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-rw-r--r--doc/check-certificates.md5
1 files changed, 3 insertions, 2 deletions
diff --git a/doc/check-certificates.md b/doc/check-certificates.md
index 80f6aee..f295117 100644
--- a/doc/check-certificates.md
+++ b/doc/check-certificates.md
@@ -34,8 +34,9 @@ in `global-config-overlay`, these are the parameters:
* `CertRenewUrl`: the url to download certificates from
* `CertWarnTime`: on what remaining time to warn via notification
-Certificates on the web server should be named `CN.pem` (`PEM` format) or
-`CN.p12` (`PKCS#12` format).
+Certificates on the web server should be named by their common name, like
+`CN.pem` (`PEM` format) or`CN.p12` (`PKCS#12` format). Alternatively any
+subject alternative name (aka *Subject Alt Name* or *SAN*) can be used.
Also notification settings are required for
[e-mail](mod/notification-email.md),