diff --git a/a-records.conf b/a-records.conf new file mode 100644 index 0000000..319d934 --- /dev/null +++ b/a-records.conf @@ -0,0 +1,5 @@ +# A Record + #local-data: "somecomputer.local. A 192.168.1.1" + +# PTR Record + #local-data-ptr: "192.168.1.1 somecomputer.local." diff --git a/forward-records.conf b/forward-records.conf new file mode 100644 index 0000000..c13ec2f --- /dev/null +++ b/forward-records.conf @@ -0,0 +1 @@ +# Geen forward-zone sectie meer diff --git a/srv-records.conf b/srv-records.conf new file mode 100644 index 0000000..fccdd51 --- /dev/null +++ b/srv-records.conf @@ -0,0 +1,2 @@ +# SRV records +# _service._proto.name. | TTL | class | SRV | priority | weight | port | target. diff --git a/unbound.conf b/unbound.conf new file mode 100644 index 0000000..474f21f --- /dev/null +++ b/unbound.conf @@ -0,0 +1,364 @@ +server: + ########################################################################### + # BASIC SETTINGS + ########################################################################### + # Time to live maximum for RRsets and messages in the cache. If the maximum + # kicks in, responses to clients still get decrementing TTLs based on the + # original (larger) values. When the internal TTL expires, the cache item + # has expired. Can be set lower to force the resolver to query for data + # often, and not trust (very large) TTL values. + cache-max-ttl: 86400 + + # Time to live minimum for RRsets and messages in the cache. If the minimum + # kicks in, the data is cached for longer than the domain owner intended, + # and thus less queries are made to look up the data. Zero makes sure the + # data in the cache is as the domain owner intended, higher values, + # especially more than an hour or so, can lead to trouble as the data in + # the cache does not match up with the actual data any more. + cache-min-ttl: 300 + + # Set the working directory for the program. + directory: "/opt/unbound/etc/unbound" + + # If enabled, Unbound will respond with Extended DNS Error codes (RFC 8914). + # These EDEs attach informative error messages to a response for various + # errors. + # When the val-log-level: option is also set to 2, responses with Extended + # DNS Errors concerning DNSSEC failures that are not served from cache, will + # also contain a descriptive text message about the reason for the failure. + ede: yes + + # If enabled, Unbound will attach an Extended DNS Error (RFC 8914) + # Code 3 - Stale Answer as EDNS0 option to the expired response. + # This will not attach the EDE code without setting ede: yes as well. + ede-serve-expired: yes + + # RFC 6891. Number of bytes size to advertise as the EDNS reassembly buffer + # size. This is the value put into datagrams over UDP towards peers. + # The actual buffer size is determined by msg-buffer-size (both for TCP and + # UDP). Do not set higher than that value. + # Default is 1232 which is the DNS Flag Day 2020 recommendation. + # Setting to 512 bypasses even the most stringent path MTU problems, but + # is seen as extreme, since the amount of TCP fallback generated is + # excessive (probably also for this resolver, consider tuning the outgoing + # tcp number). + edns-buffer-size: 1232 + + # Listen to for queries from clients and answer from this network interface + # and port. + interface: 0.0.0.0@53 + + # Rotates RRSet order in response (the pseudo-random number is taken from + # the query ID, for speed and thread safety). + rrset-roundrobin: yes + + # Drop user privileges after binding the port. + username: "_unbound" + + ########################################################################### + # LOGGING + ########################################################################### + + # Do not print log lines to inform about local zone actions + log-local-actions: no + + # Do not print one line per query to the log + log-queries: no + + # Do not print one line per reply to the log + log-replies: no + + # Do not print log lines that say why queries return SERVFAIL to clients + log-servfail: no + + # If you want to log to a file, use: + # logfile: /opt/unbound/etc/unbound/unbound.log + # Set log location (using /dev/null further limits logging) + logfile: /dev/null + + # Set logging level + # Level 0: No verbosity, only errors. + # Level 1: Gives operational information. + # Level 2: Gives detailed operational information including short information per query. + # Level 3: Gives query level information, output per query. + # Level 4: Gives algorithm level information. + # Level 5: Logs client identification for cache misses. + verbosity: 0 + + ########################################################################### + # PRIVACY SETTINGS + ########################################################################### + + # RFC 8198. Use the DNSSEC NSEC chain to synthesize NXDO-MAIN and other + # denials, using information from previous NXDO-MAINs answers. In other + # words, use cached NSEC records to generate negative answers within a + # range and positive answers from wildcards. This increases performance, + # decreases latency and resource utilization on both authoritative and + # recursive servers, and increases privacy. Also, it may help increase + # resilience to certain DoS attacks in some circumstances. + aggressive-nsec: yes + + # Extra delay for timeouted UDP ports before they are closed, in msec. + # This prevents very delayed answer packets from the upstream (recursive) + # servers from bouncing against closed ports and setting off all sort of + # close-port counters, with eg. 1500 msec. When timeouts happen you need + # extra sockets, it checks the ID and remote IP of packets, and unwanted + # packets are added to the unwanted packet counter. + delay-close: 10000 + + # Prevent the unbound server from forking into the background as a daemon + do-daemonize: no + + # Add localhost to the do-not-query-address list. + do-not-query-localhost: no + + # Number of bytes size of the aggressive negative cache. + neg-cache-size: 4M + + # Send minimum amount of information to upstream servers to enhance + # privacy (best privacy). + qname-minimisation: yes + + ########################################################################### + # SECURITY SETTINGS + ########################################################################### + # Only give access to recursion clients from LAN IPs + access-control: 127.0.0.1/32 allow + access-control: 192.168.0.0/16 allow + access-control: 172.16.0.0/12 allow + access-control: 10.0.0.0/8 allow + # access-control: fc00::/7 allow + # access-control: ::1/128 allow + + # File with trust anchor for one zone, which is tracked with RFC5011 + # probes. + auto-trust-anchor-file: "var/root.key" + + # Enable chroot (i.e, change apparent root directory for the current + # running process and its children) + chroot: "/opt/unbound/etc/unbound" + + # Deny queries of type ANY with an empty response. + deny-any: yes + + # Harden against algorithm downgrade when multiple algorithms are + # advertised in the DS record. + harden-algo-downgrade: yes + + # Harden against unknown records in the authority section and additional + # section. If no, such records are copied from the upstream and presented + # to the client together with the answer. If yes, it could hamper future + # protocol developments that want to add records. + harden-unknown-additional: yes + + # RFC 8020. returns nxdomain to queries for a name below another name that + # is already known to be nxdomain. + harden-below-nxdomain: yes + + # Require DNSSEC data for trust-anchored zones, if such data is absent, the + # zone becomes bogus. If turned off you run the risk of a downgrade attack + # that disables security for a zone. + harden-dnssec-stripped: yes + + # Only trust glue if it is within the servers authority. + harden-glue: yes + + # Ignore very large queries. + harden-large-queries: yes + + # Perform additional queries for infrastructure data to harden the referral + # path. Validates the replies if trust anchors are configured and the zones + # are signed. This enforces DNSSEC validation on nameserver NS sets and the + # nameserver addresses that are encountered on the referral path to the + # answer. Experimental option. + harden-referral-path: no + + # Ignore very small EDNS buffer sizes from queries. + harden-short-bufsize: yes + + # If enabled the HTTP header User-Agent is not set. Use with caution + # as some webserver configurations may reject HTTP requests lacking + # this header. If needed, it is better to explicitly set the + # the http-user-agent. + hide-http-user-agent: no + + # Refuse id.server and hostname.bind queries + hide-identity: yes + + # Refuse version.server and version.bind queries + hide-version: yes + + # Set the HTTP User-Agent header for outgoing HTTP requests. If + # set to "", the default, then the package name and version are + # used. + http-user-agent: "DNS" + + # Report this identity rather than the hostname of the server. + identity: "DNS" + + # These private network addresses are not allowed to be returned for public + # internet names. Any occurrence of such addresses are removed from DNS + # answers. Additionally, the DNSSEC validator may mark the answers bogus. + # This protects against DNS Rebinding + 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 + # private-address: ::ffff:0:0/96 + + # Enable ratelimiting of queries (per second) sent to nameserver for + # performing recursion. More queries are turned away with an error + # (servfail). This stops recursive floods (e.g., random query names), but + # not spoofed reflection floods. Cached responses are not rate limited by + # this setting. Experimental option. + ratelimit: 1000 + + # Use this certificate bundle for authenticating connections made to + # outside peers (e.g., auth-zone urls, DNS over TLS connections). + tls-cert-bundle: /etc/ssl/certs/ca-certificates.crt + + # Set the total number of unwanted replies to eep track of in every thread. + # When it reaches the threshold, a defensive action of clearing the rrset + # and message caches is taken, hopefully flushing away any poison. + # Unbound suggests a value of 10 million. + unwanted-reply-threshold: 10000 + + # Use 0x20-encoded random bits in the query to foil spoof attempts. This + # perturbs the lowercase and uppercase of query names sent to authority + # servers and checks if the reply still has the correct casing. + # This feature is an experimental implementation of draft dns-0x20. + # Experimental option. + use-caps-for-id: yes + + # Help protect users that rely on this