From: Lynn Carol Johnson <lcj34@cornell.edu>
To: Rui DeSousa <rui@crazybean.net>
Cc: pgsql-admin@lists.postgresql.org <pgsql-admin@lists.postgresql.org>
Subject: Re: Postgres dying after many failed logins
Date: Mon, 8 Nov 2021 18:40:08 +0000
Message-ID: <08D323A4-CCE6-4626-8CD1-E33914CCBE9D@cornell.edu> (raw)
In-Reply-To: <A5BC5082-07CE-485A-B684-4B3127CCB76A@crazybean.net>
References: <58143128-71A6-4C51-9BCD-35105A385FA8@cornell.edu>
<A5BC5082-07CE-485A-B684-4B3127CCB76A@crazybean.net>
Thank you for the feedback.
We originally had this setup as a test, and we were connecting to the db from outside. Once the test scenario became something more permanent we neglected to fix access rights. Currently all access should be from a docker GUI which is run on that AWS instance, so I agree it shouldn’t be available.
As you suggest, we’ve removed the postgres port from the AWS instance inbound rules and hoping this takes care of it . Thanks again – I’m new to AWS and postgres setup so am making mistakes, but learning.
From: Rui DeSousa <rui@crazybean.net>
Date: Monday, November 8, 2021 at 12:33 PM
To: Lynn Carol Johnson <lcj34@cornell.edu>
Cc: "pgsql-admin@lists.postgresql.org" <pgsql-admin@lists.postgresql.org>
Subject: Re: Postgres dying after many failed logins
On Nov 8, 2021, at 7:45 AM, Lynn Carol Johnson <lcj34@cornell.edu<mailto:lcj34@cornell.edu>> wrote:
2021-11-05 14:35:09.197 UTC [1451469] LOG: received smart shutdown request
2021-11-05 14:35:09.222 UTC [1451660] postgres@breedbase FATAL: terminating connection due to administrator command
That does not look like PostgreSQL crashed but is being shutdown by RDS services due to a DOS attack.
Two things;
1. A firewall should be blocking the incoming rouge traffic to protect the given server; otherwise the system is open to a DOS attack.
2. Why is PostgreSQL accessible on the internet? Normally DB servers are at least 3 deep from the internet and only internal trusted nodes should be connecting to the database.
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To: pgsql-admin@postgresql.org
Cc: lcj34@cornell.edu, rui@crazybean.net, pgsql-admin@lists.postgresql.org
Subject: Re: Postgres dying after many failed logins
In-Reply-To: <08D323A4-CCE6-4626-8CD1-E33914CCBE9D@cornell.edu>
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