IP addresses from URLs

To blockout junk I can use the Firewall, but this requires IP
addresses instead of URLs.

Is there some surefire method to extract IP addresses from URLs?
Preferably at the doamain level.

On 09/01/2020 22:06, Peter Jason wrote:



Is there some surefire method to extract IP addresses from URLs?
Preferably at the doamain level.

Sure there is a way. Launch your cmd prompt and type something like:

ping microsoft.com

or

ping google.com

You'll get the IP address of those two domains.

The IP addresses of Microsoft and Google are country specific so
Australia may have something else. UK has: 40.113.200.201 for Microsoft
on my machine and Google: 216.58.210.46

However, they have hundreds if not thousands for different things.

ping Some_Domain.com








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Peter Jason wrote:


To blockout junk I can use the Firewall, but this requires IP
addresses instead of URLs.

Is there some surefire method to extract IP addresses from URLs?
Preferably at the doamain level.

DNS; but it gets messy if there are multiple IP addresses to a URL (such
as facebook.com).

Perhaps look into a DNS service that can help you there, such as opendns
or pihole (among others).


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On 2020-01-09 4:06 p.m., Peter Jason wrote:


To blockout junk I can use the Firewall, but this requires IP
addresses instead of URLs.

Is there some surefire method to extract IP addresses from URLs?
Preferably at the doamain level.


How about *ping* in a command line? as in "ping amazon.com" .

Rene

On Thu, 9 Jan 2020 19:36:05 -0600, Rene Lamontagne
wrote:

On 2020-01-09 4:06 p.m., Peter Jason wrote:


To blockout junk I can use the Firewall, but this requires IP
addresses instead of URLs.

Is there some surefire method to extract IP addresses from URLs?
Preferably at the doamain level.


How about *ping* in a command line? as in "ping amazon.com" .

Rene

Thanks to all, I seem to have blocked some odious websites
successfully.

On Fri, 10 Jan 2020 09:06:20 +1100, Peter Jason wrote:

To blockout junk I can use the Firewall, but this requires IP
addresses instead of URLs.

Is there some surefire method to extract IP addresses from URLs?
Preferably at the doamain level.


If the domain is (say) "www.itisatrap.org", then open a Command Prompt
window and type this command

nslookup -type=A www.itisatrap.org

The results will look something like this

Server: UnKnown
Address: 192.168.43.1 --- Not this IP Address. This is your DNS server.

Non-authoritative answer:
Name: www.itisatrap.org
Address: 54.206.17.186 --- This IP address is www.itisatrap.org

Some domains have multiple IP addresses. If you run the same command
several minutes later, you may get a different IP address. This makes
it messy to do what you want (as Dan has already replied).


There are web sites that will look up the IP address from the domain
for you. In some cases the answer they give is not surefire for you.

For example, from here the IP address of "download.microsoft.com" is
125.252.212.104 (the server nearest to me in New Zealand).
But if I use the web site https://dnschecker.org/all-dns-records-of-domain.php
to look up the IP address of "download.microsoft.com", it will tell
me that the IP address is 23.52.161.62 (a server in New York, NY, USA).

Some domains like "download.microsoft.com" have servers dotted around
the world. You get the IP address of the server closest to you. But
when you use a web site like https://dnschecker.org/all-dns-records-of-domain.php
it will tell you the IP address of the server closest to it (not to you).


--
Kind regards
Ralph

On Fri, 10 Jan 2020 09:06:20 +1100, Peter Jason wrote:



To blockout junk I can use the Firewall, but this requires IP
addresses instead of URLs.

Is there some surefire method to extract IP addresses from URLs?
Preferably at the doamain level.

In addition to what the other responders said, note that the IP address of
a particular domain, microsoft.com for example, is very frequently
different from the IP address of its various subdomains, such as
download.microsoft.com. As a result, blocking the domain IP will usually
not successfully block any or most of its subdomains.

By the way, the tool I would use to resolve FQDNs to IP addresses is dig.
Dig is available for Windows.