> there is no "min" version in Client Hello, the version in record layer is irrelevant and used only for backwards compatibility *NOT* for negotiation Thank you for the information. But have a doubt, then what is the importance of SSL_CTX_set_min_proto_version() and SSL_CTX_set_max_proto_version() introduced in 1.1.X along with SSL_CTX_set_options(). I would like to know how to disable TLSv1.0 and 1.1 using configure option[CONFOPTS] in Makefile. Thanks in advance, Chethan Kumar -----Original Message----- From: Hubert Kario [mailto:hkario@xxxxxxxxxx] Sent: Thursday, April 11, 2019 7:08 PM To: openssl-users@xxxxxxxxxxx Cc: Chethan Kumar <Chethan.Kumar@xxxxxxxxxxxxxxxx> Subject: Re: How to disable tls 1.0 and tls 1.1 On Thursday, 11 April 2019 15:25:51 CEST Chethan Kumar wrote: > Adding to previous mail, > We tried -DSSL_OP_NO_TLSv1 -DSSL_OP_NO_TLSv1_1 along with disabling SSLv2 > and v1 but still client hello is sent using min and max as TLS1.0 and > TLS1.2. there is no "min" version in Client Hello, the version in record layer is irrelevant and used only for backwards compatibility *NOT* for negotiation > Any idea what is wrong in our options and what should be used instead.? compile an openssl server with TLS 1.1 enabled, run openssl s_server -tls1_1 to enable just TLS 1.1 and see if your production compile can connect > Thanks in advance, > Chethan Kumar > > From: openssl-users [mailto:openssl-users-bounces@xxxxxxxxxxx] On > Behalf Of Chethan Kumar Sent: Thursday, April 11, 2019 4:25 PM > To: openssl-users@xxxxxxxxxxx > Subject: How to disable tls 1.0 and tls 1.1 > > Dear all, > > Kindly help me out in knowing how to disable TLS1.0 and TLS1.1 while > compiling openssl package. I am using 1.0.2n openssl version and > disabled > SSLv1 and v2 using -DSSL_OP_NO_SSLv2, -DOPENSSL_NO_SSL3 and > -DOPENSSL_NO_SSL2. > > I also have a doubt on difference between -DSSL_OP_NO_SSLv2, > -DOPENSSL_NO_SSL3 and -DOPENSSL_NO_SSL2. Can someone please explain > the difference. > > Thanks in advance, > Chethan Kumar > > > The information contained in this e-mail message and in any > attachments/annexure/appendices is confidential to the recipient and > may contain privileged information. If you are not the intended > recipient, please notify the sender and delete the message along with > any attachments/annexure/appendices. You should not disclose, copy or > otherwise use the information contained in the message or any > annexure. Any views expressed in this e-mail are those of the > individual sender except where the sender specifically states them to > be the views of Toshiba Software India Pvt. Ltd. (TSIP),Bangalore. > Although this transmission and any attachments are believed to be free > of any virus or other defect that might affect any computer system > into which it is received and opened, it is the responsibility of the > recipient to ensure that it is virus free and no responsibility is > accepted by Toshiba Software India Pvt. Ltd, for any loss or damage > arising in any way from its use. The information contained in this > e-mail message and in any attachments/annexure/appendices is > confidential to the recipient and may contain privileged information. > If you are not the intended recipient, please notify the sender and > delete the message along with any attachments/annexure/appendices. You > should not disclose, copy or otherwise use the information contained > in the message or any annexure. Any views expressed in this e-mail are > those of the individual sender except where the sender specifically > states them to be the views of Toshiba Software India Pvt. Ltd. > (TSIP),Bangalore. > > Although this transmission and any attachments are believed to be free > of any virus or other defect that might affect any computer system > into which it is received and opened, it is the responsibility of the > recipient to ensure that it is virus free and no responsibility is > accepted by Toshiba Embedded Software India Pvt. Ltd, for any loss or > damage arising in any way from its use. -- Regards, Hubert Kario Senior Quality Engineer, QE BaseOS Security team Web: www.cz.redhat.com Red Hat Czech s.r.o., Purkyňova 115, 612 00 Brno, Czech Republic The information contained in this e-mail message and in any attachments/annexure/appendices is confidential to the recipient and may contain privileged information. If you are not the intended recipient, please notify the sender and delete the message along with any attachments/annexure/appendices. You should not disclose, copy or otherwise use the information contained in the message or any annexure. Any views expressed in this e-mail are those of the individual sender except where the sender specifically states them to be the views of Toshiba Software India Pvt. Ltd. (TSIP),Bangalore. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by Toshiba Embedded Software India Pvt. Ltd, for any loss or damage arising in any way from its use.
