistics (query types, answer codes, status)
# printed from unbound-control. default off, because of speed.
# extended-statistics: no
# number of threads to create. 1 disables threading.
num-threads: 4
# power of 2 close to num-threads
msg-cache-slabs: 4
rrset-cache-slabs: 4
infra-cache-slabs: 4
key-cache-slabs: 4
# more cache memory, rrset=msg*2
rrset-cache-size: 50m
msg-cache-size: 25m
# more outgoing connections
# depends on number of cores: 1024/cores - 50
outgoing-range: 200
# Larger socket buffer. OS may need config.
so-rcvbuf: 8m
so-sndbuf: 8m
# specify the interfaces to answer queries from by ip-address.
# The default is to listen to localhost (127.0.0.1 and ::1).
# specify 0.0.0.0 and ::0 to bind to all available interfaces.
# specify every interface[@port] on a new 'interface:' labelled line.
# The listen interfaces are not changed on reload, only on restart.
# interface: 192.0.2.153
# interface: 192.0.2.154
# interface: 192.0.2.154 at 5003
# interface: 2001:DB8::5
# enable this feature to copy the source address of queries to reply.
# Socket options are not supported on all platforms. experimental.
# interface-automatic: no
# port to answer queries from
# port: 53
# specify the interfaces to send outgoing queries to authoritative
# server from by ip-address. If none, the default (all) interface
# is used. Specify every interface on a 'outgoing-interface:' line.
# outgoing-interface: 192.0.2.153
# outgoing-interface: 2001:DB8::5
# outgoing-interface: 2001:DB8::6
# number of ports to allocate per thread, determines the size of the
# port range that can be open simultaneously. About double the
# num-queries-per-thread, or, use as many as the OS will allow you.
# outgoing-range: 4096
# permit unbound to use this port number or port range for
# making outgoing queries, using an outgoing interface.
# outgoing-port-permit: 32768
# deny unbound the use this of port number or port range for
# making outgoing queries, using an outgoing interface.
# Use this to make sure unbound does not grab a UDP port that some
# other server on this computer needs. The default is to avoid
# IANA-assigned port numbers.
# If multiple outgoing-port-permit and outgoing-port-avoid options
# are present, they are processed in order.
# outgoing-port-avoid: "3200-3208"
# number of outgoing simultaneous tcp buffers to hold per thread.
# outgoing-num-tcp: 10
# number of incoming simultaneous tcp buffers to hold per thread.
# incoming-num-tcp: 10
# buffer size for UDP port 53 incoming (SO_RCVBUF socket option).
# 0 is system default. Use 4m to catch query spikes for busy servers.
# so-rcvbuf: 0
# buffer size for UDP port 53 outgoing (SO_SNDBUF socket option).
# 0 is system default. Use 4m to handle spikes on very busy servers.
# so-sndbuf: 0
# EDNS reassembly buffer to advertise to UDP peers (the actual buffer
# is set with msg-buffer-size). 1480 can solve fragmentation (timeouts).
# edns-buffer-size: 4096
# buffer size for handling DNS data. No messages larger than this
# size can be sent or received, by UDP or TCP. In bytes.
# msg-buffer-size: 65552
# the amount of memory to use for the message cache.
# plain value in bytes or you can append k, m or G. default is "4Mb".
# msg-cache-size: 4m
# the number of slabs to use for the message cache.
# the number of slabs must be a power of 2.
# more slabs reduce lock contention, but fragment memory usage.
#msg-cache-slabs: 2
# the number of queries that a thread gets to service.
# num-queries-per-thread: 1024
# if very busy, 50% queries run to completion, 50% get timeout in msec
# jostle-timeout: 200
# the amount of memory to use for the RRset cache.
# plain value in bytes or you can append k, m or G. default is "4Mb".
# rrset-cache-size: 4m
# the number of slabs to use for the RRset cache.
# the number of slabs must be a power of 2.
# more slabs reduce lock contention, but fragment memory usage.
# rrset-cache-slabs: 4
# the time to live (TTL) value lower bound, in seconds. Default 0.
# If more than an hour could easily give trouble due to stale data.
# cache-min-ttl: 0
# the time to live (TTL) value cap for RRsets and messages in the
# cache. Items are not cached for longer. In seconds.
# cache-max-ttl: 86400
# the time to live (TTL) value for cached roundtrip times, lameness and
# EDNS version information for hosts. In seconds.
