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ChaosVPN:DNS
We have a DNS running.
Contents
how to get entries
Email chaosvpn-join@hamburg.ccc.de to get an entry under .hack or to get a reverse-lookup for your IP / range registered.
configs
The main zonefile atm is edited with vim on cvpn-dns.
This server is available at 172.31.0.5.
You can either be secondary and transfer the zonefile, or query this server.
But for queries it is better to use the anycasted IP 172.31.255.53, which is answered by more than one machine and should stay available in case of problem with the master.
HowTo
These are configuration example for multiple nameserver programs - choose the config for the one you are running.
dnsmasq
Add to /etc/dnsmasq.conf:
server=/hack/172.31.255.53 server=/31.172.in-addr.arpa/172.31.255.53 server=/100.10.in-addr.arpa/172.31.255.53 server=/101.10.in-addr.arpa/172.31.255.53 server=/102.10.in-addr.arpa/172.31.255.53 server=/103.10.in-addr.arpa/172.31.255.53 server=/dn42/172.22.0.53 server=/20.172.in-addr.arpa/172.22.0.53 server=/22.172.in-addr.arpa/172.22.0.53 server=/23.172.in-addr.arpa/172.22.0.53
In some configurations, i.E. in OpenWRT, dnsmasq has rebind protection enabled by default. It will be usefull to exclude the domains above. Add to /etc/dnsmasq.conf too:
rebind-domain-ok=hack rebind-domain-ok=31.172.in-addr.arpa rebind-domain-ok=100.10.in-addr.arpa rebind-domain-ok=101.10.in-addr.arpa rebind-domain-ok=102.10.in-addr.arpa rebind-domain-ok=103.10.in-addr.arpa rebind-domain-ok=dn42 rebind-domain-ok=20.172.in-addr.arpa rebind-domain-ok=22.172.in-addr.arpa rebind-domain-ok=23.172.in-addr.arpa
bind9
Should-Do´s:
in /etc/bind/named.conf (or for Debian in /etc/bind/named.conf.local):
NOTE: bind9 in debian now attempts to use DNSSEC, which you need to disable in /etc/bind/named.conf.options. Change 'dnssec-validation auto;' to 'dnssec-validation no;' and the static-stub defs should work.
Bind 9.8+ using static-stub (preferred method, Debian Wheezy or newer)
zone "hack" { type static-stub; server-addresses { 172.31.255.53; }; }; zone "dn42" { type static-stub; server-addresses { 172.23.0.53; }; }; zone "20.in-addr.arpa" { type static-stub; server-addresses { 172.23.0.53; }; }; zone "22.in-addr.arpa" { type static-stub; server-addresses { 172.23.0.53; }; }; zone "23.in-addr.arpa" { type static-stub; server-addresses { 172.23.0.53; }; }; zone "31.172.in-addr.arpa" { type static-stub; server-addresses { 172.31.255.53; }; }; zone "100.10.in-addr.arpa" { type static-stub; server-addresses { 172.31.255.53; }; }; zone "101.10.in-addr.arpa" { type static-stub; server-addresses { 172.31.255.53; }; }; zone "102.10.in-addr.arpa" { type static-stub; server-addresses { 172.31.255.53; }; }; zone "103.10.in-addr.arpa" { type static-stub; server-addresses { 172.31.255.53; }; };
Bind as secondary
zone "hack" { type slave; file "slave/slave.hack"; masters { 172.31.0.5; }; };
Old Bind as Forwarder
zone "hack" { type forward; forwarders { 172.31.0.5; }; };
NSD + unbound
unbound and NSD were developed by NLnet Labs with focus on small footprints and reliability. While NSD is a complete name server software for authoritative zones only, they also provide unbound as caching and recursive resolver.
nsd
In /etc/nsd/nsd3.conf add at bottom:
zone: name: "hack" zonefile: "hack.zone" allow-notify: 127.0.0.1 NOKEY allow-notify: 172.31.0.5 NOKEY request-xfr: 172.31.0.5 NOKEY
unbound
In /etc/unbound/unbound.conf add at bottom:
forward-zone: name: "hack" forward-addr: 172.31.255.53 forward-zone: name: "dn42" forward-addr: 172.22.0.53
Make sure you allow private addresses to be returned (private-domain) and don't check signatures (DNSSEC, domain-insecure) for .hack and .dn42:
private-domain: "hack" domain-insecure: "hack" private-domain: "dn42" domain-insecure: "dn42"
maradns
maradns as secondary
getzone mycoolnode.hack 212.12.52.216 > /etc/maradns/db.domain.hack
Where mycoolnode.hack is the domain name, 212.12.52.216 is the primary name server and db.domain.hack is the filename of the zonefile.
pdns-recursor
Enable in /etc/powerdns/recursor.conf:
forward-zones-file=/etc/powerdns/forward-zones-file.conf
And create /etc/powerdns/forward-zones-file.conf with the following contents:
+hack=172.31.255.53 +31.172.in-addr.arpa=172.31.255.53 +100.10.in-addr.arpa=172.31.255.53 +101.10.in-addr.arpa=172.31.255.53 +102.10.in-addr.arpa=172.31.255.53 +103.10.in-addr.arpa=172.31.255.53 +dn42=172.22.0.53 +20.172.in-addr.arpa=172.22.0.53 +22.172.in-addr.arpa=172.22.0.53 +23.172.in-addr.arpa=172.22.0.53