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Mozilla Firefox does not work when disabling the encryption key TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)

Dear Mozilla team, We are a company that develops web systems. The customer’s security service asks us to close all old encryption keys on the server in order to avoid sy… (Lesen Sie mehr)

Dear Mozilla team,

We are a company that develops web systems. The customer’s security service asks us to close all old encryption keys on the server in order to avoid system vulnerabilities and use only new keys. We disabled most of the old keys and the system works fine on all browsers. As soon as we turn off the encryption key TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014), then all web systems stop working through the Mozilla Firefox browser. (At the same time, everything works correctly on other browsers). The Mozilla Firefox Documentation says that this browser supports new encryption keys and can work without old encryption keys. Link (https://wiki.mozilla.org/Security/Server_Side_TLS). Also on our server are included all the necessary encryption keys for Mozilla Firefox to work.

Do you have any ideas on how to solve this?

Gefragt von yulyan.karpiy vor 3 Monaten

Letzte Antwort von dkeeler vor 2 Monaten

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Can't enable TLS 1.3

I have downloaded both the Nightly and Firefox Dev Edition but non of them can enable TLS 1.3 I have use "about:config" to config the tls max version to "4" (which should… (Lesen Sie mehr)

I have downloaded both the Nightly and Firefox Dev Edition but non of them can enable TLS 1.3

I have use "about:config" to config the tls max version to "4" (which should be TLS1.3 supported) but nothing happens. I try the https://nghttp2.org:13443/ (which is TLS1.3 supported if I connect it by openssl directly).

Gefragt von yctung vor 2 Jahren

Letzte Antwort von cor-el vor 2 Jahren