mirror of https://github.com/opnsense/docs
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
4.0 KiB
ReStructuredText
98 lines
4.0 KiB
ReStructuredText
==============
|
|
DNSCrypt-Proxy
|
|
==============
|
|
|
|
------------
|
|
Installation
|
|
------------
|
|
|
|
First of all, you have to install the dnscrypt-proxy plugin (os-dnscrypt-proxy) from the plugins view
|
|
reachable via :menuselection:`System --> Firmware --> Plugins`.
|
|
|
|
After a page reload you will get a new menu entry under **Services** for DNSCrypt-Proxy.
|
|
|
|
When you start the daemon, it looks for a list of public DNS server from here:
|
|
https://dnscrypt.info/public-servers
|
|
|
|
Depending on all settings below the list can be shortened to your choice, like only IPv4, or logging disabled.
|
|
The fastest two servers will be used for DNS queries.
|
|
|
|
----------------
|
|
General Settings
|
|
----------------
|
|
|
|
:Enable DNSCrypt-Proxy:
|
|
Enable and start DNSCrypt-Proxy.
|
|
:Listen Address:
|
|
Here you set the addresses and ports to listen on. Default is localhost and port 5353.
|
|
If you want it to listen to port 53 you must enable **Allow Privileged Ports**, especially
|
|
when the system itself should treat it as a resolver.
|
|
required when using this service as a standalone core DNS server.
|
|
:Allow Privileged Ports:
|
|
This allows the service to listen on ports below 1024, like 53.
|
|
:Max Client Connections:
|
|
How many clients are allowed to contact the daemon.
|
|
:Use IPv4 Servers:
|
|
Use IPv4 enabled servers.
|
|
:Use IPv6 Servers:
|
|
Only use IPv6 enabled servers.
|
|
:Use DNSCrypt Servers:
|
|
Include resolvers supporting DNSCrypt protocol in the decision process.
|
|
:Use DNS-over-HTTPS Servers:
|
|
Include resolvers supporting DNS-over-HTTPS in the decision process.
|
|
:Require DNSSEC:
|
|
Only use resolvers supporting DNSSEC protocol.
|
|
:Require NoLog:
|
|
Only use resolvers with disabled loggong.
|
|
:Require NoFilter:
|
|
Only use resolvers without filtering. Otherwise requests would also filtered for adult content or ad's.
|
|
:Force TCP:
|
|
Always use TCP to connect to upstream servers. This can be useful if you need to route everything
|
|
through Tor, otherwise keep it disabled.
|
|
:Proxy:
|
|
Use this to route all TCP connections to a local Tor node, format has to be like 127.0.0.1:9050
|
|
:Timeout:
|
|
How long a DNS query will wait for a response in milliseconds.
|
|
:Keepalive:
|
|
Keepalive for HTTP (HTTPS, HTTP/2) queries in seconds.
|
|
:Cert Refresh Delay:
|
|
Delay in minutes after which certificates are reloaded.
|
|
:Ephemeral Keys:
|
|
Create a new, unique key for every single DNS query. This may improve privacy but can also have a
|
|
significant impact on CPU usage.
|
|
:TLS Disable Session Tickets:
|
|
Disable TLS session tickets - increases privacy but also latency.
|
|
:Fallback Resolver:
|
|
This is a normal, non-encrypted DNS resolver, that will be only used for one-shot queries when
|
|
retrieving the initial resolvers list, and only if the system DNS configuration does not work.
|
|
:Block IPv6:
|
|
Immediately respond to IPv6-related queries with an empty response.
|
|
This makes things faster when there is no IPv6 WAN connectivity.
|
|
:Cache:
|
|
Enable a DNS cache to reduce latency and outgoing traffic.
|
|
:Cache Size:
|
|
Set the cache size.
|
|
:Cache Min TTL:
|
|
Minimum TTL for cached entries.
|
|
:Cache Max TTL:
|
|
Maximum TTL for cached entries.
|
|
:Cache Negative Min TTL:
|
|
Minimum TTL for negatively cached entries.
|
|
:Cache Negative Max TTL:
|
|
Maximum TTL for negatively cached entries.
|
|
|
|
-----------------------
|
|
Example: Standalone DNS
|
|
-----------------------
|
|
|
|
You can use the DNSCrypt-Proxy as a full-featured standalone DNS instead of Unbound or Dnsmasq.
|
|
This setup has the advantage that you do not need a forwarder solution for encrypting DNS requests
|
|
or the usage of DNSBL.
|
|
|
|
To do so go to **Services->Unbound DNS->General** and uncheck *Enable*. If you are using Dnsmasq
|
|
go to **Services->Dnsmasq DNS->Settings** and uncheck *Enable*. Now change to **Services->DNSCrypt-Proxy->Configuration**
|
|
and add the *Listen Address* 0.0.0.0:53 for the service to be considered as standalone by the core system.
|
|
|
|
Now you can go on with your configuration task, like choosing which servers to use, privacy policy or caching.
|
|
Also cloaking (overrides) or DNSBL can be used without any workarounds.
|