Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lsRfJ-0003OI-3E for pgsql-admin@arkaria.postgresql.org; Sun, 13 Jun 2021 15:04:45 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1lsRfH-0000te-K2 for pgsql-admin@arkaria.postgresql.org; Sun, 13 Jun 2021 15:04:43 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lsRfH-0000sw-B8 for pgsql-admin@lists.postgresql.org; Sun, 13 Jun 2021 15:04:43 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lsRfC-0005fS-Tk for pgsql-admin@postgresql.org; Sun, 13 Jun 2021 15:04:43 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.15.2/8.15.2) with ESMTP id 15DF4Z5M050174; Sun, 13 Jun 2021 11:04:35 -0400 From: Tom Lane To: pramod kg cc: pgsql-admin@postgresql.org Subject: Re: PostgreSQL SSL params In-reply-to: References: Comments: In-reply-to pramod kg message dated "Sun, 13 Jun 2021 19:50:45 +0530" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <50172.1623596675.1@sss.pgh.pa.us> Date: Sun, 13 Jun 2021 11:04:35 -0400 Message-ID: <50173.1623596675@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk pramod kg writes: > I have enabled ssl on my PG servers and have set ssl_cipher to "HIGH". > Still, the security team complains that weak ciphers are accepted at server > side (They have run some security tests). The default setting of that is #ssl_ciphers = 'HIGH:MEDIUM:+3DES:!aNULL' # allowed SSL ciphers Perhaps the problem is your ill-advised removal of the !aNULL part. regards, tom lane