Difference between revisions of "ChaosVPN:DNS"

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We have a DNS running.
+
[[ChaosVPN|Back]]
 +
 
 +
{{Template:ChaosVPNBanner}}
 +
 
 +
We have a DNS running (or not).
 +
 
 +
= 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 =
 
= configs =
Line 5: Line 13:
 
The main zonefile atm is edited with vim on cvpn-dns.
 
The main zonefile atm is edited with vim on cvpn-dns.
  
This server is available at 172.31.0.5 or 212.12.52.216.  
+
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 ==
  
You can either be secondary and transfer the zonefile or query this server.
+
Add to /etc/dnsmasq.conf:
  
If you are a secondary you need to add your server here so it can be included in the zonefile.
+
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=/dn42/172.23.0.53
 +
server=/20.172.in-addr.arpa/172.23.0.53
 +
server=/21.172.in-addr.arpa/172.23.0.53
 +
server=/22.172.in-addr.arpa/172.23.0.53
 +
server=/23.172.in-addr.arpa/172.23.0.53
  
= secondarys =
+
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:
  
* ns.sliepen.hack (172.31.116.1)
+
rebind-domain-ok=hack
* ns1.syn2cat.hack (195.24.78.86 and 2a01:608:ccc::ccc)
+
rebind-domain-ok=31.172.in-addr.arpa
* ns1.crest.dn42 (172.22.228.6) with 1Mbit/s upstream, ns2.crest.dn42 (172.22.228.85) and ns3.crest.dn42 (172.22.228.84) with 100Mbit/s upstream
+
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=21.172.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 "21.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; };
 +
  };
  
= HowTo=
 
  
  
Line 43: Line 148:
 
   forward-zone:
 
   forward-zone:
 
   name: "hack"
 
   name: "hack"
   forward-addr: 172.31.0.5
+
   forward-addr: 172.31.255.53
  forward-addr: 172.31.116.1
 
 
   forward-zone:
 
   forward-zone:
 
   name: "dn42"
 
   name: "dn42"
   forward-addr: 172.22.228.85
+
   forward-addr: 172.23.0.53
  forward-addr: 172.22.222.6
 
  
 +
Make sure you allow private addresses to be returned (private-domain) and don't check signatures (DNSSEC, domain-insecure) for .hack and .dn42:
  
== bind9 ==
+
  private-domain: "hack"
 +
  domain-insecure: "hack"
 +
  private-domain: "dn42"
 +
  domain-insecure: "dn42"
  
Should-Do´s:
+
== maradns ==
  
in /etc/bind/named.conf:
+
=== maradns as secondary ===
 
 
=== Bind as secondary ===
 
 
 
  zone "hack" in{
 
    type slave;
 
    file "slave/slave.hack";
 
    masters {172.31.0.5;};
 
  };
 
  
=== Bind as Forwarder ===
+
  getzone mycoolnode.hack 212.12.52.216 > /etc/maradns/db.domain.hack
  
  zone "hack" in{
+
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.
    type forward;
 
    forwarders {172.31.0.5; 172.31.116.1;}; };
 
  };
 
 
 
== maradns ==
 
 
 
=== maradns as secondary ===
 
  
  getzone domain.hack 212.12.52.216 > /etc/maradns/db.domain.hack
 
  
Where '''domain.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:
  
== dnsmasq for OpenWRT ==
+
forward-zones-file=/etc/powerdns/forward-zones-file.conf
edit
 
  
/etc/dnsmasq.conf
+
And create /etc/powerdns/forward-zones-file.conf with the following contents:
  
  # Tells dnsmasq to forward anything with the domain of .hack to dns server 172.31.0.5
+
  +hack=172.31.255.53
  server=/.hack/172.31.0.5
+
  +31.172.in-addr.arpa=172.31.255.53
   
+
+100.10.in-addr.arpa=172.31.255.53
  # Listen to requests only coming from the local machine
+
  +101.10.in-addr.arpa=172.31.255.53
  listen-address=127.0.0.1
+
  +102.10.in-addr.arpa=172.31.255.53
   
+
  +103.10.in-addr.arpa=172.31.255.53
  # Do not cache anything
+
+dn42=172.23.0.53
  # A decent dns server will already cache for your local network
+
  +20.172.in-addr.arpa=172.23.0.53
  cache-size=0
+
  +21.172.in-addr.arpa=172.23.0.53
 +
  +22.172.in-addr.arpa=172.23.0.53
 +
  +23.172.in-addr.arpa=172.23.0.53
  
and <br>
 
/etc/resolv.conf
 
  
# Local LAN Domain
+
[[Category:ChaosVPN]]
domain fonera
 
 
# local dnsmasq server
 
nameserver 127.0.0.1
 
 
# Your main dns server (dnsmasq will forward all requests to this server) 208.67.222.222 OpenDNS
 
nameserver 208.67.222.222
 

Latest revision as of 11:54, 26 April 2021

Back

Note:
ChaosVPN is a VPN to connect Hackers and Hackerspaces - it does NOT provide anonymous internet access!
For this look at tor or other similar services.

It will also not help you to reach domains like .rdos, .lll, .clos or any other strange things supposed to be available on the "dark web".

Alternative: If you prefer BGP, you can also connect via https://dn42.net/, we are interconnected.

We have a DNS running (or not).

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=/dn42/172.23.0.53
server=/20.172.in-addr.arpa/172.23.0.53
server=/21.172.in-addr.arpa/172.23.0.53
server=/22.172.in-addr.arpa/172.23.0.53
server=/23.172.in-addr.arpa/172.23.0.53

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=21.172.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 "21.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: 172.23.0.53

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=172.23.0.53
+20.172.in-addr.arpa=172.23.0.53
+21.172.in-addr.arpa=172.23.0.53
+22.172.in-addr.arpa=172.23.0.53
+23.172.in-addr.arpa=172.23.0.53