- Empezaremos a añadir las zonas de las que nuestro servidor tiene autoridad en el fichero
/etc/bind/named.conf.local, dejandolo tal que así (tener en cuenta que hay que descomentar la primera línea).
include "/etc/bind/zones.rfc1918";
zone "iesgn.org" {
type master;
file "db.iesgn.org";
};
zone "0.0.10.in-addr.arpa" {
type master;
file "db.0.0.10";
};
- Ahora definiremos los fichero
db.iesgn.org y db.0.0.10 dentro de /var/cache/bind/ vamos primero con la zona directa:
$TTL 86400
@ IN SOA alegv.iesgn.org. admin.iesgn.org. (
24367 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
86400 ) ; Negative Cache TTL
;
@ IN NS alegv.iesgn.org.
@ IN MX 10 correo.iesgn.org.
$ORIGIN iesgn.org.
alegv IN A 10.0.0.10
correo IN A 10.0.0.200
ftp IN A 10.0.0.201
www IN CNAME alegv
departamentos IN CNAME alegv
- Una vez definida la zona directa, vamos con la inversa.
$TTL 86400
@ IN SOA alegv.iesgn.org. admin.iesgn.org. (
24367 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
86400 ) ; Negative Cache TTL
;
@ IN NS alegv.iesgn.org.
$ORIGIN 0.0.10.in-addr.arpa.
10 IN PTR alegv.iesgn.org.
200 IN PTR correo.iesgn.org.
201 IN PTR ftp.iesgn.org.
- Una vez definido terminada la configuración podemos comprobar si tenemos algún error de sintáxis mediante este comando.
vagrant@dns:~$ sudo named-checkconf
- Reiniciamos el servicio y nos dirigimos a nuestro cliente. Añadimos nuestro servidor al fichero
/etc/resolv.conf
nameserver 10.0.0.10
- Y ahora vamos a hacer las consultas necesarias.
iesgn, alegv y ftp
vagrant@cliente:~$ dig www.iesgn.org
; <<>> DiG 9.16.15-Debian <<>> www.iesgn.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6897
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 7d481ec88f3729b901000000618b8b80622467a8ffac1f1e (good)
;; QUESTION SECTION:
;www.iesgn.org. IN A
;; ANSWER SECTION:
www.iesgn.org. 86400 IN CNAME alegv.iesgn.org.
alegv.iesgn.org. 86400 IN A 10.0.0.10
;; Query time: 0 msec
;; SERVER: 10.0.0.10#53(10.0.0.10)
;; WHEN: Wed Nov 10 09:06:08 UTC 2021
;; MSG SIZE rcvd: 106
vagrant@cliente:~$ dig alegv.iesgn.org
; <<>> DiG 9.16.15-Debian <<>> alegv.iesgn.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31342
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 3c6bda8c4c49fcf201000000618b8bc7b5c6d0ad0c609972 (good)
;; QUESTION SECTION:
;alegv.iesgn.org. IN A
;; ANSWER SECTION:
alegv.iesgn.org. 86400 IN A 10.0.0.10
;; Query time: 0 msec
;; SERVER: 10.0.0.10#53(10.0.0.10)
;; WHEN: Wed Nov 10 09:07:19 UTC 2021
;; MSG SIZE rcvd: 88
vagrant@cliente:~$ dig ftp.iesgn.org
; <<>> DiG 9.16.15-Debian <<>> ftp.iesgn.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17031
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: e62c88ee400c76b301000000618b8c147057652ae93beb44 (good)
;; QUESTION SECTION:
;ftp.iesgn.org. IN A
;; ANSWER SECTION:
ftp.iesgn.org. 86400 IN A 10.0.0.201
;; Query time: 0 msec
;; SERVER: 10.0.0.10#53(10.0.0.10)
;; WHEN: Wed Nov 10 09:08:36 UTC 2021
;; MSG SIZE rcvd: 86
DNS con autoridad sobre la zona iesgn.org
vagrant@cliente:~$ dig ns iesgn.org
; <<>> DiG 9.16.15-Debian <<>> ns iesgn.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10824
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 2
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 97ab6afc044be94801000000618b8c345c97033a70ba5b1d (good)
;; QUESTION SECTION:
;iesgn.org. IN NS
;; ANSWER SECTION:
iesgn.org. 86400 IN NS alegv.iesgn.org.
;; ADDITIONAL SECTION:
alegv.iesgn.org. 86400 IN A 10.0.0.10
;; Query time: 0 msec
;; SERVER: 10.0.0.10#53(10.0.0.10)
;; WHEN: Wed Nov 10 09:09:08 UTC 2021
;; MSG SIZE rcvd: 102
Servidor de correo de iesgn.org
vagrant@cliente:~$ dig mx iesgn.org
; <<>> DiG 9.16.15-Debian <<>> mx iesgn.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12374
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 2
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: ce347491f677979901000000618b8c6b721ab4f8f595e621 (good)
;; QUESTION SECTION:
;iesgn.org. IN MX
;; ANSWER SECTION:
iesgn.org. 86400 IN MX 10 correo.iesgn.org.
;; ADDITIONAL SECTION:
correo.iesgn.org. 86400 IN A 10.0.0.200
;; Query time: 0 msec
;; SERVER: 10.0.0.10#53(10.0.0.10)
;; WHEN: Wed Nov 10 09:10:03 UTC 2021
;; MSG SIZE rcvd: 105
vagrant@cliente:~$ dig www.josedomingo.org
; <<>> DiG 9.16.15-Debian <<>> www.josedomingo.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34579
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 0d868a0123bf14d101000000618b8cb0615d33676ad353c3 (good)
;; QUESTION SECTION:
;www.josedomingo.org. IN A
;; ANSWER SECTION:
www.josedomingo.org. 515 IN CNAME endor.josedomingo.org.
endor.josedomingo.org. 515 IN A 37.187.119.60
;; Query time: 4 msec
;; SERVER: 10.0.0.10#53(10.0.0.10)
;; WHEN: Wed Nov 10 09:11:12 UTC 2021
;; MSG SIZE rcvd: 112
Una resolución inversa
vagrant@cliente:~$ dig -x 10.0.0.200
; <<>> DiG 9.16.15-Debian <<>> -x 10.0.0.200
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44123
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: 037baba9af33611301000000618b8cccb05f226be0cbc559 (good)
;; QUESTION SECTION:
;200.0.0.10.in-addr.arpa. IN PTR
;; ANSWER SECTION:
200.0.0.10.in-addr.arpa. 86400 IN PTR correo.iesgn.org.
;; Query time: 0 msec
;; SERVER: 10.0.0.10#53(10.0.0.10)
;; WHEN: Wed Nov 10 09:11:40 UTC 2021
;; MSG SIZE rcvd: 110