Sorry, bit laid up and typing with one hand, but luckily all the top
three publicly list their IP(s), unfortunately they do it via web URLs'
that you need to parse instead of via say a rwhois entry.
(some are listed at various services you can query in RBL format such as
RATS-AZURE)
Some you can check via PTR naming conventions, and others you can do an
ASN lookup.
don't have the URL's handy, but welcome to reach out off list.
On 2021-06-04 4:08 p.m., Scott Mutter via mailop wrote:
On Fri, Jun 4, 2021 at 1:24 PM Michael Peddemors via mailop
<mailop@mailop.org <mailto:mailop@mailop.org>> wrote:
With apache, you can use modsecurity quite easily, and you can block
all
azure (and other cloud providers ranges) from certain services like
wordpress, or contact forms etc.. (you can even do dns based checks or
rbldnsd) ..
Are there any links for this? AFAIK mod_security is just a module - to
actually do anything it requires a ruleset. Further from that, how does
it determine what is Azure and what is not? Is it just blocking IP
addresses? Seems you'd need a list of all of the Azure IP address
space. And from what I have seen the offending IPs are all over the place:
157.55.39.138
207.46.13.5
20.83.33.136
20.94.247.9
40.124.141.27
40.124.141.27
40.124.193.244
40.76.220.206
Are just a few.
But if there's a way to block Azure and other cloud based services, I'd
be interested in that. But I'd suspect you'd need a list of all of
their IP address spaces - is that information available some where?
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