pveproxy: document newly added options

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

diff --git a/pveproxy.adoc b/pveproxy.adoc
index 4696d664aefd6fec71cf54df356230d6d8d5040e..8fc6195ae8c3740c0413328d7aa94ad418d9c7eb 100644 (file)
--- a/pveproxy.adoc
+++ b/pveproxy.adoc
@@ -117,9 +117,11 @@ effect.
 SSL Cipher Suite
 ----------------
 
-You can define the cipher list in `/etc/default/pveproxy`, for example
+You can define the cipher list in `/etc/default/pveproxy` via the `CIPHERS`
+(TLS <= 1.2) and `CIPHERSUITES` (TLS >= 1.3) keys. For example
 
  CIPHERS="ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256"
+ CIPHERSUITES="TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256:TLS_AES_128_GCM_SHA256"
 
 Above is the default. See the ciphers(1) man page from the openssl
 package for a list of all available options.
@@ -131,6 +133,25 @@ both client and `pveproxy`):
  HONOR_CIPHER_ORDER=0
 
 
+Supported TLS versions
+----------------------
+
+The insecure SSL versions 2 and 3 are unconditionally disabled for pveproxy.
+TLS versions below 1.1 are disabled by default on recent OpenSSL versions,
+which is honored by `pveproxy` (see `/etc/ssl/openssl.cnf`).
+
+To disable TLS version 1.2 or 1.3, set the following in `/etc/default/pveproxy`:
+
+ DISABLE_TLS_1_2=1
+
+or, respectively:
+
+ DISABLE_TLS_1_3=1
+
+NOTE: Unless there is a specific reason to do so, it is not recommended to
+manually adjust the supported TLS versions.
+
+
 Diffie-Hellman Parameters
 -------------------------
 
@@ -157,6 +178,13 @@ pveproxy uses `/etc/pve/local/pveproxy-ssl.pem` and
 `/etc/pve/local/pve-ssl.pem` and `/etc/pve/local/pve-ssl.key`.
 The private key may not use a passphrase.
 
+It is possible to override the location of the certificate private key by
+setting `TLS_KEY_FILE` in `/etc/default/pveproxy`, for example:
+
+ TLS_KEY_FILE="/secrets/pveproxy.key"
+
+NOTE: The included ACME integration does not honor this setting.
+
 See the Host System Administration chapter of the documentation for details.
 
 COMPRESSION