The book Sending Emails - The Safe Way: An introduction to OpenPGP security is now available in both Amazon Kindle and Paperback format

Overview of the pools

The servers that are included in the pool responded during the last update. It excludes keyservers that aren't synching by excluding any keyserver which lacks more than 500 keys compared to keys.kfwebs.net. At the present time the information is updated twise a day.

x-hkp defaults to port 11371, and the same pool can be accessed using e.g. http://pool.sks-keyservers.net:11371

Some of the servers in the status list are duplicates as a result of peers pointing at different hostnames (e.g. hostname and pure IP address). They will only be included once in the actual pool.

pool.sks-keyservers.net

The primary pool. This includes both A (ipv4) and AAAA (ipv6) records based on a random selection of included servers

eu.pool.sks-keyservers.net

This includes A (ipv4), AAAA (ipv6) and SRV records based on the performance timing expressed in the SRV weights.

SRV Records

The pool _pgpkey-http._tcp.eu.pool.sks-keyservers.net contains SRV records with weights as found listed in the status list. The weights are based on performance measures from the vantage point of the sks-keyservers.net primary server and is a simple (int)(1/responsetime*100)

ipv6.pool.sks-keyservers.net

IPv6 enabled servers are included with AAAA records in the main pool, and an IPv6-only pool is available at ipv6.pool.sks-keyservers.net

ipv4.pool.sks-keyservers.net

Similarily an IPv4 only pool is available at ipv4.pool.sks-keyservers.net if anyone for some reason (broken IPv6) should have difficulties

subset.pool.sks-keyservers.net

This is a subset of the pool: At the moment it only includes servers updated to version 1.1.2

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