Is there a way to get all IP addresses of youtube to block it with Windows Firewall?

The way to find all the IP addresses associated with a URL is first to find the AS Number, you can get it in http://networktools.nl/asinfo/ For YouTube get it in http://networktools.nl/asinfo/youtube.com There you get the AS Number

Primary ASN : 15169

Now, type in terminal

whois -h whois.radb.net -- '-i origin AS15169' | grep ^route

And there you will get all the IP Addresses, the list is long but you can find similar addresses that can be grouped in a subnet.


youtube current address list is

  • 64.18.0.0/20
  • 64.233.160.0/19
  • 66.102.0.0/20
  • 66.249.80.0/20
  • 72.14.192.0/18
  • 74.125.0.0/16
  • 173.194.0.0/16
  • 207.126.144.0/20
  • 209.85.128.0/17
  • 216.58.208.0/20
  • 216.239.32.0/19

If you have your own DNS server you can block domains from resolving. Here is a guide to block domains in Bind DNS server.

To get all the IP addresses there is no way. What you can do is, install dig. It's available in linux but not in windows.

Then time to time enter dig youtube.com. It'll show you all the resolved IPs from DNS cache.

See my result

$ dig youtube.com A

; <<>> DiG 9.7.0-P1 <<>> youtube.com A
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13442
;; flags: qr rd ra; QUERY: 1, ANSWER: 16, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;youtube.com.                   IN      A

;; ANSWER SECTION:
youtube.com.            83      IN      A       74.125.235.47
youtube.com.            83      IN      A       74.125.235.46
youtube.com.            83      IN      A       74.125.235.45
youtube.com.            83      IN      A       74.125.235.44
youtube.com.            83      IN      A       74.125.235.43
youtube.com.            83      IN      A       74.125.235.42
youtube.com.            83      IN      A       74.125.235.41
youtube.com.            83      IN      A       74.125.235.40
youtube.com.            83      IN      A       74.125.235.39
youtube.com.            83      IN      A       74.125.235.38
youtube.com.            83      IN      A       74.125.235.37
youtube.com.            83      IN      A       74.125.235.36
youtube.com.            83      IN      A       74.125.235.35
youtube.com.            83      IN      A       74.125.235.34
youtube.com.            83      IN      A       74.125.235.33
youtube.com.            83      IN      A       74.125.235.32

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Feb 18 22:26:58 2012
;; MSG SIZE  rcvd: 285

Tags:

Ip

Firewall

Windows Firewall

Blocking

Youtube

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