Add information on the algorithm choice - remote (#4337)

Author: jafiala

guides/common/modules/proc_enabling-omapi-authentication-in-isc-dhcp.adoc

@@ -15,39 +15,46 @@ The integration of an existing remote ISC DHCP service requires that you enable
 +
 [options="nowrap" subs="+quotes"]
 ----
-# tsig-keygen -a hmac-md5 _omapi_key_
+# tsig-keygen -a _Algorithm_Name_ _My_Key_Name_
 ----
 +
-Note that {Project} supports only the `hmac-md5` algorithm for OMAPI authentication.
-// See: https://projects.theforeman.org/issues/36325
+--
+Use the following values in the command:
+
+`_Algorithm_Name_`:: Specifies the algorithm to be used to generate the key.
+You can use any of the values specified in the `tsig-keygen(8)` man page on your system.
+The default algorithm is HMAC-SHA256.
+`_My_Key_Name_`:: Specifies the name of the OMAPI key.
+The default name is `tsig-key`.
+--
 +
-Example output:
+The command outputs key information in the following format:
 +
 [source, none, options="nowrap" subs="+quotes"]
 ----
-key "omapi_key" {
-	algorithm hmac-md5;
-	secret "4z1jwYO0RGUTJbWDepFBdg==";
+key "_My_Key_Name_" {
+	algorithm _Algorithm_Name_;
+	secret "_Key_Secret_";
 };
 ----
 . Edit the `/etc/dhcp/dhcpd.conf` file, and append the following settings:
 +
 [source, none, options="nowrap" subs="+quotes"]
 ----
-key _omapi_key_ {
-	algorithm hmac-md5;
-	secret "_key_secret_";
+key "_My_Key_Name_" {
+	algorithm _Algorithm_Name_;
+	secret "_Key_Secret_";
 };
 omapi-port 7911;
-omapi-key _omapi_key_;
+omapi-key _My_Key_Name_;
 ----
 +
 The settings specified in the example include the following:
 +
-`key _omapi_key_`:: Defines the key, its algorithm and encrypted password.
+`key "_My_Key_Name_"`:: Defines the key, its algorithm and encrypted password.
 Use the output of the `tsig-keygen` command for this directive.
-`omapi-port 7911;`:: Enables the OMAPI protocol in ISC DHCP and defines the port of the protocol.
-`omapi-key _omapi_key_`:: Defines the name of the key the OMAPI interface uses.
+`omapi-port 7911`:: Enables the OMAPI protocol in ISC DHCP and defines the port of the protocol.
+`omapi-key _My_Key_Name_`:: Defines the name of the key the OMAPI interface uses.
 The name must match the one you specified in the `tsig-keygen` command.
 . Restart the `dhcpd` service:
 +