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Force TLSv1.2 or higher

Created by dave. Last edited by dave, 4 years and 30 days ago. Viewed 799 times. #2
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ASA still responding to, and using, protocols less than TLS1.2.

AKA: SSLv2 and SSLv3 are still being used, which is bad.


# config
(config)# ssl server-version tlsv1.2
(config)# ssl client-version tlsv1.2
(config)# exit


  • The source page (dated 2019-03) suggests that ASDM may be unhappy if TLSv1 is turned off, however I'm running ASA 9.8(4)15 with ASDM 7.10.1 and it all appears to be working for me.
  • It will fuck up AnyConnect v3.1 and below clients, if you are unfortunate enough to be still running those.
  • I am pretty sure that by doing this, SSLv2 and SSLv3 are both disabled -- but you'd better research that for yourself instead of just trusting some rando on the internet. There are lots of links out there suggesting that SSLv3 can't be disabled for… some reason.


Based on >>this community page

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