diff --git a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogCertificate.xml b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogCertificate.xml
index 2056ed88f..c0cd9c95a 100644
--- a/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogCertificate.xml
+++ b/security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogCertificate.xml
@@ -7,9 +7,9 @@
     </field>
     <field>
         <id>certificate.name</id>
-        <label>Name</label>
+        <label>Common Name</label>
         <type>text</type>
-        <help>Name to identify this certificate.</help>
+        <help>Common Name (CN) for this certificate.</help>
     </field>
     <field>
         <id>certificate.description</id>
diff --git a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
index f4540fb5f..1b6d82f43 100644
--- a/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
+++ b/security/acme-client/src/opnsense/mvc/app/models/OPNsense/AcmeClient/AcmeClient.xml
@@ -152,8 +152,8 @@
                 </enabled>
                 <name type="TextField">
                     <Required>Y</Required>
-                    <mask>/^.{1,255}$/u</mask>
-                    <ValidationMessage>Should be a string between 1 and 255 characters.</ValidationMessage>
+                    <mask>/^[^\s^\t^,^;^\\^\/^(^)^\[^\]]{1,255}$/u</mask>
+                    <ValidationMessage>Please provide a valid FQDN, i.e. www.example.com or mail.example.com (max 255 characters).</ValidationMessage>
                 </name>
                 <description type="TextField">
                     <Required>N</Required>
@@ -163,9 +163,9 @@
                 <altNames type="CSVListField">
                     <Required>N</Required>
                     <multiple>Y</multiple>
-                    <mask>/^.{1,16384}$/u</mask>
+                    <mask>/^[^\s^\t^;^\\^\/^(^)^\[^\]]{1,65536}$/u</mask>
                     <ChangeCase>lower</ChangeCase>
-                    <ValidationMessage>Please provide a valid FQDN, i.e. www.example.com or mail.example.com. Field length is limited to 16384 characters.</ValidationMessage>
+                    <ValidationMessage>Please provide one or more valid FQDNs, i.e. www.example.com or mail.example.com. Field length is limited to 65536 characters.</ValidationMessage>
                 </altNames>
                 <account type="ModelRelationField">
                     <Model>
diff --git a/security/acme-client/src/opnsense/mvc/app/views/OPNsense/AcmeClient/certificates.volt b/security/acme-client/src/opnsense/mvc/app/views/OPNsense/AcmeClient/certificates.volt
index e991c05ce..995730d5a 100644
--- a/security/acme-client/src/opnsense/mvc/app/views/OPNsense/AcmeClient/certificates.volt
+++ b/security/acme-client/src/opnsense/mvc/app/views/OPNsense/AcmeClient/certificates.volt
@@ -382,7 +382,7 @@ POSSIBILITY OF SUCH DAMAGE.
             <thead>
             <tr>
                 <th data-column-id="enabled" data-width="6em" data-type="string" data-formatter="rowtoggle">{{ lang._('Enabled') }}</th>
-                <th data-column-id="name" data-type="string">{{ lang._('Certificate Name') }}</th>
+                <th data-column-id="name" data-type="string">{{ lang._('Common Name') }}</th>
                 <th data-column-id="altNames" data-type="string">{{ lang._('Multi-Domain (SAN)') }}</th>
                 <th data-column-id="description" data-type="string">{{ lang._('Description') }}</th>
                 <th data-column-id="lastUpdate" data-type="string" data-formatter="certdate">{{ lang._('Issue/Renewal Date') }}</th>