I disable NetworkManager and use systemd-netword instead though. It is possible to set up separate DNS servers for separate networks (domains). You should see a TLS-encryped exchange between your computer and your configured DNS server: You need to flush the local DNS caches before you can capture a DNS query: $ sudo resolvectl flush-caches Set up a filter in Wireshark like tcp.port = 853 (853 is the DNS over TLS protocol port). In my case, because I use a wireless interface, I will go ahead with wlp58s0.
It will ask you which link device it have to begin capturing packets on.
Information acquired via protocol DNS in 36.3ms.īONUS Step 5 : Use Wireshark to verify the configurationįirst, install and run Wireshark: $ sudo dnf install wireshark To make a secure query, run: $ resolvectl query į: 8.43.85.67 - link: wlp58s0 State Recv-Q Send-Q Local Address:Port Peer Address:Port Process To see the address and port that systemd-resolved is sending and receiving secure queries on, run: $ sudo ss -lntp | grep '\(State\|:53 \)' etc/nf should point to 127.0.0.53 $ cat /etc/nf Confirm this by checking DNS resolution status with: $ resolvectl status There are plans to enable systemd-resolved by default in Fedora 33.
NOTE: Currently, the systemd-resolved service is disabled by default and its use is opt-in. Then restart NetworkManager.ĬAUTION: This will lead to a loss of connection for a few seconds while NetworkManager is restarting.
To make the settings configured in the previous steps take effect, start and enable systemd-resolved.
This is fine on a trusted network, but feel free to set dns=none instead to use the DNS servers configured in /etc/systemd/nf. This will override the DNS settings configured in Step 1. The setting shown above ( dns=systemd-resolved) will cause NetworkManager to push DNS information acquired from DHCP to the systemd-resolved service. Step 2 : Tell NetworkManager to push info to systemd-resolvedĬreate a file in /etc/NetworkManager/conf.d named nf. You should decide which DNS servers you want to use being mindful of whom you are asking IPs for internet navigation. NOTE: The DNS servers listed in the above example are my personal choices. Note that this mode requires a DNS server that supports DNS-over-TLS and has a valid certificate for it’s IP.
This guide will demonstrate how to configure DNS over TLS on Fedora using systemd-resolved. On Fedora, the steps to implement these technologies are easy and all the necessary tools are readily available. DNS over TLS and DNSSEC allow safe and encrypted end-to-end tunnels to be created from a computer to its configured DNS servers. Luckily, DNS over TLS and DNSSEC are available. It also allows ISPs to intercept the queries. It is exposed to security risks and attacks like DNS Hijacking. The Domain Name System (DNS) that modern computers use to find resources on the internet was designed 35 years ago without consideration for user privacy.