validator for authentication from + # potentially bad data in the additional section. Instruct the validator to + # remove data from the additional section of secure messages that are not + # signed properly. Messages that are insecure, bogus, indeterminate or + # unchecked are not affected. + val-clean-additional: yes + + ########################################################################### + # PERFORMANCE SETTINGS + ########################################################################### + # https://nlnetlabs.nl/documentation/unbound/howto-optimise/ + # https://nlnetlabs.nl/news/2019/Feb/05/unbound-1.9.0-released/ + + # Number of slabs in the infrastructure cache. Slabs reduce lock contention + # by threads. Must be set to a power of 2. + infra-cache-slabs: 4 + + # Number of incoming TCP buffers to allocate per thread. Default + # is 10. If set to 0, or if do-tcp is "no", no TCP queries from + # clients are accepted. For larger installations increasing this + # value is a good idea. + incoming-num-tcp: 10 + + # Number of slabs in the key cache. Slabs reduce lock contention by + # threads. Must be set to a power of 2. Setting (close) to the number + # of cpus is a reasonable guess. + key-cache-slabs: 4 + + # Number of bytes size of the message cache. + # Unbound recommendation is to Use roughly twice as much rrset cache memory + # as you use msg cache memory. + msg-cache-size: 474047829 + + # Number of slabs in the message cache. Slabs reduce lock contention by + # threads. Must be set to a power of 2. Setting (close) to the number of + # cpus is a reasonable guess. + msg-cache-slabs: 4 + + # The number of queries that every thread will service simultaneously. If + # more queries arrive that need servicing, and no queries can be jostled + # out (see jostle-timeout), then the queries are dropped. + # This is best set at half the number of the outgoing-range. + # This Unbound instance was compiled with libevent so it can efficiently + # use more than 1024 file descriptors. + num-queries-per-thread: 4096 + + # The number of threads to create to serve clients. + # This is set dynamically at run time to effectively use available CPUs + # resources + num-threads: 3 + + # Number of ports to open. This number of file descriptors can be opened + # per thread. + # This Unbound instance was compiled with libevent so it can efficiently + # use more than 1024 file descriptors. + outgoing-range: 8192 + + # Number of bytes size of the RRset cache. + # Use roughly twice as much rrset cache memory as msg cache memory + rrset-cache-size: 948095658 + + # Number of slabs in the RRset cache. Slabs reduce lock contention by + # threads. Must be set to a power of 2. + rrset-cache-slabs: 4 + + # Do no insert authority/additional sections into response messages when + # those sections are not required. This reduces response size + # significantly, and may avoid TCP fallback for some responses. This may + # cause a slight speedup. + minimal-responses: yes + + # # Fetch the DNSKEYs earlier in the validation process, when a DS record + # is encountered. This lowers the latency of requests at the expense of + # little more CPU usage. + prefetch: yes + + # Fetch the DNSKEYs earlier in the validation process, when a DS record is + # encountered. This lowers the latency of requests at the expense of little + # more CPU usage. + prefetch-key: yes + + # Have unbound attempt to serve old responses from cache with a TTL of 0 in + # the response without waiting for the actual resolution to finish. The + # actual resolution answer ends up in the cache later on. + serve-expired: yes + + # UDP queries that have waited in the socket buffer for a long time can be + # dropped. The time is set in seconds, 3 could be a good value to ignore old + # queries that likely the client does not need a reply for any more. This + # could happen if the host has not been able to service the queries for a + # while, i.e. Unbound is not running, and then is enabled again. It uses + # timestamp socket options. + sock-queue-timeout: 3 + + # Open dedicated listening sockets for incoming queries for each thread and + # try to set the SO_REUSEPORT socket option on each socket. May distribute + # incoming queries to threads more evenly. + so-reuseport: yes + + ########################################################################### + # LOCAL ZONE + ########################################################################### + + # Include file for local-data and local-data-ptr + include: /opt/unbound/etc/unbound/a-records.conf + include: /opt/unbound/etc/unbound/srv-records.conf + + ########################################################################### + # FORWARD ZONE + ########################################################################### + + include: /opt/unbound/etc/unbound/forward-records.conf + + +# Remote control config section. +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. + # set to an absolute path to use a unix local name pipe, certificates + # are not used for that, so key and cert files need not be present. + control-interface: 0.0.0.0 + # control-interface: ::1 + + # for localhost, you can disable use of TLS by setting this to "no" + # For local sockets this option is ignored, and TLS is not used. + control-use-cert: no