# infra-host-ttl: 900
# the number of slabs to use for the Infrastructure cache.
# the number of slabs must be a power of 2.
# more slabs reduce lock contention, but fragment memory usage.
# infra-cache-slabs: 4
# the maximum number of hosts that are cached (roundtrip, EDNS, lame).
# infra-cache-numhosts: 10000
# Enable IPv4, "yes" or "no".
# do-ip4: yes
# Enable IPv6, "yes" or "no".
# do-ip6: yes
# Enable UDP, "yes" or "no".
# do-udp: yes
# Enable TCP, "yes" or "no".
# do-tcp: yes
# upstream connections use TCP only (and no UDP), "yes" or "no"
# useful for tunneling scenarios, default no.
# tcp-upstream: no
# Detach from the terminal, run in background, "yes" or "no".
# do-daemonize: yes
# control which clients are allowed to make (recursive) queries
# to this server. Specify classless netblocks with /size and action.
# By default everything is refused, except for localhost.
# Choose deny (drop message), refuse (polite error reply),
# allow (recursive ok), allow_snoop (recursive and nonrecursive ok)
# access-control: 0.0.0.0/0 refuse
# access-control: 127.0.0.0/8 allow
# access-control: ::0/0 refuse
# access-control: ::1 allow
# access-control: ::ffff:127.0.0.1 allow
# if given, a chroot(2) is done to the given directory.
# i.e. you can chroot to the working directory, for example,
# for extra security, but make sure all files are in that directory.
#
# If chroot is enabled, you should pass the configfile (from the
# commandline) as a full path from the original root. After the
# chroot has been performed the now defunct portion of the config
# file path is removed to be able to reread the config after a reload.
#
# All other file paths (working dir, logfile, roothints, and
# key files) can be specified in several ways:
# o as an absolute path relative to the new root.
# o as a relative path to the working directory.
# o as an absolute path relative to the original root.
# In the last case the path is adjusted to remove the unused portion.
#
# The pid file can be absolute and outside of the chroot, it is
# written just prior to performing the chroot and dropping permissions.
#
# Additionally, unbound may need to access /dev/random (for entropy).
# How to do this is specific to your OS.
#
# If you give "" no chroot is performed. The path must not end in a /.
# chroot: "/etc/unbound"
# if given, user privileges are dropped (after binding port),
# and the given username is assumed. Default is user "unbound".
# If you give "" no privileges are dropped.
# username: "unbound"
# the working directory. The relative files in this config are
# relative to this directory. If you give "" the working directory
# is not changed.
# directory: "/etc/unbound"
# the log file, "" means log to stderr.
# Use of this option sets use-syslog to "no".
# logfile: ""
# Log to syslog(3) if yes. The log facility LOG_DAEMON is used to
# log to, with identity "unbound". If yes, it overrides the logfile.
# use-syslog: yes
# print UTC timestamp in ascii to logfile, default is epoch in seconds.
# log-time-ascii: no
# print one line with time, IP, name, type, class for every query.
# log-queries: no
# the pid file. Can be an absolute path outside of chroot/work dir.
# pidfile: "/etc/unbound/unbound.pid"
# file to read root hints from.
# get one from ftp://FTP.INTERNIC.NET/domain/named.cache
# root-hints: ""
# enable to not answer id.server and hostname.bind queries.
# hide-identity: no
# enable to not answer version.server and version.bind queries.
# hide-version: no
# the identity to report. Leave "" or default to return hostname.
# identity: ""
# the version to report. Leave "" or default to return package version.
# version: ""
# the target fetch policy.
# series of integers describing the policy per dependency depth.
# The number of values in the list determines the maximum dependency
# depth the recursor will pursue before giving up. Each integer means:
# -1 : fetch all targets opportunistically,
# 0: fetch on demand,
# positive value: fetch that many targets opportunistically.
# Enclose the list of numbers between quotes ("").
# target-fetch-policy: "3 2 1 0 0"
# Harden against very small EDNS buffer sizes.
# harden-short-bufsize: no
# Harden against unseemly large queries.
# harden-large-queries: no
# Harden against out of zone rrsets, to avoid spoofing attempts.
