Dnsmasq : Install2024/04/29 |
Install Dnsmasq which is the lightweight DNS forwarder and DHCP Server Software.
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[1] | Install Dnsmasq. |
root@dlp:~# apt -y install dnsmasq
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[2] | Configure Dnsmasq. |
root@dlp:~#
vi /etc/dnsmasq.conf # line 19 : uncomment # never forward plain names domain-needed # line 21 : uncomment # never forward addresses in the non-routed address spaces bogus-priv # line 53 : uncomment # query with each server strictly in the order in resolv.conf strict-order # line 67 : add if you need # query the specific domain name to the specific DNS server # the example follows means query [server.education] domain to the [10.0.0.10] server
server=/server.education/10.0.0.10
# line 116 : uncomment and specify network interfaces to bind interface= enp1s0
# line 134 : uncomment bind-interfaces # line 145 : uncomment to add domain name on hostname automatically expand-hosts # line 155 : add to set domain name
domain=srv.world
# change the link according to man page of systemd-resolved in order to avoid conflicting on 53 root@dlp:~# ln -fs /run/systemd/resolve/resolv.conf /etc/resolv.conf root@dlp:~# systemctl restart dnsmasq systemd-resolved |
[3] | For DNS records, add them in [/etc/hosts]. Then, Dnsmasq will answer to queries from clients. |
root@dlp:~#
vi /etc/hosts # add DNS entries 10.0.0.30 dlp.srv.world dlp 10.0.0.31 www.srv.world wwwroot@dlp:~# systemctl reload dnsmasq |
[4] | Verify Name or Address Resolution from a client host in your network. |
root@desktop:~#
vi /etc/netplan/01-netcfg.yaml # change DNS setting to refer to Dnsmasq Server
nameservers:
addresses: [10.0.0.30]
root@desktop:~#
root@desktop:~# netplan apply root@desktop:~# grep nameserver /run/systemd/resolve/resolv.conf nameserver 10.0.0.30 dig dlp.srv.world. ; <<>> DiG 9.18.24-0ubuntu5-Ubuntu <<>> dlp.srv.world. ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25017 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;dlp.srv.world. IN A ;; ANSWER SECTION: dlp.srv.world. 0 IN A 10.0.0.30 ;; Query time: 0 msec ;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP) ;; WHEN: Mon Apr 29 14:04:55 UTC 2024 ;; MSG SIZE rcvd: 58root@desktop:~# dig -x 10.0.0.30 ; <<>> DiG 9.18.24-0ubuntu5-Ubuntu <<>> -x 10.0.0.30 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20706 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;30.0.0.10.in-addr.arpa. IN PTR ;; ANSWER SECTION: 30.0.0.10.in-addr.arpa. 0 IN PTR dlp.srv.world. ;; Query time: 0 msec ;; SERVER: 127.0.0.53#53(127.0.0.53) (UDP) ;; WHEN: Mon Apr 29 14:05:39 UTC 2024 ;; MSG SIZE rcvd: 78 |
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