Jan Peter Alexander

Jan Peter Alexander

There is nothing certain than the uncertainty itself. Capture, learn and mitigate. Welcome!

Millions of Xerces’ invading armies were mostly defeated on the sea by the democratic city state Athens, and not by the mythical 300 Spartans!

Installing dnscrypt-proxy

$ sudo apt install dnscrypt-proxy

It will automatically runs and listen at 127.0.2.1:53.

Setting up Network Manager

Using static address

Network Manager configuration for static address

  • Method: Manual
  • DNS Servers: 127.0.2.1
  • Address Netmask Gateway
    x.x.x.x y.y.y.y z.z.z.z
  • [*] IPv4 is required for this connection

Using DHCP

Network Manager configuration for DHCP address

  • Method: Automatic(Only addresses)
  • DNS Servers: 127.0.2.1
  • [*] IPv4 is required for this connection

Periodically updating DNS list

Sometimes dnscrypt-proxy isn’t working. That’s because we have to periodically update the IP list. They dinamically change from time to time.

$ sudo wget https://raw.githubusercontent.com/jedisct1/dnscrypt-proxy/master/dnscrypt-resolvers.csv \
    -O /usr/share/dnscrypt-proxy/dnscrypt-resolvers.csv

Do this from time to time.

Troubleshooting

If you are not sure at what address dnscrypt-proxy runs, check systemd.

$ systemctl status -l dnscrypt-proxy
● dnscrypt-proxy.service - DNSCrypt proxy
   Loaded: loaded (/lib/systemd/system/dnscrypt-proxy.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2017-01-01 00:00:06 UTC; 16s ago
     Docs: man:dnscrypt-proxy(8)
 Main PID: 5963 (dnscrypt-proxy)
   CGroup: /system.slice/dnscrypt-proxy.service
           └─5963 /usr/sbin/dnscrypt-proxy --resolver-name=cisco

Jan 1 00:00:06 localhost dnscrypt-proxy[5963]: [WARNING] - [cisco] logs your activity - a different provider might be better a choice if privacy is a concern
Jan 1 00:00:06 localhost dnscrypt-proxy[5963]: [NOTICE] Starting dnscrypt-proxy 1.6.1
Jan 1 00:00:06 localhost dnscrypt-proxy[5963]: [INFO] Generating a new session key pair
Jan 1 00:00:06 localhost dnscrypt-proxy[5963]: [INFO] Done
Jan 1 00:00:06 localhost dnscrypt-proxy[5963]: [INFO] Server certificate #1463092899 received
Jan 1 00:00:06 localhost dnscrypt-proxy[5963]: [INFO] This certificate is valid
Jan 1 00:00:06 localhost dnscrypt-proxy[5963]: [INFO] Chosen certificate #1463092899 is valid from [2016-05-13] to [2017-05-13]
Jan 1 00:00:06 localhost dnscrypt-proxy[5963]: [INFO] Server key fingerprint is 0000:1111:2222:3333:4444:5555:6666:7777:8888:9999:AAAA:BBBB:CCCC:DDDD:EEEE:FFFF
Jan 1 00:00:06 localhost dnscrypt-proxy[5963]: [NOTICE] Proxying from 127.0.2.1:53 to x.x.x.x:443
Jan 1 00:00:06 localhost systemd[1]: Started DNSCrypt proxy.

See this line:

Jan 1 00:00:06 localhost dnscrypt-proxy[5963]: [NOTICE] Proxying from 127.0.2.1:53 to x.x.x.x:443

It tells you at which address and port dnscrypt-proxy listens for request.

Watch out! there are two DNS resolver run on your system. First is dnsmasq (default DNS cacher in most recent GNU/Linux that uses Network Manager). And second is dnscrypt-proxy. Their default IP. | dnsmasq | 127.0.1.1 | | dnscrypt-proxy | 127.0.2.1 |

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