That should be it.

It looks like they moved their downloads to a subdomain and the new direct URL is on download.steinberg.net so I you are scripting and want the 2.3 version specifically:

https://download.steinberg.net/sdk_downloads/asiosdk2.3.zip

Maybe add this info to the asio/README.txt: https://github.com/pure-data/pure-data/tree/master/asio

ie. "You can download a specific version using https://download.steinberg.net/sdk_downloads/asiosdk#.#.zip" etc

On Aug 25, 2021, at 12:00 PM, pd-dev-request@lists.iem.at wrote:

Date: Wed, 25 Aug 2021 10:42:06 +0200
From: IOhannes m zmoelnig <zmoelnig@iem.at>
To: "pd-dev@lists.iem.at" <pd-dev@lists.iem.at>
Subject: [PD-dev] [ot] asiosdk2.3 gone from steinberg's website
Message-ID: <c98d37d7-fb61-659c-2525-ef74b6372356@iem.at>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

i just found out on the CI that since yesterday, steinberg obviously 
have removed the old asiosdk download? from their website.

apparently a newer version can be obtained from 
https://www.steinberg.net/asiosdk

mgdasr
IOhannes

? http://www.steinberg.net/sdk_downloads/asiosdk2.3.zip

--------
Dan Wilcox
@danomatika
danomatika.com
robotcowboy.com