# harden-glue: yes
# Harden against receiving dnssec-stripped data. If you turn it
# off, failing to validate dnskey data for a trustanchor will
# trigger insecure mode for that zone (like without a trustanchor).
# Default on, which insists on dnssec data for trust-anchored zones.
# harden-dnssec-stripped: yes
# Harden against queries that fall under dnssec-signed nxdomain names.
# harden-below-nxdomain: no
# Harden the referral path by performing additional queries for
# infrastructure data. Validates the replies (if possible).
# Default off, because the lookups burden the server. Experimental
# implementation of draft-wijngaards-dnsext-resolver-side-mitigation.
# harden-referral-path: no
# Use 0x20-encoded random bits in the query to foil spoof attempts.
# This feature is an experimental implementation of draft dns-0x20.
# use-caps-for-id: no
# Enforce privacy of these addresses. Strips them away from answers.
# It may cause DNSSEC validation to additionally mark it as bogus.
# Protects against 'DNS Rebinding' (uses browser as network proxy).
# Only 'private-domain' and 'local-data' names are allowed to have
# these private addresses. No default.
# private-address: 10.0.0.0/8
# private-address: 172.16.0.0/12
# private-address: 192.168.0.0/16
# private-address: 169.254.0.0/16
# private-address: fd00::/8
# private-address: fe80::/10
# Allow the domain (and its subdomains) to contain private addresses.
# local-data statements are allowed to contain private addresses too.
# private-domain: "example.com"
# If nonzero, unwanted replies are not only reported in statistics,
# but also a running total is kept per thread. If it reaches the
# threshold, a warning is printed and a defensive action is taken,
# the cache is cleared to flush potential poison out of it.
# A suggested value is 10000000, the default is 0 (turned off).
# unwanted-reply-threshold: 0
# Do not query the following addresses. No DNS queries are sent there.
# List one address per entry. List classless netblocks with /size,
# do-not-query-address: 127.0.0.1/8
# do-not-query-address: ::1
# if yes, the above default do-not-query-address entries are present.
# if no, localhost can be queried (for testing and debugging).
# do-not-query-localhost: yes
# if yes, perform prefetching of almost expired message cache entries.
# prefetch: no
# if yes, perform key lookups adjacent to normal lookups.
# prefetch-key: no
# if yes, Unbound rotates RRSet order in response.
# rrset-roundrobin: no
# if yes, Unbound doesn't insert authority/additional sections
# into response messages when those sections are not required.
# minimal-responses: no
# module configuration of the server. A string with identifiers
# separated by spaces. "iterator" or "validator iterator"
# module-config: "validator iterator"
# File with trusted keys, kept uptodate using RFC5011 probes,
# initial file like trust-anchor-file, then it stores metadata.
# Use several entries, one per domain name, to track multiple zones.
#
# If you want to perform DNSSEC validation, run unbound-anchor before
# you start unbound (i.e. in the system boot scripts). And enable:
# Please note usage of unbound-anchor root anchor is at your own risk
# and under the terms of our LICENSE (see that file in the source).
auto-trust-anchor-file: "/var/lib/unbound/root.key"
# File with DLV trusted keys. Same format as trust-anchor-file.
# There can be only one DLV configured, it is trusted from root down.
# Download http://ftp.isc.org/www/dlv/dlv.isc.org.key
# dlv-anchor-file: "dlv.isc.org.key"
# File with trusted keys for validation. Specify more than one file
# with several entries, one file per entry.
# Zone file format, with DS and DNSKEY entries.
# Note this gets out of date, use auto-trust-anchor-file please.
# trust-anchor-file: ""
# Trusted key for validation. DS or DNSKEY. specify the RR on a
# single line, surrounded by "". TTL is ignored. class is IN default.
# Note this gets out of date, use auto-trust-anchor-file please.
# (These examples are from August 2007 and may not be valid anymore).
# trust-anchor: "nlnetlabs.nl. DNSKEY 257 3 5 AQPzzTWMz8qSWIQlfRnPckx2BiVmkVN6LPupO3mbz7FhLSnm26n6iG9N Lby97Ji453aWZY3M5/xJBSOS2vWtco2t8C0+xeO1bc/d6ZTy32DHchpW 6rDH1vp86Ll+ha0tmwyy9QP7y2bVw5zSbFCrefk8qCUBgfHm9bHzMG1U BYtEIQ=="
