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pages/yubikey: add warning about online auth method

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w4tsn 2023-02-26 11:52:18 +01:00
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modules/ROOT/pages/using-yubikeys.adoc
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@ -1,7 +1,7 @@
= Using YubiKeys with Fedora
The Fedora docs team
:revnumber: unknown
:revdate: 2023-02-12
:revdate: 2023-02-26
:category: Using
// :tags: From Source
@ -68,6 +68,11 @@ auth sufficient pam_yubico.so id=[Your API Client ID] key=[Your API Cl
Note that the key is optional but without it there is no TLS verification which makes this susceptible to MitM attacks by default. Obtain a key at https://upgrade.yubico.com/getapikey[Yubico].
====
[CAUTION]
====
Note that the online auth method won't work if the device is offline and can't reach the YubiCloud.
====
[NOTE]
====
If you have SELinux on the enforcing mode (the default mode), you should flip on the allow_ypbind boolean first, because pam_yubico needs to be able to connect to Yubico's online authentication. servers.