{"id":2986,"date":"2020-02-20T01:00:11","date_gmt":"2020-02-20T00:00:11","guid":{"rendered":"https:\/\/www.linuxboxen.dk\/?p=2986"},"modified":"2020-02-20T01:00:11","modified_gmt":"2020-02-20T00:00:11","slug":"dig-en-ip-adresse","status":"publish","type":"post","link":"https:\/\/www.linuxboxen.dk\/?p=2986","title":{"rendered":"dig en ip adresse."},"content":{"rendered":"

Dig er ikke en mods\u00e6tning til nslookup i funktion, men med meget flere muligheder, giver dig-kommandoen oplysninger, som navneservere administrerer og kan v\u00e6re meget nyttige til fejlfinding af problemer. Det er b\u00e5de let at bruge og har mange nyttige indstillinger.<\/p>\n

Navnet “dig” st\u00e5r for “domain information groper”.
\nM\u00e6ngden af information, den giver, afh\u00e6nger af en r\u00e6kke indstillinger, som du kan bruge til at skr\u00e6ddersy dens output til dine behov. dig kan give en masse detaljer eller v\u00e6re overraskende sparsom.<\/p>\n

Giv mig bare ip adressen.<\/h3>\n
$ dig facebook.com +short\n31.13.72.36<\/pre>\n
Som vist her.<\/p>\n
$ dig networkworld.com +short\n151.101.2.165\n151.101.66.165\n151.101.130.165\n151.101.194.165<\/pre>\n
Du skal ikke blive forvirret over du f\u00e5 flere ip adresser vist. Det skyldes at der bruges flere ip adresser som load balancer.<\/p>\n
$ dig networkworld.com\n\n; <<>> DiG 9.10.3-P4-Ubuntu <<>> networkworld.com\n;; global options: +cmd\n;; Got answer:\n;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28653\n;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1\n\n;; OPT PSEUDOSECTION:\n; EDNS: version: 0, flags:; udp: 4000\n;; QUESTION SECTION:\n;networkworld.com. IN A\n\n;; ANSWER SECTION:\nnetworkworld.com. 129 IN A 151.101.66.165\nnetworkworld.com. 129 IN A 151.101.130.165\nnetworkworld.com. 129 IN A 151.101.194.165\nnetworkworld.com. 129 IN A 151.101.2.165\n\n;; Query time: 0 msec\n;; SERVER: 127.0.1.1#53(127.0.1.1)\n;; WHEN: Tue Feb 18 09:38:45 CET 2020\n;; MSG SIZE rcvd: 109<\/pre>\n
Hvilken DNS server bruges.<\/h3>\n
Default bruger den de navne servere som du har beskrevet i \/etc\/resolv.conf filen.<\/p>\n
Her bruger vi google dns server til at sp\u00f8rge.<\/p>\n
dig @8.8.8.8 networkworld.com\n\n; <<>> DiG 9.10.3-P4-Ubuntu <<>> @8.8.8.8 networkworld.com\n; (1 server found)\n;; global options: +cmd\n;; Got answer:\n;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8109\n;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1\n\n;; OPT PSEUDOSECTION:\n; EDNS: version: 0, flags:; udp: 512\n;; QUESTION SECTION:\n;networkworld.com. IN A\n\n;; ANSWER SECTION:\nnetworkworld.com. 299 IN A 151.101.66.165\nnetworkworld.com. 299 IN A 151.101.130.165\nnetworkworld.com. 299 IN A 151.101.194.165\nnetworkworld.com. 299 IN A 151.101.2.165\n\n;; Query time: 240 msec\n;; SERVER: 8.8.8.8#53(8.8.8.8)\n;; WHEN: Tue Feb 18 09:42:56 CET 2020\n;; MSG SIZE rcvd: 109<\/pre>\n
For kun at f\u00e5 svar af dette svar, kan du udelade detaljer om navneserveren, men stadig f\u00e5 det svar, du leder efter, ved at bruge b\u00e5de en + noall<\/strong> (ikke vise alt) og et +answer<\/strong> (men vis svardelen ) s\u00e5dan her:<\/p>\n
$ dig @8.8.8.8 networkworld.com +noall +answer\n\n; <<>> DiG 9.10.3-P4-Ubuntu <<>> @8.8.8.8 networkworld.com +noall +answer\n; (1 server found)\n;; global options: +cmd\nnetworkworld.com.\t299\tIN\tA\t151.101.130.165\nnetworkworld.com.\t299\tIN\tA\t151.101.194.165\nnetworkworld.com.\t299\tIN\tA\t151.101.66.165\nnetworkworld.com.\t299\tIN\tA\t151.101.2.165<\/pre>\n
For at bruge dig med flere dom\u00e6ner, hvis du har en fil med navne kan du bruge -f parameteren.<\/p>\n
$ dig +noall +answer -f domainfil.txt<\/pre>\n
networkworld.com.       300     IN      A       151.101.66.165\nnetworkworld.com.       300     IN      A       151.101.2.165\nnetworkworld.com.       300     IN      A       151.101.130.165\nnetworkworld.com.       300     IN      A       151.101.194.165\nworld.std.com.          77972   IN      A       192.74.137.5\nuushenandoah.org.       1982    IN      A       162.241.24.209\namazon.com.             18      IN      A       176.32.103.205\namazon.com.             18      IN      A       176.32.98.166\namazon.com.             18      IN      A       205.251.242.103<\/pre>\n
Det kan ikke bruges til s\u00e5 meget. Men hvis du bruger awk til at f\u00e5 ip adresserne ud giver det mening.<\/p>\n
$ dig +noall +answer -f domainfil.txt | awk '{print $1,$NF}'\nnetworkworld.com. 151.101.66.165\nnetworkworld.com. 151.101.130.165\nnetworkworld.com. 151.101.194.165\nnetworkworld.com. 151.101.2.165\nworld.std.com. 192.74.137.5\namazon.com. 176.32.98.166\namazon.com. 205.251.242.103\namazon.com. 176.32.103.205<\/pre>\n
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Dig er ikke en mods\u00e6tning til nslookup i funktion, men med meget flere muligheder, giver dig-kommandoen oplysninger, som navneservere administrerer og kan v\u00e6re meget nyttige til fejlfinding af problemer. Det er b\u00e5de let at bruge og har mange nyttige indstillinger. Navnet “dig” st\u00e5r for “domain information groper”. M\u00e6ngden af information, den giver, afh\u00e6nger af en […]<\/p>\n
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