# trust-anchor: "jelte.nlnetlabs.nl. DS 42860 5 1 14D739EB566D2B1A5E216A0BA4D17FA9B038BE4A"
# File with trusted keys for validation. Specify more than one file
# with several entries, one file per entry. Like trust-anchor-file
# but has a different file format. Format is BIND-9 style format,
# the trusted-keys { name flag proto algo "key"; }; clauses are read.
# you need external update procedures to track changes in keys.
# trusted-keys-file: ""
# Ignore chain of trust. Domain is treated as insecure.
# domain-insecure: "example.com"
# Override the date for validation with a specific fixed date.
# Do not set this unless you are debugging signature inception
# and expiration. "" or "0" turns the feature off. -1 ignores date.
# val-override-date: ""
# The time to live for bogus data, rrsets and messages. This avoids
# some of the revalidation, until the time interval expires. in secs.
# val-bogus-ttl: 60
# The signature inception and expiration dates are allowed to be off
# by 10% of the signature lifetime (expir-incep) from our local clock.
# This leeway is capped with a minimum and a maximum. In seconds.
# val-sig-skew-min: 3600
# val-sig-skew-max: 86400
# Should additional section of secure message also be kept clean of
# unsecure data. Useful to shield the users of this validator from
# potential bogus data in the additional section. All unsigned data
# in the additional section is removed from secure messages.
# val-clean-additional: yes
# Turn permissive mode on to permit bogus messages. Thus, messages
# for which security checks failed will be returned to clients,
# instead of SERVFAIL. It still performs the security checks, which
# result in interesting log files and possibly the AD bit in
# replies if the message is found secure. The default is off.
# val-permissive-mode: no
# Ignore the CD flag in incoming queries and refuse them bogus data.
# Enable it if the only clients of unbound are legacy servers (w2008)
# that set CD but cannot validate themselves.
# ignore-cd-flag: no
# Have the validator log failed validations for your diagnosis.
# 0: off. 1: A line per failed user query. 2: With reason and bad IP.
# val-log-level: 0
# It is possible to configure NSEC3 maximum iteration counts per
# keysize. Keep this table very short, as linear search is done.
# A message with an NSEC3 with larger count is marked insecure.
# List in ascending order the keysize and count values.
# val-nsec3-keysize-iterations: "1024 150 2048 500 4096 2500"
# instruct the auto-trust-anchor-file probing to add anchors after ttl.
# add-holddown: 2592000 # 30 days
# instruct the auto-trust-anchor-file probing to del anchors after ttl.
# del-holddown: 2592000 # 30 days
# auto-trust-anchor-file probing removes missing anchors after ttl.
# If the value 0 is given, missing anchors are not removed.
# keep-missing: 31622400 # 366 days
# the amount of memory to use for the key cache.
# plain value in bytes or you can append k, m or G. default is "4Mb".
# key-cache-size: 4m
# the number of slabs to use for the key cache.
# the number of slabs must be a power of 2.
# more slabs reduce lock contention, but fragment memory usage.
# key-cache-slabs: 4
# the amount of memory to use for the negative cache (used for DLV).
# plain value in bytes or you can append k, m or G. default is "1Mb".
# neg-cache-size: 1m
# a number of locally served zones can be configured.
# local-zone: <zone> <type>
# local-data: "<resource record string>"
# o deny serves local data (if any), else, drops queries.
# o refuse serves local data (if any), else, replies with error.
# o static serves local data, else, nxdomain or nodata answer.
# o transparent gives local data, but resolves normally for other names
# o redirect serves the zone data for any subdomain in the zone.
# o nodefault can be used to normally resolve AS112 zones.
# o typetransparent resolves normally for other types and other names
#
# defaults are localhost address, reverse for 127.0.0.1 and ::1
# and nxdomain for AS112 zones. If you configure one of these zones
# the default content is omitted, or you can omit it with 'nodefault'.
#
# If you configure local-data without specifying local-zone, by
# default a transparent local-zone is created for the data.
#
# You can add locally served data with
# local-zone: "local." static
# local-data: "mycomputer.local. IN A 192.0.2.51"
# local-data: 'mytext.local TXT "content of text record"'
#
# You can override certain queries with
# local-data: "adserver.example.com A 127.0.0.1"
#
# You can redirect a domain to a fixed address with
# (this makes example.com, www.example.com, etc, all go to 192.0.2.3)
# local-zone: "example.com" redirect
# local-data: "example.com A 192.0.2.3"
#
# Shorthand to make PTR records, "IPv4 name" or "IPv6 name".
# You can also add PTR records using local-data directly, but then
# you need to do the reverse notation yourself.
# local-data-ptr: "192.0.2.3 www.example.com"
# service clients over SSL (on the TCP sockets), with plain DNS inside
# the SSL stream. Give the certificate to use and private key.
# default is "" (disabled). requires restart to take effect.
# ssl-service-key: "path/to/privatekeyfile.key"
# ssl-service-pem: "path/to/publiccertfile.pem"
# ssl-port: 443
# request upstream over SSL (with plain DNS inside the SSL stream).
# Default is no. Can be turned on and off with unbound-control.
# ssl-upstream: no
python:
# Script file to load
# python-script: "/etc/unbound/ubmodule-tst.py"
remote-control:
# Enable remote control with unbound-control(8) here.
# set up the keys and certificates with unbound-control-setup.
# control-enable: no
# what interfaces are listened to for remote control.
# give 0.0.0.0 and ::0 to listen to all interfaces.
# control-interface: 127.0.0.1
# control-interface: ::1
# port number for remote control operations.
# control-port: 8953
# unbound server key file.
# server-key-file: "/etc/unbound/unbound_server.key"
# unbound server certificate file.
# server-cert-file: "/etc/unbound/unbound_server.pem"
# unbound-control key file.
# control-key-file: "/etc/unbound/unbound_control.key"
# unbound-control certificate file.
# control-cert-file: "/etc/unbound/unbound_control.pem"
-- no debconf information
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