diff -urN e-smith-samba-2.4.0.old/root/etc/e-smith/templates/etc/smb.conf/11maxProtocol e-smith-samba-2.4.0/root/etc/e-smith/templates/etc/smb.conf/11maxProtocol
--- e-smith-samba-2.4.0.old/root/etc/e-smith/templates/etc/smb.conf/11maxProtocol	2020-06-29 10:28:03.771000183 +1000
+++ e-smith-samba-2.4.0/root/etc/e-smith/templates/etc/smb.conf/11maxProtocol	2020-06-29 10:30:59.000000000 +1000
@@ -1,12 +1,23 @@
 {
 # Normally this should not be set as the automatic negotiation phase in the SMB protocol takes care of choosing the appropiate protocol.
-    $OUT = "";
-    if ($smb{ServerMinProtocol})
-    {
-        $OUT .= "min protocol = $smb{ServerMinProtocol}\n";
-    }
-    if ($smb{ServerMaxProtocol})
-    {
-        $OUT .= "max protocol = $smb{ServerMaxProtocol}";
-    }
+$OUT = "";
+our %ProtocolOrder = ( CORE => 1, # samba client default without explicit option; not available for server
+COREPLUS => 2, # not available for server
+LANMAN1 => 3, #samba server default without explicit option
+LANMAN2 => 4,
+NT1 => 5, # CIFS or SMB1
+SMB2_02 => 6,
+SMB2_10 => 7,
+SMB2 => 7, # yes SMB2 default to 2_10
+SMB2_22 => 8,
+SMB2_24 => 9,
+);
+$serverMinProt = $smb{ServerMinProtocol} || "LANMAN1";
+$serverMaxProt = $smb{ServerMaxProtocol} || "SMB2";
+#checking option is possible
+$serverMinProt = ( exists($ProtocolOrder{$serverMinProt}) ) ? $serverMinProt : "LANMAN1";
+$serverMaxProt = ( exists($ProtocolOrder{$serverMaxProt}) && $ProtocolOrder{$serverMaxProt} >= 3) ? $serverMaxProt : "SMB2";
+$serverMinProt = ( $ProtocolOrder{$serverMaxProt} >= $ProtocolOrder{$serverMinProt} ) ? $serverMinProt : $serverMaxProt;
+$OUT .= "min protocol = $serverMinProt\n";
+$OUT .= "max protocol = $serverMaxProt";
 }
diff -urN e-smith-samba-2.4.0.old/root/etc/e-smith/templates/etc/smb.conf/11smbPorts e-smith-samba-2.4.0/root/etc/e-smith/templates/etc/smb.conf/11smbPorts
--- e-smith-samba-2.4.0.old/root/etc/e-smith/templates/etc/smb.conf/11smbPorts	2020-06-29 10:28:03.772000160 +1000
+++ e-smith-samba-2.4.0/root/etc/e-smith/templates/etc/smb.conf/11smbPorts	2020-06-29 10:34:32.000000000 +1000
@@ -1,5 +1,7 @@
 {
-   my $smb_ports = $smb{SMBPorts} || 139;
+my $smb_ports = $smb{SMBPorts} || "139 445";
 
-   "smb ports = $smb_ports";
+$smb_ports = "$smb_ports 445" unless ( $smb_ports =~ /445/ || $ProtocolOrder{$serverMinProt} <= 5 );# $ProtocolOrder{$serverMinProt} > 5
+
+"smb ports = $smb_ports";
 }